Article
Metallurgy & Metallurgical Engineering
Yi Xiao, Li-hui Lang, Wen-cai Xu, De-xin Zhang
Summary: High-quality Ti-6Al-4V powder-solid parts were successfully fabricated using the hot isostatic pressing (HIP) process, which possessed good interfacial strength and mechanical properties.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Physical
Terrence P. Moran, Patricio E. Carrion, Seungjong Lee, Nima Shamsaei, Nam Phan, Derek H. Warner
Summary: This study investigates the efficacy of hot isostatic pressing (HIP) in enhancing the fatigue performance of additively manufactured (AM) Ti-6Al-4V. The limitations of HIP are explored by varying the initial material state through the selection of AM system, powder chemical composition, and process parameters. It is found that the fatigue performance of HIP'd AM Ti-6Al-4V depends on the as-built quality, and differences in common material attributes cannot fully explain the observed discrepancies in performance. Furthermore, exploring HIP parameters outside of ASTM recommendations shows that a reduced temperature and high-pressure treatment significantly improve fatigue performance.
Article
Materials Science, Multidisciplinary
C. Tahri, Th. Chauveau, A. Hocini, G. Dirras, B. Bacroix
Summary: The study compares the efficiency of three different Hot Isostatic Pressing (HIP) post-treatments in reducing defect density in Ti-6Al-4V alloy parts fabricated through Electron Beam Melting. The HIP treatments include standard HIP, High-Temperature HIP, and two-step HIP. Although all three treatments seal internal porosity and increase material density, they show significant variations in morphology, porosity, and hardness. The decrease in density is mainly attributed to the evolution of chemical composition and crystalline structure.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Haijun Liu, Zhimin Zhang, Kaihua Xu, Jishi Zhang, Yong Xue, Qiang Wang
Summary: The study on a hot isostatic pressed Ti-6Al-4V alloy during multi-pass deformation at variable temperature parameters revealed the microstructural and microhardness evolution, showing significant changes in the deformation mechanisms and phase transformations of the alloy. The results also demonstrated the variations in lamellar alpha phase characteristics, such as rotation, length, thickness, and spheroidization, with an increase in strain rates. Additionally, the contribution of calphal in the integrated hardness during multi-pass deformation was found to be greater at higher deformation temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
Riccardo Tosi, Chu Lun Alex Leung, Xipeng Tan, Emmanuel Muzangaza, Moataz M. Attallah
Summary: This study systematically investigates the microstructural evolution of E-PBF/HIP Ti-6Al-4V parts and finds that the microstructure can be controlled by adjusting the porosity and pore morphology. The study also reveals that the grain morphology transitions during HIP are driven by the increase in pore volume and lack-of-fusion pores.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Zhoujin Lv, Haofeng Li, Lida Che, Shuo Chen, Pengjie Zhang, Jing He, Zhanfang Wu, Shanting Niu, Xiangyang Li
Summary: The effects of hot isostatic pressing (HIP) parameters on the microstructure and tensile property of SLM-formed Ti-6Al-4V titanium alloy were investigated. The results showed that HIP performed below the beta-phase transition temperature, and Ti-6Al-4V titanium alloy composed of an alpha phase and beta phase. With the increase in the HIP temperature, the alpha lath coarsened and the content of the beta phase increased, resulting in a decrease in the tensile strength and yield strength. The best matching of strength and plasticity was achieved with an HIP process performed at a temperature of 910 degrees C and pressure of 130 MPa for 2 hours.
Article
Nanoscience & Nanotechnology
Yaoxin Huo, Zhengguan Lu, Min Cheng, Jinping Fan, Junwei Qiao, Lei Xu, Ruipeng Guo, Rui Yang, P. K. Liaw
Summary: This study presents the first investigation on the dwell-fatigue behavior and damage mechanism of as-HIPed Ti-6Al-4V powder compact. The results show that the peak stress and stress ratio have significant effects on dwell fatigue behavior. A crack-initiation and propagation model based on soft-hard grain pairs has been proposed to explain the dwell-fatigue mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Haijun Liu, Qiang Wang, Jishi Zhang, Kaihua Xu, Yong Xue
Summary: The hot flow behavior, spheroidization, dynamic recrystallization (DRX), and fusing of lamellar alpha phase were investigated in Ti-6Al-4V titanium alloy during multi-pass deformation. The flow stress values showed a peak followed by different degrees of softening. The flow stress was highly influenced by deformation parameters such as strain, strain rate, and deformation temperature, and the peak value decreased with increased temperature and decreased strain rate. The main softening mechanisms were found to be DRX, spheroidization, and fusion, depending on the number of deformation passes. The spheroidization of the lamellar alpha phase increased with decreased strain rate or increased strain in two-pass deformation at 900°C. However, in three-pass deformation, the degree of spheroidization did not significantly increase with increasing strain, and fusion of lamellar alpha phase of the same orientation occurred instead. The fraction of DRX of the alpha phase was found to be higher than that of spheroidization in three-pass deformation, indicating it as the main softening mechanism.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jishi Zhang, Haijun Liu, Kaihua Xu, Zhimin Zhang, Qiang Wang, Yong Xue
Summary: The study found that the strain rate has a significant impact on the mechanical properties and microstructure of Ti-6Al-4V titanium alloy specimens fabricated through hot isostatic pressing. Higher strain energy may lead to flow softening of the alpha phase, while Vickers hardness is not sensitive to strain rate.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Engineering, Mechanical
Litton Bhandari, Vidit Gaur
Summary: The fatigue performance of the Ti-6Al-4V alloy built through laser-powder bed fusion was studied. Different post-process methods, including heat treatment, machining, and hot isostatic pressing, were explored to enhance the mechanical and fatigue properties. Machining improved the fatigue properties of the as-built samples, while heat treatment and hot isostatic pressing decreased tensile strength but increased ductility. The fatigue strength was improved with heat treatment and further enhanced by the combination of heat treatment, hot isostatic pressing, and machining.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Meili Zhang, Chi-Ho Ng, Ali Dehghan-Manshadi, Chris Hall, Michael J. Bermingham, Matthew S. Dargusch
Summary: Super beta-transus hot isostatic pressing (HIPing) can transform columnar grains to equiaxed grains in additively manufactured Ti-6Al-4V. It is unclear whether super beta-transus HIPing can also generate isotropic microstructure and mechanical properties in high-density additively manufactured Ti-6Al-4V.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
C. J. Boehlert, I Sabirov, B. Ruiz-Palenzuela, J. Cornide, E. M. Ruiz-Navas
Summary: Ti-22Al-26Nb and Ti-22Al-26Nb-5B compacts were processed using field assisted hot pressing (FAHP), with differences in processing temperatures and times resulting in varying microstructures. Higher processing temperatures led to fewer pores and three-phase microstructures, while longer processing times resulted in microstructural coarsening. Comparisons were made with compacts consolidated using hot isostatic pressing (HIP), showing finer grain sizes in the B-containing compacts. Compositional analysis suggested the presence of a B27 orthorhombic structure with B2TiNb stoichiometry in the Ti-22Al-26Nb HIP compact.Overall, FAHP was shown to be a viable powder metallurgy processing technique for Ti2AlNb-based intermetallic alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Mechanical
Benjamin Guennec, Amine Hattal, Azziz Hocini, Kamilla Mukhtarova, Takahiro Kinoshita, Noriyo Horikawa, Jeno Gubicza, Madjid Djemai, Guy Dirras
Summary: The first study on the four-point bending fatigue behavior of a Ti-6Al-4V alloy reinforced with 1 wt% nano-yttria-stabilized zirconia processed by laser powder bed fusion was conducted. Comparison between untreated and HIPed specimens showed that HIPed specimens exhibited promising fatigue strength.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Min Cheng, Zhengguan Lu, Jie Wu, Ruipeng Guo, Junwei Qiao, Lei Xu, Rui Yang
Summary: The study found that residual pores have little effect on the high-cycle fatigue life of hot-isostatic-pressed alloys, but regrowth of residual pores can be observed after solution heat treatment. The location of pores has the most significant impact on fatigue life compared to other defects.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Nicholas Derimow, Jake T. Benzing, Keenan Hanson, Nikolas Hrabe
Summary: A globular alpha recrystallization has been found on the surface of net shape electron beam powder-bed fusion (PBF-EB) Ti-6Al-4V alloy parts. This recrystallization is a result of powder recovery blasting and hot isostatic pressing treatment (HIP), simulating the thermomechanical treatment required for globularization in wrought Ti-6Al-4V. The thickness of the globular surface alpha layer varies depending on the blasting intensity and the presence of surface protrusions. Controlled blasting parameters and globular surface layer thickness could potentially create tunable fatigue and wear performance.
Article
Materials Science, Multidisciplinary
Xiaohui Shi, Zhiyuan Fan, Zuhan Cao, Ruipeng Guo, Junwei Qiao
Summary: The study investigates the tensile behaviors and mechanisms of commercially pure titanium at different temperatures, revealing that excessive twins may have a detrimental effect on plasticity. The strain hardening rate shows different trends at different strain rates, with serration behavior potentially occurring at low strain rates.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiaohui Shi, Zuhan Cao, Zhiyuan Fan, Ruipeng Guo, Junwei Qiao
Summary: The yield plateau phenomenon in commercially pure titanium is a result of dislocation behaviors controlled by grain size. Fine-grained microstructures facilitate dislocation multiplication, leading to a high density of mobile dislocations with slower interaction, resulting in the appearance of yield plateau behavior. In coarse-grained and ultrafine-grained microstructures, the quick realization of mutual interactions among dislocations at the initial stage of tensile test causes the disappearance of the yield plateau phenomenon.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Min Cheng, Bingbing Yu, Ruipeng Guo, Xiaohui Shi, Lei Xu, Junwei Qiao, Rui Yang
Summary: In this study, a near alpha high temperature titanium alloy was produced and joined using electron beam welding. The results indicate that the microstructure and mechanical properties of the welded joints are influenced by annealing treatment, with residual stress and tensile properties reaching or exceeding those of the base metal.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
L. W. Lan, H. J. Yang, R. P. Guo, X. J. Wang, M. Zhang, P. K. Liaw, J. W. Qiao
Summary: Plasma nitriding was used to create a uniform nitrided layer on Ni45(CoCrFe)40(AlTi)15 high-entropy alloys, improving the friction properties and adhesive strength. The formation of unique nitride particles on the surface after nitriding significantly reduced friction coefficient and wear rate, enhancing the wear resistance of the alloy.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Min Cheng, Zhengguan Lu, Jie Wu, Ruipeng Guo, Junwei Qiao, Lei Xu, Rui Yang
Summary: The study found that residual pores have little effect on the high-cycle fatigue life of hot-isostatic-pressed alloys, but regrowth of residual pores can be observed after solution heat treatment. The location of pores has the most significant impact on fatigue life compared to other defects.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiaosheng Tian, Jie Wu, Zhengguan Lu, Ruipeng Guo, Lei Xu, Rui Yang
Summary: This study investigates the effect of cooling rate on the microstructure and tensile properties of powder metallurgy Ti2AlNb alloy. The results show that the tensile strength of the alloy initially increases and then decreases with increasing cooling rate. The multiphase structure of the alloy consists of dispersive alpha(2) phase, O phase, and B2 phase matrix. At room temperature and 650 degrees C, the alloy exhibits excellent elongation. Under air cooling and water cooling, only alpha(2) and B2 phase are present in the alloy, and it has better elongation at room temperature. At 650 degrees C, a sharp drop in plasticity is observed due to the presence of fine acicular O phase precipitates, reducing the resistance to crack propagation along the prior B2 grain boundary.
Article
Physics, Multidisciplinary
Gongxi Lin, Ruipeng Guo, Xiaohui Shi, Lina Han, Junwei Qiao
Summary: Lightweight multiprincipal element alloys (MPEAs) with high strength and low density are promising as engineering materials. The Ti70Al15V15 alloy consists of a BCC phase and a small amount of B2 phase, while the Ti80Al10V10 alloy is composed of a dual-phase structure with BCC and HCP phases. The different phase compositions result in differences in mechanical properties. At low temperatures, the strength of the alloys further increases and maintains a certain plasticity due to increasing lattice friction stress. Dislocations play a crucial role in plastic deformation for both alloys, and Ti80Al10V10 also shows significant work-hardening capabilities. The theoretical yield strength calculated by analyzing the strengthening mechanism agrees with the experimental values. These results provide new insight into the development of lightweight MPEAs containing Ti and Al.
Article
Multidisciplinary Sciences
Mingwei Zhu, Min Zhao, Min Yao, Ruipeng Guo
Summary: Positron imaging technology has practical value in industrial non-destructive testing, but the noise and artifacts generated during the imaging process of flow field images affect the accuracy of industrial fault diagnosis. This study proposes a new method based on generative adversarial network with zero-shot learning for image denoising of positron flow field. The method achieves image denoising with limited sample data and constrains image generation by constructing the extraction model of image internal features. Experimental results show that the proposed method reduces noise while retaining key image information and performs well in practical applications of industrial flow field positron imaging.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Qiufen Wang, Yu'an Li, Ruipeng Guo, Huifang Tian, Xin Li, Xinya Dai, Zehua Chen
Summary: Li1.1Mn0.55Ni0.3Co0.05O2 (LMRO) oxides were prepared by hydrothermal method and molten salts-assisted sintering method. The material (0.025NS-LMRO) with a mass ratio of 0.025 of urea to metal salts showed uniform distribution of microsphere particles and good sphericity due to the penetration of Li+ driven by molten salts. In lithium-ion batteries, it exhibited specific capacities of charge/discharge at 179.6/104.3 mAh/g under 158.5 mA/g, and the discharge specific capacity and discharge energy density were 122.8 and 385.3 Wh/kg after 150 cycles. The laminar structure of the material was fixed by appropriate amounts of Li+ and transition metal ions acting as pillars to dent the repulsion of adjacent oxygen layers.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Xi Jin, Zhouzhu Mao, Ruipeng Guo, Xuejiao Wang, Xiaohui Shi, Shaochun Yin, Min Zhang, Aidong Lan, Peter K. Liaw, Junwei Qiao
Summary: This work proposes a method to design multicomponent eutectic alloys with disordered face-centred cubic (FCC)/disordered body-centred cubic (BCC) structures along the univariant eutectic line. Based on this method, four FCC/BCC-structured MCEAs in Co-Cr-Fe-Ni-V systems with similar lamellar microstructures but different tensile properties have been successfully designed and prepared. The Cr41Ni39Co10V10 alloy exhibits the highest 0.2% offset yield strength of 591 MPa, ultimate tensile strength of 1076 MPa, and considerable elongation of 10%. Nano-indentation tests reveal that the difference in yield strength is mainly attributed to the strength difference of the FCC matrix, while the BCC/ FCC strength ratio R* accounts for the difference in strain-hardening capability. This work is significant for the exploration of novel MCEAs with excellent properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
R. P. Guo, M. Cheng, C. J. Zhang, J. W. Qiao, C. Cai, Q. J. Wang, D. S. Xu, L. Xu, R. Yang, Y. S. Shi, P. K. Liaw
Summary: By using a two-step hot-isostatic-pressing scheme, more than 80 vol.% randomly orientated equiaxed grains were obtained in a near-alpha PM titanium alloy, leading to a significantly improved fatigue strength of 600 MPa. The enhanced fatigue strength (approximately 25%) is mainly attributed to the in-situ globularization of the lamella-like microstructure, resulting in higher crack nucleation resistance and lower growth rates of short cracks.
SCRIPTA MATERIALIA
(2023)
Article
Multidisciplinary Sciences
Ruipeng Guo, Manuel Ferle, Dennis Nebel, Christof Hurschler
Summary: The purpose of this study was to develop and evaluate a novel active in-vitro shoulder simulator that can accurately emulate all forms of planar and non-planar glenohumeral motions with active muscle simulation. The simulator demonstrated high kinematic accuracy and repeatability in all three rotational degrees of freedom during simulated motions on cadaver specimens. The reliabilities of all individual muscle forces actuated in the simulator were generally excellent. This simulator provides a powerful tool for investigating the biomechanics of shoulder joints and evaluating surgical interventions.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Yaoxin Huo, Zhengguan Lu, Min Cheng, Jinping Fan, Junwei Qiao, Lei Xu, Ruipeng Guo, Rui Yang, P. K. Liaw
Summary: This study presents the first investigation on the dwell-fatigue behavior and damage mechanism of as-HIPed Ti-6Al-4V powder compact. The results show that the peak stress and stress ratio have significant effects on dwell fatigue behavior. A crack-initiation and propagation model based on soft-hard grain pairs has been proposed to explain the dwell-fatigue mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Peng-cheng Li, Tao Wang, Rui-peng Guo, Qing-xue Huang, Xiao-ge Wang
Summary: The SPS technique has great potential for application in the design of Si3N4 materials with customized microstructures and properties. By examining different sintering temperatures, it was observed that the temperature gradient fields affected the transformation of the alpha-Si3N4 phase, resulting in gradient distribution of hardness and fracture toughness values in the prepared ceramics. Furthermore, when the sintering temperature exceeded 1800 degrees C, the hardness gradient reduced, possibly due to oxidation of silicon nitride.
Proceedings Paper
Engineering, Electrical & Electronic
Chen Hao, Yanqiang Shi, Yishan Shi, Yijing Zhang, Zhou Yi, Jianyu Lu, Ruipeng Guo
Summary: This paper proposes a multi-contingency preventive control model for static voltage stability and its corresponding optimal solving algorithm, which enhances the voltage stability of the grid during complex contingencies by optimizing the selection of key contingencies and implementing preventive control strategies.
2022 4TH INTERNATIONAL CONFERENCE ON SMART POWER & INTERNET ENERGY SYSTEMS, SPIES
(2022)
Article
Materials Science, Multidisciplinary
Tongyu Han, Haifeng Shi, Yigang Chen
Summary: In this study, a novel S-scheme system was built by combining CuO with BiVO4 to activate PMS for antibiotic degradation. The system exhibited excellent visible light absorption performance and remarkable charge separation ability, suggesting its potential application in enhancing PMS activation and purifying antibiotics in water.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Linlin Zhou, Tao Yang, Chunyu Guo, Kang Wang, Enhui Wang, Laipan Zhu, Hailong Wang, Sheng Cao, Kuo-Chih Chou, Xinmei Hou
Summary: Piezoelectric silicon carbide (SiC) has been considered for various applications due to its superior properties. However, its brittleness and unsatisfactory piezoelectric response have limited its use. In this study, PVDF/6H-SiC composite fiber films were fabricated and used for assembling high-performance energy harvesters and sensors. The results showed significant improvements in piezoelectric response and sensitivity compared to pure PVDF films. First-principles calculation and finite element analysis confirmed the effect of SiC nanoparticles on the composite film.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Y. F. An, X. P. Chen, L. Mei, P. Ren, D. Wei, W. Q. Cao
Summary: This study systematically investigates the precipitation sequence of Fe-28Mn-11Al-1C-5Ni austenitic low-density steel and its influence on mechanical properties. The results reveal the transformation pathway of kappa' -carbides and B2 particles under different aging conditions. This research is meaningful for guiding the design of new generation dual-nano precipitation austenitic lightweight steel.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Lei Yang, Tingkai Zhao, Abdul Jalil, Huijun Luo, Tao Jiang, Yuan Shu, Yazhou Yin, Weiyu Jia
Summary: In this study, a strategy utilizing oxygen vacancy concentration modulation was used to successfully grow semiconducting single-walled carbon nanotubes (s-SWCNTs) with narrow diameters. The Fe0.01Mg0.99O/CeO2(3) catalyst was employed to provide oxygen vacancies, allowing for selective etching of chemically active carbon nanotube caps during the growth process. The optimized conditions resulted in high purity s-SWCNTs with uniform diameters.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Letter
Materials Science, Multidisciplinary
Lingjun Xu, Pruch Kijkla, Sith Kumseranee, Suchada Punpruk, Tingyue Gu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
X. P. Hu, Y. H. Zhang, C. B. Liu, H. Z. Cui
Summary: In this study, a novel polyaniline (PANI) nanosheet with barrier and passivation functions was synthesized, and its interaction with polymeric resin was enhanced by polydopamine (PDA) wrapping. The composite coating with incorporated PANI@PDA nanosheets showed improved corrosion resistance by providing a longer penetration path and inducing the formation of a passivation film on the metal substrate.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Yan Zhang, Xuehua Liu, Zhiqiang Guo, Chenyu Jia, Feng Lu, Zirui Jia, Guanglei Wu
Summary: In this study, a self-assembling-etching-anchoring growth method was proposed to prepare MXene@Co electromagnetic wave absorbing materials. The hollow structure design and surface anchored growth of magnetic Co particles significantly enhanced the wave absorption performance of the absorber.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Yajing Ren, Yunfeng Li, Guixu Pan, Ning Wang, Yan Xing, Zhenyi Zhang
Summary: Photocatalytic technology utilizing sunlight as a driving force can convert solar energy into other energy sources for storage and use. CdS, as a typical reducing semiconductor, has attracted attention in photocatalysis due to its suitable bandgap and strong reducing ability. However, the photocatalytic performance of CdS is limited by carrier recombination and photocorrosion. Therefore, CdS has been widely developed as a reducing photocatalyst in constructing S-scheme heterojunctions to overcome these limitations.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Diao-Feng Li, Chun-Guang Bai, Zhi-Qiang Zhang, Hui-Bo Zhang, Nan Li, Jian Zhao
Summary: A novel compliant spinal fixation based on compliant mechanisms is designed to effectively reduce stress-shielding effect and adjacent segment degeneration (ASD), but it requires high properties of the used materials. Bulk metallic glasses (BMGs), as young biomaterials, demonstrate excellent comprehensive properties, making them attractive for compliant spinal fixation. In this study, the large deflection deformation behaviors of Zr61Ti2Cu25Al12 (at.%, ZT1) BMG beam were systematically investigated, including elastic, yielding, and plastic deformations. The theoretical nonlinear analytical solution curve predicts the load-deflection relation within the elastic deformation regime and assists in capturing the yielding event, serving as a powerful design tool for engineers. To accurately capture the beginning of the yielding event in biomedical implant applications, the concept of bending proof strength (sigma p,0.05%) with tiny permanent strain of 0.05% was proposed and determined, which is significant for setting the allowable operating limits of the basic flexible elements. The plastic deformation driven by the bending moment can be classified into two stages: the initial stage characterized by nucleation and intense interaction of shear bands, and the second stage dominated by the progressive propagation of shear bands and emergence of shear offsets. The plasticity of BMG beam structures depends on the BMG's inherent plastic zone size (rp), and when the half beam thickness is less than that of rp, the plastic deformation of BMGs behaves in a stable manner, effectively serving as the margin of safety.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Yanlin Li, Zhu Ma, Shanyue Hou, Qianyu Liu, Guangyuan Yan, Xiaoshan Li, Tangjie Yu, Zhuowei Du, Junbo Yang, Yi Chen, Wei You, Qiang Yang, Yan Xiang, Shufang Tang, Xuelin Yue, Meng Zhang, Wenfeng Zhang, Jian Yu, Yuelong Huang, Jiale Xie, Chun Tang, Yaohua Mai, Kuan Sun
Summary: This paper provides an overview of hydrogen progress from solar energy to solar cells, with a focus on photovoltaic-electrolysis and photoelectrochemical/photovoltaic systems. Both systems have achieved a solar-to-hydrogen efficiency of over 10% and show great potential for large-scale application. The challenges and opportunities in this field, including configuration design, electrode materials, and performance evaluation, are summarized. The paper also analyzes and presents perspectives on the potential commercial application and further scientific research for the development of solar-to-hydrogen.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
L. K. Huang, F. Liu, M. X. Huang
Summary: The bainite transformation in medium Mn steels has been experimentally and theoretically studied, and it has been found that the transformation kinetics is slow. However, the introduction of dislocations can significantly accelerate the transformation rate. A new "carbon depletion mechanism" is proposed to explain the role of dislocations in the acceleration of bainite transformation, and a physical model is developed to quantitatively understand the kinetics of bainite transformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Review
Materials Science, Multidisciplinary
Jing Qiao, Lutong Li, Jiurong Liu, Na Wu, Wei Liu, Fan Wu, Zhihui Zeng
Summary: Rare earth plays a crucial role in electromagnetic wave absorption materials, and the strategies of doping rare earth elements and constructing rare earth oxide composites are important for the fabrication of high-efficiency electromagnetic wave absorption materials. This review provides a comprehensive summary of the research background, classification, features, progress, and future development of rare earth electromagnetic wave absorption materials, offering guidance for future development.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Yao Gu, Zhongzheng Yao, Sinan Liu, Huiqiang Ying, Chenyu Lu, Zhenduo Wu, Yang Ren, Jun-ichi Suzuki, Zhenhua Xie, Yubin Ke, Jianrong Zeng, He Zhu, Song Tang, Xun-Li Wang, Si Lan
Summary: Fe-based metallic glasses are promising materials in the fields of advanced magnetism and sensors. This study proposes a novel approach to tailor the amorphous structure through liquid-liquid phase transition, and provides insights into the correlation between structural disorder and magnetic order. The results show that the liquid-liquid phase transition can induce more locally ordered nanodomains, leading to stronger exchange interactions and increased saturation magnetization. The increased local heterogeneity also enhances magnetic anisotropy, resulting in a better stress-impedance effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Hao Yu, Xin Kou, Xueqing Zuo, Ding Xi, Haijun Guan, Pengfei Yin, Lijia Xu, Yongpeng Zhao
Summary: Metal-organic frameworks derived composites are promising EMW absorbers. Cation substitution can improve their absorption performance by regulating morphology and atomic space occupation. However, the mechanisms of how cation substitution affects EMW absorption performance are still not well understood. In this study, imidazolic MOFs were fabricated and tailored by cation substitution strategy to prepare porous composites. The samples showed optimal reflection loss and effective absorption bandwidth values under low filling rate and thin thickness conditions. The intercoupling between multiple atoms and the porous structure introduced by cation substitution contribute to the improved absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Lina Wang, Peiyi Yan, Huairui Chen, Zhuo Li, Shu Jin, Xiaoxiang Xu, Jun Qian
Summary: The narrow bandgap semiconductor MgIn2S4 has been grown onto In2O3 nanofibers using an in situ growing method. The resulting MgIn2S4-In2O3 hybrid nanofibers exhibit strong visible light absorption and intimate MgIn2S4/In2O3 heterointerfaces, leading to highly efficient photocatalytic disinfection of Escherichia coli.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
