Article
Materials Science, Multidisciplinary
Xiong Gao, Meiling Wang, Tingguang Liu, Yonghao Lu, Ahsan Ejaz
Summary: Thermo-mechanical treatment can significantly increase the proportion of low-sigma CSL grain boundaries in TP347H stainless steel, thus suppressing intergranular corrosion.
MATERIALS SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Shunyu Yao, Hengbin Zhang, Fengcang Ma, Ping Liu, Lin Song, Wei Li, Ke Zhang, Xiaohong Chen
Summary: Grain boundary engineering (GBE) is a method to optimize the grain boundary characteristics of metals and improve their resistance to intergranular corrosion (IGC). This study quantitatively investigated the effect of various GBE processing on the fraction of low SCSL grain boundaries and random large-angle grain boundary connectivity in 304 stainless steel. The corrosion behaviors of samples with different grain boundary characteristics were studied in terms of the fractal dimension, and a correlation between the fractal dimension and the corrosion resistance was established.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Y. Jiang, X. Zhou, X. Y. Li, K. Lu
Summary: Grain boundary relaxation can stabilize nanograined structures in many FCC metals and alloys, but this mechanism is interfered by deformation-induced martensitic transformation in 304 stainless steels. In this study, gradient FCC nanograined structures were prepared in a 304 stainless steel and triggered GB relaxation was observed in samples with grain sizes below 60 nm. Thermal stability increased with decreasing grain size, contrary to the conventional trend. Martensitic nanograins of the same composition did not exhibit GB relaxation, as their instability temperature was controlled by reverse martensitic transformation.
Article
Materials Science, Multidisciplinary
Wen Feng, Zheng Wang, Qiang Sun, Yiqiang He, Yuanxing Sun
Summary: In this study, thermomechanical processing was used to optimize the grain boundary character distribution (GBCD) of 304 austenitic stainless steel. The effect of GBCD evolution on intergranular corrosion (IGC) was investigated, and the results showed that the increase in low-1 coincident site lattice (CSL) boundaries improved the corrosion resistance of the steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Metallurgy & Metallurgical Engineering
F. Shi, L. Yan, J. Hu, L. F. Wang, T. Z. Li, W. Li, X. J. Guan, C. M. Liu, X. W. Li
Summary: This study systematically explored the optimization of grain boundary character distribution (GBCD) and its effect on the resistance of intergranular stress corrosion cracking (IGSCC) in a cold-rolled and subsequently annealed high-nitrogen nickel-free austenitic stainless steel. The results showed that the presence of stacking faults and planar slip bands at the right amount of deformation was beneficial for the GBCD optimization. The proportion of special boundaries increased during recrystallization and grain growth, accompanied by the growth of twin-related domain. After GBCD optimization, low sigma coincidence site lattice (CSL) boundaries and special triple junctions greatly hindered nitride precipitation along grain boundaries and enhanced the ability for intergranular crack arrest, thus improving the IGSCC resistance of the steel.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
V. L. Cruz-Hernandez, R. Garcia-Hernandez, V. H. Lopez-Morelos, M. A. Garcia-Renteria, J. Gonzalez-Sanchez
Summary: The application of external low-intensity electromagnetic fields (EMFLI) improves the resistance to intergranular corrosion (RIGC) in stainless steel welding by reducing sensitization and minimizing the formation of ferrite and Cr depletion.
Article
Materials Science, Multidisciplinary
Zhiguo Wang, Fei Gao, Shuai Tang, Peng Zhou, Weina Zhang, Zhenyu Liu
Summary: This article investigates the effect of different distributions of twin boundaries on carbide precipitation and intergranular corrosion (IGC) behavior in nuclear-grade stainless steel. The study reveals that interconnected twin boundaries can effectively block IGC percolation and greatly improve the corrosion resistance of the material.
Article
Materials Science, Multidisciplinary
Mingxian Zhang, Chenxin Zhang, Huanchun Wu, Bin Yang
Summary: Grain boundary engineering treatment can optimize the grain boundary character distribution of 316L austenitic stainless steel and improve corrosion fatigue life. Under specific treatment conditions, a high proportion of special boundaries and interrupted network of high-angle grain boundaries can be obtained.
FRONTIERS IN MATERIALS
(2022)
Article
Chemistry, Physical
Young-Ran Yoo, Seung-Heon Choi, Young-Sik Kim
Summary: Dry canisters used in nuclear power plants may experience localized corrosion, such as stress corrosion cracking, due to residual and external tensile stress. Various methods, including laser peening, can mitigate residual stress and enhance the corrosion properties of the material. This study investigated the effect of laser peening with/without a thin aluminum layer on the corrosion behavior of welded 304L stainless steel.
Article
Materials Science, Multidisciplinary
Pei He, Xiangyu Wang, Kangkang Zheng, Yiming Jiang, Jin Li, Yangting Sun
Summary: This research investigates the distribution of hydrogen and hydrogen-facilitated intergranular corrosion (IGC) in an austenitic stainless steel. The study finds that while coherent twin boundaries sigma 3 normally exhibit excellent corrosion resistance, they become prone to IGC after hydrogen charging. The results also show that the inhomogeneous distribution of absorbed hydrogen leads to IGC at grain boundaries, regardless of whether the steel is solution-treated or sensitized. The study proposes a model to explain this distinct type of IGC induced by hydrogen.
Article
Engineering, Mechanical
Menghao Liu, Zhuoyan Ni, Cuiwei Du, Zhiyong Liu, Meihui Sun, Endian Fan, Qiuyu Wang, Xiaojia Yang, Xiaogang Li
Summary: The investigation revealed that the failure of a heavily cracked geothermal water convection tube was caused by stress corrosion cracking induced by chloride in the service environment and sensitization of the matrix. Additionally, residual stress arising from the manufacturing process also promoted the failure process.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Physical
Congwei Li, Jialei Zhu, Zhihai Cai, Le Mei, Xiangdong Jiao, Xian Du, Kai Wang
Summary: The research studied the phase composition and corrosion resistance of a duplex stainless steel coating prepared using underwater laser technologies. It was found that underwater laser remelting can improve the corrosion resistance of the coating, with the best corrosion resistance observed at 3 kW.
Article
Materials Science, Multidisciplinary
S. Aamani, C. R. Das, Surendra K. Martha, Bharat B. Panigrahi
Summary: The influence of nitrogen content and percentage of prior rolling deformation on the evolution of grain boundary character distribution in 316L(N) stainless steel during grain boundary engineering type thermomechanical processing has been studied. Suitable thermomechanical processing can improve corrosion resistance in stainless steel by producing low energy sigma 3 boundaries and low energy grain boundary network.
Article
Chemistry, Physical
Xinxin Zhang, You Lv, Teruo Hashimoto, Jan-Olov Nilsson, Xiaorong Zhou
Summary: In this study, the influence of trace level Cu on intergranular corrosion in AA6082 alloy was investigated using accelerated corrosion testing and high resolution electron microscopy. It was found that Al2Cu precipitates promoted IGC at the grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Yuanlong Chen, Xiang Li, Jinyang Liu, Yichi Zhang, Xuehui Chen
Summary: In this study, the effect of laser surface remelting on the microstructure and properties of 304 stainless steel remelted layer was investigated by changing the laser scanning overlap rate. The results showed that laser surface remelting improved the hardness, adhesion force, and corrosion resistance of the stainless steel.
Article
Materials Science, Ceramics
Xu Wang, Yuxuan He, Chao Wang, Yu Bai, Fan Zhang, Yusheng Wu, Guihong Song, Zhan Jie Wang
Summary: Novel high-entropy ceramics were prepared for thermal environmental barrier coatings (TEBCs) and the influence of configuration entropy and lattice distortion on microstructures and thermal properties at high temperature was investigated. The results showed that configuration entropy contributed to the stability of thermal properties and microstructure, while lattice distortion reduced thermal properties due to enhanced atomic nonharmonic vibration.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Yinuo Duan, Duandan Shangguan, Chao Wang, Yu Bai, Fan Zhang, Yusheng Wu, Guihong Song, Zhan Jie Wang
Summary: In this study, (1-x)PbZrO3-xSrTiO(3) (PZO-STO) antiferroelectric films were prepared and the effects of STO content on the microstructure and energy storage performance were investigated. The results showed that thin films with 20% STO content had the highest energy storage density.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Chengcheng Zhang, Kai Feng, Hiroyuki Kokawa, Zhuguo Li, Ke Chen
Summary: This work investigates the effects of friction stir processing (FSP) on the CoCrFeMnNi alloy fabricated via laser powder bed fusion (LPBF). The study focuses on the modification of surface microstructure and the investigation of grain structures, dislocation structures, texture, and dynamic recrystallization. The experimental results demonstrate that both continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) occur during FSP, leading to a refined grain size and a more uniform grain size distribution in the stir zone (SZ).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Tong Shi, Fan Zhang, Wuyou Sun, Jinrui Li, Yu Bai, Chao Wang, Shiying Liu, Xin Wang, Yunhong Yang, Zhan Jie Wang
Summary: In this study, composite ceramics of 0.94Mg((1-3x/2))Ce(x)TiO(3)-0.06(Ca0.8Sr0.2)TiO3 (MCexT-CST, 0 <= x <= 0.01) were prepared at a low temperature of 1175 degrees C. The effects of Ce3+ doping on crystalline phase, microstructure, and microwave dielectric properties of MCexT-CST were investigated. The results showed that Ce3+ substitution effectively inhibited oxygen vacancy formation and improved the Qxf value of the material.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Chengcheng Zhang, Kai Feng, Hiroyuki Kokawa, Zhuguo Li
Summary: The relationship between the hierarchical microstructure and mechanical properties of a CoCrFeMnNi high entropy alloy built by laser powder bed fusion (LPBF) was investigated. The study found that both the columnar grain morphology and texture play important roles in the anisotropy of mechanical properties. The volume-weighted average grain size showed high accuracy in estimating the yield strength and critical twinning stress along different directions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Xiaotong Pang, Zhihui Xiong, Shilong Liu, Junhao Sun, R. D. K. Misra, H. Kokawa, Zhuguo Li
Summary: Significant grain refinement of beta grains in metastable beta TB2 titanium alloy was achieved through the minor addition of zirconium diboride during laser melting deposition. The addition of 0.5 wt% ZrB2 resulted in smaller beta grains and improved mechanical properties, including higher ultimate tensile strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Jun Liang Lin, Yuanwei Sun, Ri He, Yanxi Li, Zhicheng Zhong, Peng Gao, Xiang Zhao, Zhidong Zhang, Zhan Jie Wang
Summary: Artificial superlattices with SrRuO3 layers of 2 unit cell thickness exhibit a robust room-temperature ferroelectric polarization. Oxygen vacancies accumulated at the SrTiO3/SrRuO3 interfaces cause lattice distortions and increased tetragonality. The observed ferroelectric responses are mainly attributed to the broken spatial inversion symmetry induced by the ordered distribution of oxygen vacancies at the interfaces, coupled with the triggering of external electric field.
Article
Materials Science, Ceramics
Yuxuan He, Xu Wang, Chao Wang, Shiying Liu, Liuyuan Li, Yusheng Wu, Zhanjie Wang
Summary: A novel high-entropy (4RE(0.25))(2)Si2O7/(4RE(0.25))(2)SiO5 (RE = Y, Yb, Er, and Sc) multiphase ceramic was prepared to improve the resistance of rare-earth silicates to molten CMAS at high temperature. The ceramic exhibited a reaction layer thickness of only 55 μm after 48 h of corrosion at 1500 degrees C, indicating its effectiveness in resisting molten CMAS corrosion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Chengcheng Zhang, Kai Feng, Hiroyuki Kokawa, Zhuguo Li
Summary: The origin and evolution of cellular structures during LPBF were investigated using a CoCrFeMnNi high entropy alloy. Experimental results demonstrated that chemical cells with low dislocation density were generated simultaneously and overlapped with each other. The stability of the chemical cells contributes to the unique characteristics of cellular structures relative to conventional deformation-induced dislocation structures.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Jie Zhu, Chendong Shao, Fenggui Lu, Kai Feng, Pan Liu, ShuFen Chu, Yueqiao Feng, Hiroyuki Kokawa, Zhuguo Li
Summary: This work investigates the anisotropic ductility and deformation behavior of laser powder bed fusion (LPBF) processed Inconel 625 at elevated temperature. The rotation of grains plays a crucial role in the dynamic recrystallization-like flow stress fluctuation, while grain boundary embrittlement leads to the decrease in ductility.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Ceramics
Xue Zhang, Fan Zhang, Yiwen Niu, Zhiqiang Zhang, Yu Bai, Zhanjie Wang
Summary: A novel lead-free high-entropy ceramic system (BNCBST-xLa) was designed with La substitution to enhance energy storage performance, and prepared through a hydrothermal method. La doping induced lattice distortion and improved dielectric relaxation. In addition, La content inhibited grain growth, resulting in increased insulation resistance and electric breakdown strength. The system with x = 0.03 exhibited excellent recoverable energy density and high energy storage efficiency, along with wide temperature stability. These findings suggest promising applications of La-modified BNBCST HECs in energy storage.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Jie Zhu, Hiroyuki Kokawa, Kai Feng, Zhuguo Li
Summary: The intergranular corrosion resistance of Inconel 625 produced by laser powder bed fusion was investigated using ASTM-G28 method A. Severe corrosion near fusion boundaries was unexpectedly found. The initiation and expansion of corrosion along the fusion boundaries and the relationship between microstructure and corrosion behavior were analyzed. This unusual corrosion behavior was attributed to the Volta potential variation caused by Al2O3 nanoparticles and Mo, Nb-rich precipitates near the fusion boundaries. This finding can enhance the understanding of corrosion behavior in laser powder bed fused nickel alloys.
Article
Nanoscience & Nanotechnology
Jie Zhu, Jintao Xu, Hiroyuki Kokawa, Yakai Zhao, Kai Feng, Zhuguo Li, Upadrasta Ramamurty
Summary: This study demonstrates that periodic variation in layer thickness during laser powder bed fusion (LPBF) can alter the grain growth direction and effectively suppress the formation of columnar grains. This build strategy decreases both grain size and texture intensity, resulting in reduced anisotropy in mechanical properties. The variation in grain growth direction can be explained by the thermal gradient variation near the transition area after the alteration of layer thickness. This simple strategy provides an additional and new tool for grain structure tailoring during LPBF.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Yutaka S. Sato, Tomoko Miyamori, Shun Tokita, Hiroyuki Kokawa
Summary: This research examined the feasibility of using friction stir welding (FSW) to repair rusted steel structures in an underwater environment. The results showed that underwater FSW could produce high-quality welds on 0.45%C steel, with lower working temperatures and faster cooling rates compared to conventional FSW. This resulted in increased hardness and tensile strength of the welds. The rust layer had minimal impact on weldability, but fragmented rust trapped near the top surface of the weld zone at higher rotational speeds decreased the strength of the weld.
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Yutaka S. Sato, Yuichiro Tanai, Dalong Yi, Tianbo Zhao, Hiroyuki Kokawa
Summary: The heat-input during Friction Stir Welding (FSW) of aluminum alloys was found to be influenced by the geometry of the welding tools, with a particularly strong dependence on probe dimensions. A linear relationship between heat-input and effective surface area of the tool was experimentally shown, suggesting a higher than expected impact of probe dimensions on heat-input. Furthermore, an empirical equation successfully estimated the heat-input during FSW based on welding parameters and tool geometry.
FRICTION STIR WELDING AND PROCESSING XI
(2021)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
