Article
Nanoscience & Nanotechnology
Chuan Geng, Bo Huang, Kang Sun, Xindi Ma, Kai Hu, Yandong Jia, Xueling Hou, Wanxia Huang, Qingxi Yuan, Gang Wang
Summary: This study investigates the microstructure of metallic glass fibers with different Poisson's ratios or structural heterogeneities using synchrotron X-ray nano-computed tomography and high-resolution transmission electron microscopy. It is found that interlaminated high- and low-density layers induced by shear banding appear in the fracture-affected zone of the fibers. The fraction of crystal-like order regions in the fracture-affected zone is larger than that of the unaffected matrix.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Chuan Geng, Bo Huang, Nizhen Zhang, Jun Yi, Qing Wang, Yandong Jia, Fucheng Li, Junhua Luan, Xueling Hou, Wanxia Huang, Qingxi Yuan, Gang Wang, Weihua Wang
Summary: This study investigates the structural formation and evolution of shear bands inside metallic glasses using synchrotron X-ray nano-computed tomography and high-resolution transmission electron microscopy. The researchers found that the thickness of shear bands increases and their local densities decrease during plastic deformation. Prior to crack formation, low-density regions in shear bands evolve into nanovoids, and densified regions with crystal-like order appear around severe bond breaking. These findings are significant for understanding the evolution of shear bands and the plastic deformation mechanism of glassy materials.
Article
Nanoscience & Nanotechnology
B. Huang, X. C. Tang, C. Geng, Q. F. He, J. Yi, Q. Wang, W. X. Huang, Q. X. Yuan, Y. Yang, G. Wang, W. H. Wang
Summary: Using synchrotron X-ray nano-computed tomography and finite element analysis, we reconstructed the nanostructure of shear bands (SBs) and investigated their formation and evolution in a bent heterogeneous Pd-based metallic glass fiber. We found that in addition to plain SBs (PSBs), there were hidden SBs (HSBs) with density fluctuations inside the metallic glass. The HSBs had average densities 5%-25% smaller than the surrounding matrix and thicknesses ranging from 100 nm to 530 nm. The structures of the HSBs were closely related to the heterogeneous structure and local strain rate of the metallic glass.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ruitao Qu, Cynthia A. Volkert, Zhefeng Zhang, Feng Liu
Summary: The plastic yielding behavior of a brittle Fe-based metallic glass can be activated by decreasing the sample size to the micrometer scale. The yield strength of the brittle metallic glass was found to be at least 33% higher than the fracture strength measured with bulk samples. These findings clarify the physical nature of the strength of brittle metallic glasses and suggest the potential for using high-strength brittle metallic glasses in small-sized devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mohammad Taghi, Asadi Khanouki
Summary: This paper investigates the temperature rise in shear bands and its effect on crystallization behavior in bulk metallic glasses. The temperature profile inside and around shear bands is determined by the released elastic energy, shear band thickness, and energy transfer time. The size of the hot zone is found to be equal to the stable crack growth region, while the size of the liquid zone is equal to the vein pattern size on the fracture surface. Crystallization occurs around hot shear bands and inside cold shear bands, but only on the compressive side of the specimen. These findings provide valuable insights into the deformation behavior of bulk metallic glasses using an analytical approach.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hongbo Zhou, Laiquan Shen, Baoan Sun, Weihua Wang
Summary: Metallic glasses have unique mechanical properties due to their disordered structure. Understanding the atomic mechanisms of shear banding behavior is important for improving their mechanical properties. This review provides an overview of shear band nucleation, propagation, and interaction, as well as the dynamics and properties of mature shear bands. The fracture mechanism based on cavity development is also discussed, and key unsolved issues in this field are identified.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Qu Ruitao, Wang Xiaodi, Wu Shaojie, Zhang Zhefeng
Summary: This paper reviews the research on shear banding behaviors in metallic glasses and their mechanisms under different loading conditions, including shear band propagation, cracking, and unstable fracture. Additionally, the effects of sample size, external confinement, and testing temperature on shear banding behavior, as well as the splitting and fatigue crack mechanisms in brittle metallic glasses, are discussed.
ACTA METALLURGICA SINICA
(2021)
Article
Materials Science, Multidisciplinary
Xiangkui Liu, Jian Kong, Xinxiang Song, Shuai Feng, Qipeng Wang, Yang Yang, Tianchi Wang
Summary: The size dependence of ductile to brittle transition in Zr-based metallic glasses was investigated through small punch test, revealing a significant difference in behavior between thin and thick samples. Two critical deformation factors, alpha(c1) and alpha(c2), were identified at sample thicknesses of 200 and 500 mm, triggering the initiation of circumferential and radial shear bands respectively. The interaction of multiple shear bands significantly enhances the ductility of samples with alpha >= alpha(c1).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Srishti Mishra, Snehanshu Pal
Summary: The structural evolution of Al90Sm10 metallic glass nanowire under torsion deformation at different speeds has been investigated using molecular dynamics simulation. It was found that with increasing torsion speed, the generation of shear transformation zones becomes uneven and the width of shear bands is constrained to narrow regions. Furthermore, the improvement of Voronoi polyhedra also enhances plastic deformation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Jian Luo, Liping Huang, Yunfeng Shi, Binghui Deng
Summary: We conducted molecular dynamics simulations on metallic glasses to investigate the dynamics of shear band propagation. Our findings reveal that shear bands in metallic glasses exhibit supersonic propagation speed, microbranching, and velocity fluctuations, indicating intrinsic instability. The intersection of two shear bands under tension also leads to path deflection, speed slowing-down, and temperature rise at the junction region. These results suggest that shear bands in metallic glasses can be viewed as shear cracks in weakly nonlinear fracture mechanics theory.
Article
Chemistry, Physical
J. X. Zhao, R. Liu, D. Mao, J. He
Summary: This study investigated the effects of notch tip distance and stress triaxiality on the mechanical properties of cellular metallic glasses. The results showed that these two factors play key roles in controlling the yield strength and plasticity of notched samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jiaqian Xi, Fan Yang, Xiang Zhang, Haofei Zhou
Summary: Introducing crystalline dendrites can enhance the plasticity of metallic glass matrix composites. The geometry of the dendrites significantly influences the mechanical properties of the material.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
C. Liu, Y. Ikeda, R. Maass
Summary: This study provides strong evidence for the accumulation of structural damage in Zr-based bulk metallic glass as a result of shear strain admitted by shear bands. Analysis of shear-band structure with high-angle annular dark field transmission electron microscopy reveals scattered data with an overall trend of increasing local volume dilatation with increasing shear strain. However, locally, a variety of trends are observed, highlighting the strong heterogeneity of structural damage in shear bands in metallic glasses.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Chemistry, Physical
Sergio Scudino, Junhee Han, Rub Nawaz Shahid, Dina Bieberstein, Thomas Gemming, Jon Wright
Summary: Shear bands are nanoscale planar shear defects that mediate plasticity in metallic glasses. The understanding of shear banding requires three-dimensional characterization, which was not possible until now due to the inability of X-ray absorption tomography to distinguish shear bands from the surrounding matrix. However, this study overcomes this limitation by using the strain field generated by shear bands as a local probe for X-ray diffraction tomography.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yanyan Liu, Qin Yu, Guoqi Tan, Mingyang Zhang, Enling Tang, Shaogang Wang, Zengqian Liu, Qiang Wang, Zhefeng Zhang, Robert O. Ritchie
Summary: Highly efficient magnesium composites with fish-scale-like orthogonal plywood and double-Bouligand architectures were developed using bioinspired methods. These composites exhibit enhanced strength and work-hardening ability compared to simple mixtures of their constituents. The double-Bouligand architecture effectively deflects cracking paths, alleviates strain localization, and reorients titanium fibers within the magnesium matrix during deformation, successfully implementing the property-optimizing mechanisms observed in fish scales. This study provides a feasible approach for developing bioinspired metal-matrix composites with improved performance and offers theoretical guidance for their architectural designs.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Ceramics
Xiaotao Li, Ruitao Qu, Wei Rao, Xiaoyu Jiang
Summary: This study proposes a new method to predict shear bands in metallic glasses using continuously distributed dislocations. The possible positions of shear band initiation are determined based on the elastic stress field, and the direction and length of shear band propagation are determined by the distributed dislocation technique. The finite element simulations show consistent results with the theoretical modeling, validating the effectiveness of using distributed dislocations to predict shear bands.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Yuan Wu, Fei Zhang, Fengshou Li, Yi Yang, Jiaming Zhu, Hong-Hui Wu, Yao Zhang, Ruitao Qu, Zhefeng Zhang, Zhihua Nie, Yang Ren, Yandong Wang, Xiongjun Liu, Hui Wang, Zhaoping Lu
Summary: Research on high-entropy intermetallic compounds has revealed superelasticity with high critical stress, fracture strength, and minimal temperature sensitivity. The complex sublattice occupation facilitates the formation of nano-scaled local chemical fluctuation, leading to ultra-sluggish martensitic transformation.
MATERIALS HORIZONS
(2022)
Article
Nanoscience & Nanotechnology
Wen-Kai Hu, Ling-Zhi Liu, Lijie Zou, Jun-Chao Shao, Shao-Gang Wang, Hai-Jun Jin
Summary: A crucibleless liquid metal dealloying (CLMD) procedure was developed to prepare porous materials with improved strength and stiffness. The chemical dissolution of the backbone phase leaves behind a porous-structured matrix, which is the inverse replica of the dealloyed network structure. The ease of the CLMD method and the improved mechanical stability of the obtained porous materials may enable practical applications in various areas.
SCRIPTA MATERIALIA
(2022)
Article
Metallurgy & Metallurgical Engineering
Yufeng He, Shaogang Wang, Jian Shen, Dong Wang, Yuzhang Lu, Langhong Lou, Jian Zhang
Summary: The evolution of micro-pores in a single crystal nickel-based superalloy during creep at 980 degrees C/220 MPa was investigated using X-ray computed tomography. The results show that the formation and growth of micro-pores mainly occur at the end of secondary/beginning of tertiary creep stage. The irregular large pores and high density pores located at strain concentration region are the major factors leading to creep damage. Creep failure is caused by the connection of surface cracks induced by oxidation and the internal cracks generated from growth and merging of micro-pores.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Multidisciplinary Sciences
Lei-Lei Lu, Yu-Yang Lu, Zheng-Xin Zhu, Jia-Xin Shao, Hong-Bin Yao, Shaogang Wang, Tian-Wen Zhang, Yong Ni, Xiu-Xia Wang, Shu-Hong Yu
Summary: The poor rate capability of graphite anodes hampers the charging speed of lithium-ion batteries. This study presents a previously unreported dual-gradient structure design in the graphite anode, which improves the charging capability and achieves extremely fast-charging.
Article
Multidisciplinary Sciences
Mingyang Zhang, Ning Zhao, Qin Yu, Zengqian Liu, Ruitao Qu, Jian Zhang, Shujun Li, Dechun Ren, Filippo Berto, Zhefeng Zhang, Robert O. Ritchie
Summary: In this study, the authors fabricated a Mg-Ti interpenetrating phase composite with bioinspired architectures, including brick-and-mortar, Bouligand, and crossed-lamellar structures, through pressureless infiltrating method. These architectures improved the mechanical properties of the materials, enhancing strength and ductility. They also activated various toughening mechanisms, resulting in increased fracture resistance.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
X. J. Fan, R. T. Qu, Z. F. Zhang
Summary: The BCC HfNbTaTiZr refractory HEA exhibits remarkable fracture toughness in addition to its high strength, good tensile ductility, and excellent high-temperature properties. This material shows promise for applications in high-temperature structural materials such as in the aerospace field.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shuhan Yuan, Hailong Li, Chengfu Han, Wenqiang Li, Xiaofei Xu, Chen Chen, Ran Wei, Tan Wang, Shaojie Wu, Fushan Li
Summary: A FeCoNiCrAl0.6 high-entropy alloy (HEA) coating was prepared on Q235 steel using the laser cladding method, leading to improved surface properties. The coating exhibited a dual-phase structure dominated by face-centred cubic (FCC) solid solution, and showed good corrosion resistance.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Ruitao Qu, Shaojie Wu, Cynthia A. Volkert, Zhefeng Zhang, Feng Liu
Summary: In this study, a significant size effect on the strength, plasticity, and fracture behavior of the VNbMoTaW RHEA was shown. The brittle cracking behavior of RHEA was greatly suppressed as the sample size decreased from millimeter to sub-micrometer scale, resulting in enhanced strength and plasticity. The improved mechanical properties can be attributed to the disappearance of crack initiation sites, size-dependent dislocation plasticity, and size-dependent competition in thermodynamics.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Chenxi Dou, Mingyang Zhang, Dechun Ren, Haibin Ji, Zhe Yi, Shaogang Wang, Zengqian Liu, Qiang Wang, Yufeng Zheng, Zhefeng Zhang, Rui Yang
Summary: A Mg-Ti composite with a bi-continuous and mutually interspersed architecture has been fabricated, showing potential as a new partially degradable and bioactive implant material.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ruitao Qu, Cynthia A. Volkert, Zhefeng Zhang, Feng Liu
Summary: The plastic yielding behavior of a brittle Fe-based metallic glass can be activated by decreasing the sample size to the micrometer scale. The yield strength of the brittle metallic glass was found to be at least 33% higher than the fracture strength measured with bulk samples. These findings clarify the physical nature of the strength of brittle metallic glasses and suggest the potential for using high-strength brittle metallic glasses in small-sized devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Liu, Zongde Kou, Ruitao Qu, Weidong Song, Yijia Gu, Changshan Zhou, Qingwei Gao, Jiyao Zhang, Chongde Cao, Kaikai Song, Vladislav Zadorozhnyy, Zequn Zhang, Juergen Eckert
Summary: This study utilizes high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co34Cr32Ni27Al3.5Ti3.5 multicomponent alloy. Hot extrusion reduces grain sizes and promotes the precipitation of nanoparticles inside the FCC matrix and grain boundaries. Subsequent annealing regulates the microstructures and enhances the mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Qiuyu Gao, Ran Wei, Shilin Feng, Chen Chen, Zhenhua Han, Liangbin Chen, Tan Wang, Shaojie Wu, Fushan Li
Summary: This work presents a unique low-cost medium-entropy alloy (MEA) with ultra-high strength and ductility. The MEA exhibits a duplex partially recrystallized microstructure consisting of FCC and BCC phases, along with high density dislocations and nano-precipitates. It shows excellent yield strength and uniform elongation at both room temperature and cryogenic temperatures, as well as a high ultimate tensile strength at 77K. The excellent cryogenic mechanical properties can be attributed to various factors including high density dislocations, ultra-fine grains, nano-precipitates, Luders deformation, hetero-deformation-induced hardening, and deformation-induced martensitic transformation.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Shilin Feng, Xinghua Zhang, Ran Wei, Qiuyu Gao, Chen Chen, Tan Wang, Yongfu Cai, Fushan Li, Shaojie Wu
Summary: The addition of Ti and Mo significantly improves the yield strength and ductility of metastable dual-phase Fe60Cr15Ni16Al9 CCA. The obtained Fe60Cr15Ni16Al7Ti1Mo1 CCA exhibits excellent yield strength and ductility at low temperature.
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)
