Article
Nanoscience & Nanotechnology
Bin Sun, Kuishan Sun, Xianglong Meng, Jun Wang
Summary: The twinning behavior of a Ti-26Nb alloy during thermal cycling was investigated using transmission electron microscopy. The study proposed the interrelationships between displacive transformation and twinning. The formation and growth of twins during the cycling process were observed, and the role of the interfacial twin boundary alpha phase in mediating the martensitic transformation was revealed.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Yu Fu, Wenlong Xiao, Damon Kent, Jian Rong, Xinqing Zhao, Chaoli Ma
Summary: Natural aging was investigated in a TRIP Ti alloy, resulting in a significant increase in yield strength without sacrificing ductility. This was achieved through decreased particle size, leading to continuous stress-induced β-α' martensitic transformation over a wider range of strains, enhancing both strength and uniform elongation.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Karri Sri Naga Sesha, Kenta Yamanaka, Manami Mori, Yusuke Onuki, Shigeo Sato, Damien Fabregue, Akihiko Chiba
Summary: This study demonstrates the combined TRIP/TWIP effect in an alpha + beta titanium alloy by introducing metastable retained beta-phase, enhancing work hardening and uniform elongation.
MATERIALS RESEARCH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Hugo Schaal, Philippe Castany, Thierry Gloriant
Summary: The Ti-22Zr-9Nb-2Sn (at%) metastable β-titanium alloy was fabricated through in situ laser powder bed fusion process. Mechanical characterization using cyclic tensile tests demonstrated an exceptionally high strain-hardening behavior, which was induced by a massive stress-induced martensitic transformation from β to α phase.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Sang Won Lee, Jae Hyeok Kim, Chan Hee Park, Jae-Keun Hong, Jong-Taek Yeom
Summary: A new alloy design of metastable alpha+beta-Ti alloy with a mix of high yield strength alpha phase and low elastic modulus metastable beta phase has been proposed in this study, achieving an excellent combination of strength and ductility with a high elastic admissible strain. Heat treatment in the alpha+beta regime is an effective method for grain refinement, resulting in high strength without increasing the elastic modulus.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Composites
Jiaming Zhu, Peijian Chen, He Huang, Gang Zhang, Feng Hao, Kaikai Li
Summary: The ageing of human bone leads to bone diseases and joint functional failure. Joint replacement is effective in relieving pain and restoring function. The newly developed Ti2448 possesses excellent mechanical properties, especially its low modulus. It exhibits a special non-linear elastic deformation behavior due to stress-induced martensitic transformation.
COMPOSITES COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
T. T. Yao, Y. G. Zhang, L. Yang, Z. Q. Bu, J. F. Li
Summary: This study aims to improve the plasticity of body-centered cubic multi-principal element alloys (MPEAs) by adding different amounts of aluminum to a base alloy. The resultant Ti52Zr34Nb8Al6 alloy exhibits an extraordinary tensile strain of 35%, while maintaining high yield strength and ultimate tensile strength. Microstructural investigations reveal that the exceptional mechanical properties are attributed to stress-induced martensite transformation and subsequent hierarchical deformation twinning.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Feng Zhang, Jun Feng, Wei Xiang, Qiang Fu, Wuhua Yuan
Summary: In this study, it was found that slow heating during the aging process of the TB18 alloy can lead to finer intragranular alpha plates due to the abundance of omega/beta interfaces provided by omega iso particles. This provides heterogeneous nucleation sites for alpha precipitates and reduces the nucleation driving force. Appropriate omega-assisted nucleation can enhance the ductility of the TB18 alloy without reducing its strength, resulting in optimal comprehensive mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Nana Chen, Hongchao Kou, Zhihong Wu, Fengming Qiang, Chuanyun Wang, Jinshan Li, J. M. Molina-Aldareguia
Summary: The Ti-7333 alloy deforms predominantly by stress-induced martensitic (SIM) and SIM alpha '' twinning, with the prevalence of {130}<310>(alpha '') compound twinning attributed to the comparatively small shear and simple shuffle mechanism. Different twinning modes are activated during deformation stages, leading to the development of a hierarchical microstructure responsible for the high work hardening displayed by the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Shun Guo, Wang Ding, Huihui Zhang, Weiqun Lu, Guanglei Liu, Haixia Liu, Xiaonong Cheng, Xinqing Zhao
Summary: In this study, a Ti-Nb alloy with large near-linear recoverable strain was designed to investigate the physical mechanisms responsible for high near-linear elastic deformability. The experimental results showed that the high near-linear elastic deformability of this alloy is attributed to a combined effect of large inherent elastic deformation and a reversible SIMT.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
X. Huang, J. S. Li, M. J. Lai
Summary: The influences of grain size on the deformation behavior of a metastable beta-type Ti-12Mo (wt%) alloy were investigated through uniaxial tensile testing, scanning electron microscopy, and electron backscatter diffraction. The results showed that the alloy exhibited twinning-induced plasticity (TWIP) effect and significant work hardening behavior when the mean grain size ranged from 49 to 104 pm. However, when the alloy had heterogeneous grain structures and smaller grain sizes (d0 around 30 pm), the TWIP effect was absent and the alloy exhibited high yield strength but no work hardening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Peng Wang, Zhicheng Song, Qianqian Li, Hongtao Wang
Summary: This study investigates the cyclic deformation behaviors of dual-phase metastable high entropy alloy through molecular dynamics simulations, revealing that different cyclic loading patterns can dramatically modify the complex dislocation network structure and lead to cyclic growth and healing effects. As the minimum strain reduces, isolated dislocations are compressed and absorbed by phase boundaries, indicating a cyclic healing effect different from traditional cyclic straining hardening mechanisms in metals.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Materials Science, Multidisciplinary
Yong Li, David San Martin, Jinliang Wang, Chenchong Wang, Wei Xu
Summary: The study reviews the importance of the thermal stability of metastable austenite in the design of advanced high-strength steels, providing guidance for tailoring the stability of metastable austenite and achieving desirable microstructure. Both experimental and theoretical aspects are considered, discussing factors influencing thermal stability and reviewing kinetic models describing martensitic transformation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zhuo Chen, Liang Yang, Xinkai Ma, Qi Sun, Fuguo Li, Xiaotian Fang
Summary: The stability of BCC-beta phase significantly affects the mechanical properties of metastable beta titanium alloys. This study demonstrates that by controlling the volume fraction of the alpha phase, the stability of the beta phase and the stress-induced martensitic transformation can be tuned in a dual-phase metastable beta titanium alloy. The alloy with a 25.9 pct fraction of the alpha phase exhibits a good balance of strength and ductility.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Bingnan Qian, Lola Lilensten, Jinyong Zhang, Min Yang, Fan Sun, Philippe Vermaut, Frederic Prima
Summary: The diverse pathways of deformation-induced transformations in the beta-metastable Ti-12Mo alloy displaying combined TWIP were investigated via two different ways.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
D. G. Sangiovanni, F. Tasnadi, T. Harrington, M. Oden, K. S. Vecchio, I. A. Abrikosov
Summary: The study investigates the elastic moduli properties of refractory carbides at different temperatures through AIMD simulations. The results show that TaC exhibits the highest elastic resistance at high temperatures, while the (V, Nb, Ta, Mo, W) C system is suitable for applications requiring superior toughness at both room and elevated temperatures.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Ceramics
Mingde Qin, Qizhang Yan, Yi Liu, Haoren Wang, Chunyang Wang, Tianjiao Lei, Kenneth S. Vecchio, Huolin L. Xin, Timothy J. Rupert, Jian Luo
Summary: A group of CaB6-typed cubic rare earth high-entropy hexaborides have been successfully fabricated into dense bulk pellets with high microhardness and Young's moduli. The material's work functions were significantly higher than LaB6, as determined by ultraviolet photoelectron spectroscopy.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
William M. Mellor, Kevin Kaufmann, Olivia F. Dippo, Samuel D. Figueroa, Grant D. Schrader, Kenneth S. Vecchio
Summary: In the last decade, single-phase high-entropy materials have been of interest due to their unique properties. The recent development of 5-cation high-entropy carbides has demonstrated promising properties, and there is now a proposed development of ultrahigh-entropy carbides containing 6+ principal elements with greater combinatorial possibilities. The use of 6+ multi-cation compositions allows for ceramics with tunable properties and potentially higher orders of entropic stabilization.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Mingde Qin, Qizhang Yan, Haoren Wang, Kenneth S. Vecchio, Jian Luo
Summary: Six high-entropy rare earth tetraborides with tetragonal structure were synthesized successfully, expanding the family of high-entropy ceramics. The specimens, prepared using high-energy ball mill and in-situ reactive spark plasma sintering, exhibited high relative density and Vickers microhardness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Multidisciplinary Sciences
Kevin Kaufmann, Hobson Lane, Xiao Liu, Kenneth S. Vecchio
Summary: Transfer learning can accelerate the training of deep learning models and improve performance with limited data. In this study, a few-shot transfer learning approach is used to classify electron backscatter diffraction pattern images, demonstrating its applicability for real-world phase identification and differentiation.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Olivia F. Dippo, Davide G. Sangiovanni, Emma Wenger, Kenneth S. Vecchio
Summary: This work develops a method to tune and predict the color and pseudogap energy of Group 4 and 5 transition metal carbonitrides with B1-rocksalt structure. The relationship between color parameters, pseudogap energies, and electronic band structures is analyzed.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Xiao Liu, Kenneth Vecchio
Summary: By studying a thermo-mechanical processing method, the non-uniform as-cast microstructure was successfully transformed into a uniform recrystallized structure, leading to a significant improvement in the tensile strength of the alloy. Furthermore, by selecting the appropriate annealing temperature, significant improvements in ductility can also be achieved without compromising the high strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Xiao Liu, Cheng Zhang, Chaoyi Zhu, Kenneth Vecchio
Summary: This study reports the achievement of strength-ductility synergy in an Al-Cr-Fe-Co-Ni complex concentrated alloy through the utilization of a heterogeneous lamella structure. The materials were processed using a simple two-step thermo-mechanical processing route and showed significant enhancement in both strength and ductility. The mechanical properties can be tuned by changing the annealing time, and the multiphase lamella structure exhibits a stronger Bauschinger effect compared to other similar materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Cheng Zhang, Haoren Wang, Xinyi Wang, Qin Yu, Chaoyi Zhu, Mingjie Xu, Shiteng Zhao, Rui Kou, Xin Wang, Benjamin E. MacDonald, Roger C. Reed, Kenneth S. Vecchio, Penghui Cao, Timothy J. Rupert, Enrique J. Lavernia
Summary: A new class of non-equiatomic NbTaTi-based refractory high-entropy alloys (RHEAs) with excellent cold-workability and high strength at elevated temperatures has been reported. These RHEAs can be cold-rolled to a reduction of over 90% without any surface treatment or intermediate annealing. They also exhibit considerable ductility at cryogenic conditions, overcoming the traditional strength-ductility trade-off. This class of super-formable RHEAs provides a novel design pathway for energy- and time-saving fabrication of high-temperature structural materials.
Article
Materials Science, Multidisciplinary
Cheng Zhang, Qin Yu, Yuanbo T. Tang, Mingjie Xu, Haoren Wang, Chaoyi Zhu, Jon Ell, Shiteng Zhao, Benjamin E. MacDonald, Penghui Cao, Julie M. Schoenung, Kenneth S. Vecchio, Roger C. Reed, Robert O. Ritchie, Enrique J. Lavernia
Summary: This research reports on a non-equiatomic, heterostructured high-entropy alloy FeNiCoAlTaB that exhibits remarkable combinations of mechanical properties across a wide temperature range. The alloy achieves its behavior by activating multiple individual mechanisms at different temperatures, providing a methodology for designing and fabricating multifunctional high-entropy alloys.
Article
Nanoscience & Nanotechnology
Kevin Kaufmann, Emma Wenger, Kenneth Vecchio
Summary: The mechanical properties of rocksalt transition metal ceramics are strongly influenced by their valence electron concentration (VEC), with materials having VEC values between 9 and 10 generally exhibiting superior ductility and hardness. This study focuses on stabilizing Group-VIB carbides as room-temperature B1 structures through the addition of vanadium and correlating the VEC with nanoindentation measurements. The research thoroughly explores and verifies the minimum atom percent of vanadium required to form a single-phase B1 carbide using XRD, EDS, and EBSD techniques.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Xiao Liu, Kenneth Vecchio
Summary: Heterogeneous lamella (HL) structures were created in a FeCoNi-based complex concentrated alloy (CCA) with superalloy-like FCC/L1(2) microstructure through simple processing steps. Compared to the homogeneous-structured control specimens, the HL-structured specimens exhibited simultaneous improvements in strength and ductility (with s(y) up to 1 GPa, s(u) up to 1.4 GPa, and e(t) up to 16.5%), along with higher saturation magnetization and lower coercivity (with M-s up to 104 Am-2 kg(-1) and H-c as low as 833 A/m). This study provides insights on enhancing the mechanical properties of structural soft magnetic materials without compromising their magnetic properties.
MATERIALS RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Davide G. Sangiovanni, Kevin Kaufmann, Kenneth Vecchio
Summary: High-entropy carbides (HECs) have attracted considerable interest due to their high hardness and tunable mechanical and physical properties. The resistance to fracture of refractory HECs is correlated with their valence electron concentration (VEC).
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)
