Article
Nanoscience & Nanotechnology
Jie Fu, Hee Young Kim, Shuichi Miyazaki
Summary: This study demonstrates that adding nitrogen can help achieve a superior combination of high strength and ultra-low modulus in Ti-Zr based alloys. The addition of nitrogen facilitates the formation of nano-sized lattice modulation structure and impedes stress-induced martensitic transformation, resulting in higher apparent yield stress and non-linear elasticity in the alloy.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Xinkai Ma, Zhuo Chen, Lei Xiao, Shifeng Luo, Wenjie Lu
Summary: In this study, the compressive deformation behavior of a beta solution treated Ti-1023 alloy was analyzed at room temperature. The results revealed that stress-induced martensitic transformation dominated the compressive deformation process, with different strain rates leading to varying work hardening rates and triggering stresses. Additionally, novel deformation mechanisms of alpha '' martensite, such as {111}(α'') twinning and kinking structure, were observed during the compression deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
S. Pilz, A. Hariharan, F. Guenther, M. Zimmermann, A. Gebert
Summary: This study reveals the influence of omega iso precipitates on the deformation mechanisms and mechanical properties of a biomedical beta-type Ti-40Nb alloy. The results show that the fraction and size of omega iso increased with increasing aging time, leading to an increase in Young's modulus and proof stress. The active deformation mechanisms also changed with aging time, resulting in significant alterations in mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Peng Wang, Yu Cao, Daoxuan Zhou, Ming Li, Kun Jiang, Haofei Zhou, Ping Qu, Hongtao Wang
Summary: In this study, molecular dynamic simulations were used to analyze the martensitic transformation and complex dislocation activities of commercial Ti80 alloy. The simulation results showed good agreement with experimental observations and provided valuable insights into the deformation mechanisms of Ti80 alloy and related Ti alloys. The findings and newly developed interatomic potential can guide the development of high-performance Ti alloys in the future.
MECHANICS OF MATERIALS
(2023)
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
Xiangyu Shi, Ruirui Gao, Jianqiang Li, Tongyou Lu, Hongzhi Luo
Summary: The effects of Bi-doping on the electronic structure, martensitic transformation, and magnetic properties of Heusler alloys ni2MnGa1-xBix and Mn2NiGa1-xBix were investigated. It was found that Bi-doping has a negative effect on the martensitic transformation and can lower the transformation temperature. The increase in electron concentration and cell volume with Bi-doping may be the reason for this effect. Additionally, Bi-doping has no effect on the magnetic structure of the alloys.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhen Chen, Daoyong Cong, Yang Ren, Yin Zhang, Haile Yan, Li You, Chao Song, Shaohui Li, Yuxian Cao, Shengwei Li, Changchang Zuo, Li Wang, Zhiyong Gao, Wei Cai, Yandong Wang
Summary: In this study, a high-performance, cost-effective high-temperature shape memory microwire with exceptional superelasticity, one-way and two-way shape memory effects has been developed using the strategy of creating an oligocrystalline structure. This microwire shows great potential for high-temperature actuation, sensing, and energy conversion applications.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaolan Yang, Jiaxiang Shang
Summary: The study found that the lattice parameters of Ti-Ni-Pt alloys continuously increase with increasing Pt content. Below 12.5% Pt, the most stable martensite structure is monoclinic B19' phase with the minimum energy difference observed at 6.25% Pt, while around 15% Pt, the orthorhombic B19 structure becomes the most stable martensite phase with a sharp increase in energy difference.
APPLIED SCIENCES-BASEL
(2021)
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
Nanoscience & Nanotechnology
Abhishek Rastogi, Suresh Neelakantan
Summary: In this study, stress-induced martensitic transformation (SIMT) has been effectively demonstrated to achieve a significant cold reduction of -43% and -45% in the metastable Ti-10V-2Fe-3Al and Ti-5Al-5V-5Mo-3Cr alloys, respectively. The presence of stress-induced alpha '' martensites provides preferential nucleation sites for new strain-free grains formation upon recrystallization annealing. Thermomechanical treatment results in a grain refinement of -93% and -80% for Ti-1023 and Ti-5553 alloys, respectively. The diffusivities of alloying elements, such as Fe, Mo, V, Cr, and Al, have been confirmed to alter the stability of the fl phase during recrystallization annealing, as evidenced by Electron Probe Micro Analyzer (EPMA). The effect of grain size on the SIMT ability based on microhardness variations has also been deduced.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
L. X. Wang, S. Xiang, Y. B. Tan, W. Shi, Y. Q. Cai, X. M. Ji
Summary: In this study, the 9R structure was successfully obtained by adjusting the stacking fault energy. The interfacial synergism derived from the FCC and 9R structures was found to lower the cohesive energy and enhance stability. Additionally, the 9R structure provides more HCP phase nucleation cores and enhances the TRIP effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Asaf Dana, Emil Bronstein, Eilon Faran, Veijo Honkimaki, Klaus-Dieter Liss, Doron Shilo
Summary: The martensitic transformation in shape memory alloys is known to be very fast. However, its rate in bulk materials that serve in common actuator applications is still an open question. In this study, the researchers induced the martensitic transformation in a polycrystalline NiTi shape memory alloy wire using a high-voltage microsecond superheating pulse, and tracked its rate using time-resolved X-ray diffraction. They found that the transformation rate follows the rate of heating, completing most of the process within approximately 1 µs, but a part of the transformation continues at much slower time scales of several tens of microseconds.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Hui Liu, Jinzhi Li, Weiji Lai, Xueyang Zhao, Wei Li, Xiaojian Wang
Summary: Novel (Ti-xZr)-2Mn-2Mo (TZMM) alloys were designed to develop biomedical shape memory alloys with high biocompatibility. The microstructure, shape memory effect, and martensitic transformation behavior of the TZMM alloys were investigated. The experimental results showed that the TZMM alloys were mainly composed of a single beta phase before plastic deformation, and stress-induced alpha '' phase appeared after strain loading. The (TZ)5:1MM alloy with a favorable {001}(beta)(beta) recrystallization texture exhibited the optimal shape memory effect within the TZMM alloys, while an increase in Zr content impaired the shape memory effect of the alloys by increasing the beta phase stability.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Liang Cheng, Shuaijin Zhang, Guang Yang, Hongchao Kou, Emmanuel Bouzy
Summary: This study achieved microstructure and mechanical properties adjustment of a beta-solidifying TiAl alloy through martensitic transformation, resulting in two different microstructures with distinct mechanical properties, suitable for high temperature service and thermomechanical processing, respectively.
MATERIALS CHARACTERIZATION
(2021)
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
Chemistry, Physical
H. Z. Yu, J. H. Dai, Y. Song
APPLIED SURFACE SCIENCE
(2015)
Article
Chemistry, Physical
Li Xiong, Jianhong Dai, Yan Song, Guangwu Wen, Chunlin Qin
APPLIED SURFACE SCIENCE
(2016)
Article
Chemistry, Physical
Jianhong Dai, Yuying Chen, Ruiwen Xie, Zhou Hu, Yan Song
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2016)
Article
Chemistry, Physical
Li Xiong, Jianhong Dai, Yan Song, Guangwu Wen, Chunlin Qin
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Chemistry, Physical
Yuying Chen, Jianhong Dai, Ruiwen Xie, Yan Song
Article
Chemistry, Physical
J. H. Dai, X. W. Jiang, Y. Song
Article
Chemistry, Physical
Jianhong Dai, Yan Song
Article
Chemistry, Multidisciplinary
Jianhong Dai, Yan Song
Article
Chemistry, Multidisciplinary
J. H. Dai, Y. Song, L. Xia, W. G. Wang
Article
Chemistry, Multidisciplinary
Jianhong Dai, Yan Song
Article
Chemistry, Physical
J. H. Dai, Y. Song, R. Yang
Article
Chemistry, Multidisciplinary
M. Bououdina, S. Azzaza, R. Ghomri, M. Nasiruzzaman Shaikh, J. H. Dai, Y. Song, W. Song, W. Cai, M. Ghers
Article
Materials Science, Multidisciplinary
Y. Li, J. H. Dai, Y. Song
COMPUTATIONAL MATERIALS SCIENCE
(2020)
Article
Chemistry, Physical
Q. D. Chen, S. F. Yuan, J. H. Dai, Y. Song
Summary: First-principles calculations were used to study the electrochemical performance of M2TiC2 and M2TiC2Tx as anode materials for sodium ion batteries. O-functionalized MXenes showed higher stability and theoretical storage capacities compared to F and OH terminations, despite hindering sodium diffusion. The diffusion performance of sodium in MXene materials is mainly affected by the functional groups, while interactions between terminations have little effect.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
J. H. Dai, B. Shi, Z. Z. Hu, H. Y. Quan, Y. Song
COMPUTATIONAL MATERIALS SCIENCE
(2017)