Article
Chemistry, Physical
Josiah Cherian Chekotu, David Kinahan, Russell Goodall, Dermot Brabazon
Summary: This study successfully modeled the mechanical behavior of superelastic NiTi using the Auricchio finite element model and validated it with experimental data. Microscale studies revealed the influence of martensite phase transformation on the material's response. Additionally, the study found that porosity in laser powder bed fusion processes has macroscopic effects on structural stiffness, energy dissipation, and damping properties.
Article
Chemistry, Physical
Guoshun Qin, Chengguan Zhang, Shaobin Zhang, Xue Chen, Yongjun He
Summary: A bar of single crystal Ni-Mn-Ga shape memory alloy undergoes martensitic phase transformation through nucleation and propagation of Austenite-Martensite (A-M) interfaces. Near the A-M interface, very fine martensite twin laminates are generated due to the compatibility between the two phases. Observations on the specimen's deformation and the twin laminates reveal that the fine laminates after cooling are unstable and spontaneously transform into a single martensite variant, triggered by heating-cooling cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Joanna Kowalska, Janusz Rys, Grzegorz Cempura
Summary: The study on Fe-21.2Mn-2.73Al-2.99Si steel deformed at ambient temperature reveals the formation of hexagonal ε-martensite and gradually increasing cubic α′-martensite within its microstructure as deformation progresses. Both mechanical twinning and strain-induced phase transformations were found to contribute to the increase in mechanical properties of the steel.
Article
Materials Science, Multidisciplinary
Lei Cheng, Wei Yu, Ying Han, Zhicheng Cheng, Qingwu Cai
Summary: A herringbone martensite with three typical texture components was obtained through severe hot rolling and quenching process. The activated slip planes in the deformed prior austenite grains promoted the preferential transformation of herringbone martensite and the formation of martensitic textures. High-temperature tension tests showed that the herringbone martensite exhibited obvious fracture anisotropy and the plastic deformation behavior depended on the processing direction.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yue Dong, Xingang Liu, Junjie Zou, Yujiao Ke, Pengwei Liu, Lan Ma, Hengjun Luo
Summary: The control of post-forging cooling rate plays a crucial role in the industrial production process of titanium alloys. This study investigates the texture evolution and variant selection during the beta -> alpha transformation under different cooling rates. The results demonstrate that cooling rates significantly affect the grain size, variant types, and texture formation, providing important insights for the industrial production of near-beta titanium alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yue Dong, Xingang Liu, Haozhe Niu, Hao Xu, Yini He, Yujiao Ke, Wenwen Zhang
Summary: The crystallographic defects introduced after thermal deformation of near-beta Ti-55511 alloy have a significant influence on the precipitation of primary alpha phase (alpha(p)), beta grain evolution, and texture evolution during subsequent heat treatment. The study shows that the intragranular short-rod alpha(p) precipitated by strain-induced nucleation deviates from the Burgers orientation relationship (BOR) through boundary splitting, but strictly follows BOR during solidification and transformation. Furthermore, the type of alpha(p) can be modified by strain and strain rate. After solidification, alpha(p) varieties mainly include 80-90 degrees/<-12-10> and 80-90 degrees/<01-10>. The deformation texture density is weakened by the new alpha(p) transformation texture and recrystallization texture, but is partly inherited after solidification. Adjacent alpha(p) grains are mainly oriented at 60 degrees/<11-20>, while beta grains around highly recrystallized alpha(p) are mainly oriented at 30-50 degrees/<34x>. The static sphericalized alpha(p) is partly generated through coarsening and GB separation mechanisms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Dan-dan Ma, Ping Yang, Xin-fu Gu, Feng-E Cui
Summary: The thermally induced martensite can be effectively restrained by refining grains or introducing crystal defects, providing a nearly full austenite phase for the subsequent TRIP process. Fine-grained samples exhibit better plasticity and higher strength, while bimodal elongated-grained samples demonstrate the highest strength and sufficient plasticity due to the delay in martensitic transformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Chengguan Zhang, Guoshun Qin, Shaobin Zhang, Xue Chen, Yongjun He
Summary: Experiments on Ni-Mn-Ga single crystal shape memory alloy demonstrate significant differences in the twin laminate structure of the austenite-martensite interface between the forward and reverse phase transitions. After the cooling-induced austenite-martensite transition, the remaining twin laminate evolves into a single martensite variant.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
R. Young, J. Fuller-Thomson, H. Zurob, O. Bouaziz, A. Arlazarov
Summary: A first-order description of the formation of ε- and α'-martensite in Fe-Mn alloys has been developed, but accurate estimation of initial martensite amounts based solely on Mn content is not feasible due to the influence of microstructure features and processing conditions. The evolution of phase fractions during martensitic transformations can be calculated based on the initial volume fractions of martensite in the non-deformed material.
METALS AND MATERIALS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
S. J. Li, G. J. Hu, B. Jing, Q. Zhao, S. L. Su, M. Y. He, Z. Y. Wei, Y. Tian, C. D. Wang, D. H. Ping
Summary: The twinning structure in quenched Fe-C binary alloys was investigated using transmission electron microscopy. The density of twins increased with increasing carbon content. High carbon alloys exhibited a high density of twins, while noticeable detwinning occurred in low carbon alloys, resulting in a low density of twins.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Shuai Xu, Chenxin Gao, Namin Xiao, Haiming Zhang, Zhenshan Cui
Summary: In this study, the microstructure evolution of a near-alpha Ti alloy during the B ->alpha phase transformation was analyzed through thermo-mechanical operations, microstructure characterization, phase reconstruction, and crystal plasticity finite element method (CPFEM) modeling. It was found that the continuous dynamic re-crystallization (cDRX) of the B phase gradually replaces the discontinuous dynamic recrystallization (dDRX) of the alpha phase with increasing temperature or decreasing strain rate. The B phase transforms into the secondary alpha (alpha s) phase with a localized phase-transformed texture during the subsequent cooling process. Additionally, the low-angle grain boundary (LAGB) in the B phase weakens the anisotropic growth of alpha s grains and the preferential variant selection of the B ->alpha phase transformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Rama Srinivas Varanasi, Motomichi Koyama, Hiroyuki Saitoh, Reina Utsumi, Toyoto Sato, Shin-ichi Orimo, Eiji Akiyama
Summary: The phase transformations and microstructure changes during the depressurization of non-hydrogenated and hydrogenated Fe-Mn-Si-Cr alloy were investigated. Understanding the effects of hydrogenation on the stability of the austenite phase in Fe-based alloys is crucial.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Ali Ameri, Hongxu Wang, Zongjun Li, Zakaria Quadir, William D. A. Rickard, Manny Gonzalez, Paul J. Hazell, Juan P. Escobedo-Diaz
Summary: Microstructural changes and ferrite phase transformation under shock loading between 8.5 GPa and 17.5 GPa in a hot-rolled Lean Duplex Stainless Steel were investigated, revealing a reversible phase transformation in ferrite at a peak stress of around 17 GPa, leading to a considerable increase in yield stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Computer Science, Artificial Intelligence
Hendrik Hotz, Benjamin Kirsch, Jan C. Aurich
Summary: Machining metastable austenitic stainless steel with cryogenic cooling induces a deformation-induced phase transformation from gamma-austenite to alpha'-martensite in the subsurface, resulting in higher microhardness and improved fatigue and wear resistance. Increasing passive forces and cutting forces promote the phase transformation, while higher temperatures inhibit it, with feed force having no significant influence. Proposed models allow for estimating alpha'-martensite content during cryogenic turning using in-situ measurement of process forces and temperatures.
JOURNAL OF INTELLIGENT MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
G. Bharat Reddy, Rajeev Kapoor, Apu Sarkar
Summary: This study demonstrates and explains the influence of beta phase texture on the alpha phase texture during the hot deformation of a Zr alloy in the two-phase field. The presence of beta-Zr and temperature both promote the development of the (2110) texture in alpha-Zr.
Article
Nanoscience & Nanotechnology
Hekang Zhu, Tingting Yang, Pui-Kit Lee, Zijia Yin, Yu Tang, Tianyi Li, Leighanne C. Gallington, Yang Ren, Denis Y. W. Yu, Qi Liu
Summary: A facile method is developed to synthesize porous Ni-rich materials, which exhibit high capacity and stability as cathode materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Binghao Zhang, He Zhu, Yang Ren, Hekang Zhu, Weitong Lin, Ji-Jung Kai, Tianyi Li, Leighanne C. Gallington, Jincan Ren, Yalan Huang, Si Lan, Xiaopeng Tang, Qi Liu
Summary: The lifespan of lithium-ion batteries is influenced by unpredictable and complicated operation conditions. This study shows that the pause during charging-discharging process can cause significant capacity drop and reactivates harmful phase transition, leading to performance degradation. The discontinuous usage of rechargeable batteries is identified as a key factor for cycle life.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Yuhai Qu, Xiaoming Sun, Wanyuan Gui, Runguang Li, Zhihua Nie, Zhiyong Gao, Wei Cai, Yang Ren, Yandong Wang, Daoyong Cong
Summary: Magnetic-field-induced first-order magnetostructural transition (MFI-FOMST) has various magnetoresponsive effects, but practical applications have been limited by the high critical field. In this study, we achieved complete and reversible MFI-FOMST under a low field of 1.5 T in a prototype shape memory alloy. This was made possible by enlarging the distance between Curie transition and magnetostructural transition and manipulating the geometric compatibility between phases. The low critical field provides opportunities for low-field-induced large reversible magnetoresponsive effects and practical applications of MSMAs.
Article
Chemistry, Multidisciplinary
Shitong Wang, Lijiang Zhao, Yanhao Dong, He Zhu, Yang Yang, Haowei Xu, Baoming Wang, Yakun Yuan, Yang Ren, Xiaojing Huang, Wei Quan, Yutong Li, Yimeng Huang, Charles M. Settens, Qi He, Yongwen Sun, Hua Wang, Zunqiu Xiao, Wenjun Liu, Xianghui Xiao, Riqiang Fu, Qiang Li, Yong S. Chu, Zhongtai Zhang, Qi Liu, Andrew M. Minor, Junying Zhang, Zilong Tang, Ju Li
Summary: Wadsley-Roth oxides (WROs) with pore diameters of 2.5 angstrom < d < 2.8 angstrom allow rapid diffusion of Li+ in single-crystal particles, enabling high-rate charge cycles similar to gasoline vehicles and improving the cycle life up to 10,000 cycles.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Ceramics
Abhijit Pramanick, Laurent Daniel, Sarangi Venkateshwarlu, Valentin Segouin, Yang Ren
Summary: Through experimental and modeling results, we have discovered a unique tetragonal-to-orthorhombic-to-tetragonal phase transformation induced under low electric fields (< 1 kV/mm) in grains with 002 crystallographic poles oriented either within 20 degrees or orthogonal to the applied electric-field direction in a polycrystalline Pb-free piezoceramic. In contrast, grains with their 002 poles oriented 30 degrees- 80 degrees to the electric-field direction undergo a continuous tetragonal-to-orthorhombic transformation for electric fields larger than 1 kV/mm. These findings highlight the critical role of a phase-transition-assisted domain switching mechanism in grains of specific orientations towards achieving a large electrostrain coefficient of d(33)* similar to 600 pm/V under low electric fields (< 1 kV/mm) in the Pb-free Sn-doped (Ba,Ca)(Zr,Ti)O-3 piezoceramic.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Yingchao Li, Junsong Zhang, Martin Saunders, Yang Ren, Hong Yang, Yinong Liu
Summary: By utilizing the principles of lattice strain matching and collective atomic load transfer, ultralarge elastic strains were induced in a brittle NiTi-Nb3Sn eutectic composite, where Nb3Sn lamellae achieved a remarkable elastic lattice strain of -2.4%. This study both tests the applicability of lattice strain matching in brittle materials and explores a novel fabrication approach for in-situ composites via eutectic solidification.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Green & Sustainable Science & Technology
Chongyin Yang, Jiale Xia, Chunyu Cui, Travis P. Pollard, Jenel Vatamanu, Antonio Faraone, Joseph A. Dura, Madhusudan Tyagi, Alex Kattan, Elijah Thimsen, Jijian Xu, Wentao Song, Enyuan Hu, Xiao Ji, Singyuk Hou, Xiyue Zhang, Michael S. S. Ding, Sooyeon Hwang, Dong Su, Yang Ren, Xiao-Qing Yang, Howard Wang, Oleg Borodin, Chunsheng Wang
Summary: The global electrification of transportation and the increasing demand for grid energy storage are driving the growth of batteries worldwide. However, the supply chain of Li-ion batteries is facing challenges in sourcing essential and scarce materials. Therefore, there is a growing incentive to develop more sustainable battery chemistries.
NATURE SUSTAINABILITY
(2023)
Review
Materials Science, Multidisciplinary
Jie Yan, Weixia Dong, Peijian Shi, Tianyi Li, Wenjun Liu, Yan-Dong Wang, Xun-Li Wang, Yuntian Zhu, Yang Ren
Summary: Heterostructured materials (HSMs) have the potential to break the strength-ductility tradeoff, but understanding their deformation physics and strengthening mechanisms is challenging due to their complex structures. Synchrotron x-rays provide powerful techniques for studying HSMs at different length scales. This article introduces in situ high-energy x-ray diffraction and Laue x-ray microdiffraction techniques and their application in studying stress partitioning, phase transformations, and deformation microstructures in HSMs.
Article
Materials Science, Multidisciplinary
Xiaoxu Guo, Yang Ren, Yongmei M. Jin, Yu U. Wang
Summary: A quasi-spin Ising model is used to simulate thermoeleastic martensitic transformation at the atomic scale. The model characterizes the orientation variants of the martensite phase and their interactions through long-range elastic interactions. The study focuses on the behavior of a defect-free crystal undergoing cubic-to-tetragonal martensitic transformation. The simulation shows that the diffuse scattering in the pre-martensitic austenite state is a result of the spatial correlation of atomic-scale heterogeneous lattice displacements and exhibits displacement short-range ordering. The effects of temperature, elastic anisotropy, and shear modulus softening on diffuse scattering and displacement short-range ordering are investigated.
SHAPE MEMORY AND SUPERELASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Tangqing Cao, Qian Zhang, Liang Wang, Lu Wang, Yao Xiao, Jiahao Yao, Huaiyi Liu, Yang Ren, Jun Liang, Yunfei Xue, Xiaoyan Li
Summary: High-entropy alloys (HEAs) possess unique microstructures and chemical compositions, resulting in remarkable mechanical properties. In this study, the mechanical behaviors and deformation mechanisms of CoCrFeNi HEAs under dynamic loading were investigated through experiments and simulations. The results showed significant strain rate sensitivity and strain-hardening capability of CoCrFeNi HEAs at high strain rates. The findings shed light on the design and fabrication of HEAs with excellent dynamic mechanical properties.
Article
Engineering, Multidisciplinary
Xiangguang Kong, Ying Yang, Yang Ren, Lishan Cui, Shijie Hao
Summary: This study examined the deformation behavior in Nb nanoparticle-martensitic NiTi composite wire under tensile loading using in-situ high-energy X-ray diffraction. The presence of dispersed Nb nanoparticles had minimal impact on the transformation and deformation behavior of the NiTi matrix, resulting in the absence of R phase transformation and the occurrence of deformation twinning in the NiTi matrix. Deformation twinning in the NiTi matrix reduced the shape strain caused by unfavorable orientated martensite variants and decreased the internal stress among NiTi martensite variants during the martensite reorientation process. Additionally, TEM results confirmed that Nb nanoparticles achieved a large elastic strain in the B19' -NiTi matrix (-4%), similar to Nb nanowires, but this strain was released with the occurrence of NiTi deformation twinning.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Shengbiao Zhang, Peijun Hou, Jiyun Kang, Tianyi Li, Shahryar Mooraj, Yang Ren, Catherine H. Chen, A. John Hart, Simos Gerasimidis, Wen Chen
Summary: As transportation infrastructure ages, repairing damaged structures like steel bridges becomes increasingly important. This study developed a laser-based additive manufacturing method for repairing corroded beams in steel bridges. The promising potential of employing additive manufacturing for structural repair was shown, along with fundamental insights into the relationships between processing, structure, and properties in laser additive manufacturing-repaired materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yanming Sun, Yili Cao, Shixin Hu, Maxim Avdeev, Chin-Wei Wang, Sergii Khmelevskyi, Yang Ren, Saul H. Lapidus, Xin Chen, Qiang Li, Jinxia Deng, Jun Miao, Kun Lin, Xiaojun Kuang, Xianran Xing
Summary: By high-temperature synthesis, researchers have achieved tunable thermal expansion in the kagome cubic (Fd-3m) intermetallic (Zr,Nb)Fe-2 materials. By magnetic doping, they have obtained a near-zero thermal expansion coefficient, which has significant applications in advanced technologies.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Fan Xue, Qiang Li, Mingxin Lv, Yuanfei Song, Tianxing Yang, Xiaoge Wang, Tianyi Li, Yang Ren, Koji Ohara, Yufei He, Dianqing Li, Qiheng Li, Xin Chen, Kun Lin, Xianran Xing
Summary: This study reports the local structure of Pd nanocatalysts, revealing the atomic surface distribution of unique compressed strain in Pd nanocatalysts. The surface strain, induced by the shape of the catalyst, significantly weakens the adsorption energy of ethylene and avoids the over-hydrogenation of acetylene, leading to higher selectivity for ethylene.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Yao Gu, Zhongzheng Yao, Sinan Liu, Huiqiang Ying, Chenyu Lu, Zhenduo Wu, Yang Ren, Jun-ichi Suzuki, Zhenhua Xie, Yubin Ke, Jianrong Zeng, He Zhu, Song Tang, Xun-Li Wang, Si Lan
Summary: Fe-based metallic glasses are promising materials in the fields of advanced magnetism and sensors. This study proposes a novel approach to tailor the amorphous structure through liquid-liquid phase transition, and provides insights into the correlation between structural disorder and magnetic order. The results show that the liquid-liquid phase transition can induce more locally ordered nanodomains, leading to stronger exchange interactions and increased saturation magnetization. The increased local heterogeneity also enhances magnetic anisotropy, resulting in a better stress-impedance effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)