Article
Materials Science, Multidisciplinary
Xinglong An, Wenting Jiang, Song Ni, Zibin Chen, Zhangwei Wang, Min Song
Summary: The origin of {332} <113> twinning and twin-twin intersections in a shock load metastable beta Ti-12Mo alloy were investigated in this study. Direct observation revealed the twinning mechanism to be beta -> alpha'' -> alpha T-{130}'' -> beta({332}T), filling the gap in understanding the stress induced alpha'' phase and alpha'' twinning behavior. Three types of twin-twin intersections were observed, including retaining alpha'' phase, secondary {332} <113> twinning, and formation of kink bands in the intersecting areas.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Kai Yao, Xiaohua Min
Summary: This study systematically clarifies the instantaneous strain rate sensitivity (ISRS) and strain rate sensitivity of strain hardening (SRSS) in the {332} < 113 > Ti-15Mo alloy exhibiting TWIP effect. The results show that ISRS is positively correlated with the change in the dislocation activation volume, while SRSS is negatively correlated with the evolution of deformation microstructures.
Article
Materials Science, Multidisciplinary
Yi Yang, Bohua Zhang, Zhichao Meng, Lei Qu, Hao Wang, Sheng Cao, Jianan Hu, Hao Chen, Songquan Wu, Dehai Ping, Geping Li, Lai-Chang Zhang, Rui Yang, Aijun Huang
Summary: The study examines the impact of twinning transfer behavior on the twin shape in a beta-type Ti-23.1Nb-2.0Zr-1.0O Ti alloy, finding that the crystallographic alignment factor and misorientation angle of grain pairs play a crucial role. The occurrence or non-occurrence of twinning transfer determines whether the twins have a ruler shape or a lenticular shape, providing effective mechanisms to reduce stress concentration.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Alexandru Dan, Elisabeta Mirela Cojocaru, Doina Raducanu, Anna Nocivin, Ion Cinca, Vasile Danut Cojocaru
Summary: This study investigates the activation of {332} and {112} twin variants in a Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe alloy during cold-rolling, revealing the presence of twinning even at low deformation degrees and the activation of different twinning systems at higher deformation degrees.
Article
Materials Science, Multidisciplinary
P. Kwasniak, F. Sun, S. Mantri, R. Banerjee, F. Prima
Summary: The novel TWIP/TRIP titanium alloys exhibit unprecedented mechanical properties controlled by {332} <113> twinning and stress-induced martensitic transformation, whose atomic-scale mechanism is still unclear. Through ab initio calculations and experiments, the authors show that {332} <113> twinning can be described as a polymorphic solid-state transformation that produces twinned or martensitic structures, with a unified transformation path influenced by beta phase stability.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Yu Zhang, Xiao Li, Renlong Xin, Shewei Xin, Qing Liu
Summary: This study aimed to understand the cross-boundary behavior of {332}(113) twinning in a metastable Ti-15Mo alloy and found that non-Schmid twins might be promoted by the cross-boundary behavior. It was also discovered that CSF is more effective than SF for twin variant prediction in Ti-15Mo alloy. Furthermore, the influence of boundary angle on twinning transfer behavior was revealed based on CSF analysis.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Kai Yao, Xiaohua Min
Summary: This study investigated the effect of grain size on the tensile properties of Ti-15Mo alloy, revealing that the impact decreased with increasing strain and eventually became negative. A dynamic Hall-Petch relation was established based on effective grain size, showcasing twin activation, twin suppression, and various interactions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Lixia Ma, Min Wan, Weidong Li, Jie Shao, Xiaoning Han, Jichun Zhang
Summary: This study systematically investigated the superplastic deformation microstructure evolution and mechanism of the new near-alpha TNW700 titanium alloy at different strain rates and true strains. Results showed that the alloy exhibited excellent superplastic behavior within a certain strain rate range, with decreasing peak stress and significant strain hardening followed by flow softening. Electron backscatter diffraction and high resolution transmission electron microscopy were used to characterize the microstructure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Lola Lilensten, Fan Sun, Azziz Hocini, Guy Dirras, Philippe Vermaut, Frederic Prima
Summary: The cyclic shear study reveals the formation of conventional {332} 113 113 systems favorable to backward stress in the microstructure of Ti-15Mo (wt.%) alloy with twinning induced plasticity deformation mechanism. The trace analysis and calculation of the resolved shear stress on the considered twinning systems help rationalize the formation of various deformation products.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Min-Su Lee, A-Ra Jo, Sun-Kwang Hwang, Yong-Taek Hyun, Tea-Sung Jun
Summary: The study investigates the influence of strain rate and crystallographic texture on the hardening behavior and ductility of commercially pure titanium plate. Lower strain rate and cryogenic temperature lead to improved elongation and strain hardening, with a more significant effect observed at low temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Lixia Ma, Min Wan, Weidong Li, Jie Shao, Xuepiao Bai, Jichun Zhang
Summary: Research on the high temperature titanium alloy TNW700 revealed significant work hardening behavior, with varying trends in work hardening coefficient and critical strain between flow hardening and softening with respect to strain rate and deformation temperature. The alloy showed excellent superplasticity at 900-950 degrees C but poor superplasticity at 975 degrees C. The study on superplasticity is crucial for optimizing the forming process of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Liangxue Zhang, Qingsong Pan, Lei Lu
Summary: Gradient dislocation cell structured Al0.1CoCrFeNi high-entropy alloys show exceptional strength and ductility, different from traditional ultrafine-grained structures. The additional strain hardening behavior induced by the gradient is clarified by comparing the mechanical behavior of homogeneous and gradient samples.
MATERIALS RESEARCH LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Wenke Wang, Wenzhen Chen, Jaimyun Jung, Chao Cui, Peng Li, Jianlei Yang, Wencong Zhang, Renlong Xiong, Hyoung Seop Kim
Summary: This study investigates the evolution of asymmetry in microstructure and plastic deformation behavior in AZ31 magnesium alloy during tension and compression. The results show that there is a large yield stress asymmetry at the beginning of plastic deformation, but this asymmetry slightly increases and then gradually decreases with the increase of plastic strain. The asymmetry variation is attributed to the evolution asymmetry of microstructure. The experiment and VPSC model reveal that tension deformation triggers the development of a specific texture, while compression deformation leads to a different texture. Additionally, the deformation mechanism and geometry contribute to the decline of flow stress asymmetry.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jongun Moon, Olivier Bouaziz, Hyoung Seop Kim, Yuri Estrin
Summary: Deformation-induced twinning was used as a strengthening mechanism in a thermomechanical treatment for a high-entropy alloy, resulting in improved mechanical properties, especially in strain hardening ability, at room temperature.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Xinkai Ma, Jiahao Li, Zhuo Chen, Junye Li, Xiaojun Zhao, Fuguo Li
Summary: In this study, the dynamic tensile deformation behavior and microstructural evolution of a metastable beta titanium alloy (Ti-10 V-2Fe-3Al, Ti-1023) with a single beta phase structure were investigated. The results showed that the dynamic tensile properties and work hardening ability of the alloy exhibited a significant strain rate dependence, and microstructural analyses revealed that the deformation mechanisms and phase transformations played important roles in the work hardening behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Zihang Liu, Naoki Sato, Weihong Gao, Kunio Yubuta, Naoyuki Kawamoto, Masanori Mitome, Keiji Kurashima, Yuka Owada, Kazuo Nagase, Chul-Ho Lee, Jangho Yi, Koichi Tsuchiya, Takao Mori
Summary: Researchers have made significant advancements in thermoelectric materials by adding minor amounts of Cu to the Mg3Sb1.5Bi0.5 system, leading to improved thermoelectric performance and reduced thermal conductivity. Through grain-boundary engineering, the detrimental effects of thermally activated electrical conductivity were successfully eliminated. The fabricated thermoelectric module, when combined with a p-type alpha-MgAgSb-based material, showed promising potential for low-temperature thermoelectric harvesting.
Article
Chemistry, Physical
Fabien Briffod, Liu Hanqing, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: A layered alpha/beta Ti alloy was developed by cold rolling and aging of a metastable beta Ti-12Mo alloy, where alpha phase selectively precipitated at twin boundaries following a fixed crystallographic orientation relationship. The presence of α martensite inside thick twins and omega phase formed during cold rolling led to the dispersed alpha precipitate in the matrix. The deformation behavior of aged sample showed an increase in yield strength, with plastic deformation mainly occurring in the alpha layer at the interface between the matrix and thick twins.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Fumiyoshi Yoshinaka, Takahiro Sawaguchi, Susumu Takamori, Satoshi Emura
Summary: This study investigates the mechanisms of TRIP-enhanced ductility by analyzing the tensile deformation microstructure of Fe-15Mn-10Cr-8Ni-4Si alloy. The study found that there are three different TRIP mechanisms, including γ->ε, ε->α', and reverse ε->γ transformations, which play important roles in the excellent ductility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hanqing Liu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: This study investigates the deformation behaviors of Mg-Y-Zn alloys and Ti-12Mo alloy with mille-feuille-like structure using acoustic emission (AE) methods combined with supervised and unsupervised machine learning. In the supervised learning process, AE signals from compression tests were used to build a classification model. In the unsupervised learning process, AE signals were divided into two clusters based on frequency spectrum features for further analysis.
MATERIALS TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Dong-Hyun Lee, Zhe Gao, Jeong-Min Park, Yakai Zhao, Jin-Yoo Suh, Eric A. Jagle, Koichi Tsuchiya, Upadrasta Ramamurty, Jae-il Jang
Summary: The significant strengthening of SLM 304L stainless steel after high-pressure torsion treatment is mainly attributed to the synergistic combination of grain refinement and martensitic transformation. In the nanocrystalline regime, the dominance of grain boundary-mediated plasticity retards martensite-induced hardening.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: The mechanisms of fatigue crack initiation and propagation were investigated in a forged Ti-6Al-4V alloy with a bimodal microstructure. The study found that transgranular crack initiations occurred on both basal and prismatic planes in grains with high plastic activity. Intergranular crack initiations were found in pairs of grains sharing the same basal plane. Short crack propagation was transgranular and crystallographic on either basal or prismatic plane depending on the microtextured regions they belong. The presence of a macrozone was not necessary for crack initiation but appeared necessary for its propagation.
Article
Nanoscience & Nanotechnology
Junyu Zhu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: The plastic deformation behavior of an alpha/beta two-phase Ti-10Cr alloy with fine lamella microstructure was investigated. The crystallographic and kinematical relationships among the formed deformation bands were clarified through the analysis of the crystallographic relationship between the matrix, the twin, and the precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hidetoshi Somekawa, Jangho Yi, Hiromi Takahashi, Takanobu Hiroto, Koichi Tsuchiya
Summary: Experimental studies have revealed that many cavities are formed at grain boundaries and grain boundary triple junctions of fine-grained magnesium specimens during plastic deformation at room temperature, and the size and density of these cavities increase with the progression of deformation. The majority of cavities are controlled by plasticity, and their growth rate is similar to those observed in superplastic magnesium alloys tested at elevated temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Fumiyoshi Yoshinaka, Takahiro Sawaguchi, Susumu Takamori, Satoshi Emura, Yasuhiko Inoue
Summary: A bidirectional transformation mechanism (B-TRIP) between gamma-austenite and epsilon-martensite has been utilized to develop fatigue-resistant steel with high reversibility in dislocation motion. By modifying the Fe-15Mn-11Cr-7.5Ni-4Si steel, the Fe-18Mn-11Cr-7.5Ni-4Si B-TRIP steel was designed and showed a two-fold improvement in fatigue life compared to the previous steel. Microstructural analysis revealed that the enhanced irreversible alpha'-martensitic transformation in the previous steel negatively affected the durability of B-TRIP.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Junyu Zhu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki, Satoshi Emura
Summary: A combination of experimental and numerical studies was conducted to understand the microstructure and formation mechanism of kink bands in alpha/beta two-phase titanium alloys. Deformation kink bands were introduced in a Ti-9Cr alloy, and the strength changes of the alpha and beta phases inside and outside the kink band were evaluated. Microstructural examination and crystallographic analysis revealed the presence of prismatic slip during compression, and a crystal plasticity finite element model was developed to reproduce the {110}beta-rotation-type kink bands.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Baozhen Jiang, Doudou Men, Satoshi Emura, Koichi Tsuchiya
Summary: The aged Ti-5Al-5Mo-5V-3Cr alloy processed by high-pressure torsion (HPT) exhibits different flow behaviors for the acicular precipitates and matrix, which greatly affect the grain refinement process. After 100 revolutions of HPT processing, the microstructure and microhardness homogenization is achieved slowly, and the refinement may be enhanced by the acicular precipitates. The HPT processing produces an ultrafine microstructure with a grain size below 50 nm and a high dislocation density, resulting in a bell-shaped curve of microhardness evolution.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Digvijay Singh, Wataru Tasaki, Fumiyoshi Yoshinaka, Susumu Takamori, Satoshi Emura, Koichi Tsuchiya, Takahiro Sawaguchi
Summary: Researchers investigated the complex phase structures at the ε-ε intersection induced by deformation-induced martensitic transformation in austenitic steels. By compressing a single crystal of 316 austenitic stainless steel at a cryogenic temperature, they revealed the orientation relationships between the γ/ε/α' phases using electron backscattered diffraction analysis. The findings provide important insights for understanding this phase transformation process.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Chemistry, Physical
Motoharu Imai, Kwangsik Han, Mitsuaki Nishio, Takeshi Kato, Satoshi Kawada, Satoshi Emura, Taichi Abe, Hiroshi Fujihisa
Summary: Cubic SrSi2 is a potentially significant material in thermoelectricity and material science. However, its physical properties have not been thoroughly examined. This study investigates the Sr-Si phase diagram at different silicon content and identifies two intermetallic compounds and two eutectic reactions within the Si content range of 55-100 at%. Additionally, the study presents the crystal structure of the newly discovered SrSi2-X compound.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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)
