Article
Nanoscience & Nanotechnology
Yunhe Zheng, Laure Bourgeois, Jian-Feng Nie
Summary: This study investigated the structure of precipitates in Mg-Zn-Al alloys, revealing new structural features and proposing that the rod-shaped precipitates can be described by tiling of different shapes.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Katarzyna Stan-Glowinska, Amelia Zieba, Lukasz Rogal
Summary: This study investigates the microstructures and mechanical properties of two conventionally cast Al-Mg-Zn base alloys during aging process. The results show that the Ga-bearing alloy exhibits higher hardness and tensile strength, which can be attributed to its higher precipitate number density. In addition, the structure of formed precipitates differs between the two alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Qiang Yang, Xiaohan Wu, Wei Zhang, Zixaing Yan, Guodong Tong, Xuegang Chen, Shuhui Lv, Tao Xu, Jun Li, Xin Qiu
Summary: An ultrathin wall Mg-8Zn-8Al alloy with coarse ix-Mg grains, ultra-fine beta-Mg grains, and nano-sized icosahedral quasicrystal phase particles has been manufactured by high-pressure die casting. The alloy exhibits outstanding strength and acceptable elongation. The observations through HAADF-STEM reveal possible amorphous regions, C-containing phase and/or MgO aggregations, and Zn-rich clusters and pyramidal precipitates. The combination of ultra-fine grains and the skeleton consisting of nano-sized I-phase particles and solutes contributes to the ultra-high strength. In addition, the study indicates the unavoidable interaction of alloy melt with CO2 during ultra-thin wall HPDC and the possibility of pyramidal precipitation in Zn-containing magnesium alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Kai Guan, Daisuke Egusa, Eiji Abe, Jinghuai Zhang, Xin Qiu, Qiang Yang, Jian Meng
Summary: The effect of Gd content on the microstructure and tensile properties of as-cast Mg-Sm-Zn-Zr alloy was investigated. The addition of Gd inhibited the segregation behavior of Zn in the Mg3Sm phase and improved the tensile yield stress of the alloy. Gd-modified alloys exhibited significant age-hardening effect, attributed to the high-volume fraction and high density nano-scale precipitates.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Nanoscience & Nanotechnology
Sang-Hwa Lee, Jae-Gil Jung, Sung-Il Baik, Sung Hyuk Park, Min-Seok Kim, Young-Kook Lee, Kwangjun Euh
Summary: The addition of Ti refines the grain size, reduces phase agglomeration, and improves the strength and ductility of the alloy, with the extrusion forming a bimodal structure of fine DRXed grains and coarse unDRXed grains.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Shujuan Liu, Zihao You, Zhi Zhang, Tengfei Zhao, Xiaobo Zhang, Ruizhi Wu
Summary: A high-performance Mg-10Gd-4Dy-1.5Ag-1Zn-0.5Zr (wt.%, EQ142X) alloy was designed using multi-element composite addition, resulting in high yield strength (approx. 396 MPa) and ultimate tensile strength (approx. 451 MPa) after hot extrusion and ageing. The high strength is attributed to fine grains and nano-precipitates, especially beta' and gamma nano-precipitates, which act as the main strengthening phases. The introduction of nano-precipitates network into the fine-grained structure is proposed as an effective strategy for developing high-strength Mg alloys.
Article
Materials Science, Multidisciplinary
Alok Singh, Takanobu Hiroto, Machiko Ode, Hiroyuki Takakura, Karel Tesar, Hidetoshi Somekawa, Toru Hara
Summary: The precipitation of a stable quasicrystalline i-phase has been observed in a Mg-6Zn-3Al magnesium alloy, which may be the first discovery of a stable i-phase in this alloy. The dissolution of i-phase at grain boundaries leads to precipitation in the Mg-matrix during cooling. Nucleation characteristics, phase transformation, and interface morphology were investigated.
Article
Construction & Building Technology
Yong Wang, Yuefeng Wang, Zhenhua Wang
Summary: This study successfully increased the yield strength of 18Mn18Cr0.6 N steel through cold rolling and annealing, and found the importance of dispersed fine globular Cr2N precipitates for strengthening effect.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Chemistry, Physical
Namhyuk Seo, Junhyub Jeon, Sang-Hwa Lee, Kwangjun Euh, Su-Hyeon Kim, Tae-Young Ahn, Seung Bae Son, Seok-Jae Lee, Jae-Gil Jung
Summary: The microstructural evolution and precipitation behavior of a multicomponent Al83Zn5Cu5Mg5Li2 alloy were investigated using TEM and APT. The as-cast alloy consisted of V-Al5Cu6Mg2 and ri-Mg(Zn,Cu,Al) phases, which partially dissolved during solution treatment. Different cooling methods resulted in the formation of different precipitates. Natural aging induced the formation of solute clusters, contributing to the age-hardening of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
J. D. Robson, A. D. Smith, J. Guo, J. M. Donoghue, A. E. Davis
Summary: Competitive continuous and discontinuous precipitation (CP and DP) in magnesium alloys have been studied in-situ for the first time. The migration of the high angle grain boundary (reaction front, RF) behind which DP occurs is found to be irregular instead of steady-state. Local effects play a key role in causing the irregular motion of the RF.
Article
Nanoscience & Nanotechnology
Xinsheng Huang, Mingzhe Bian, Yasumasa Chino
Summary: The effects of aging precipitation on microstructure, deep drawing formability, and tensile properties of Mg-6Al-1Zn alloy sheets were investigated. It was found that aging at high temperature significantly improved the deep drawability, resulting in an increased limiting drawing ratio. This improvement can be attributed to the prevention of cracking at the edge of the drawn cup by restricting the growth of tensile twins and basal slip through aging precipitation.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Zhao Yang, Chao Xu, Taiki Nakata, Shigeharu Kamado
Summary: This study investigated the effect of extrusion parameters on the microstructural evolution and tensile properties of a Mg-8.0Gd-4.0Y-1.0Mn-0.4Sc alloy. Different DRX mechanisms, such as DDRX and CDRX, were identified, and the alloy with larger extrusion ratio exhibited smaller DRXed grains and a high number of fine precipitated particles. The alloy extruded at 400°C and ratio of 20:1 showed superior strength, while alloy extruded at 450°C and ratio of 10:1 exhibited higher elongation to failure. The enhanced strength was attributed to strong basal texture, refined DRXed grains, and dense distribution of fine particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Shuhui Lv, Qiang Yang, Xiaoling Lv, Fanzhi Meng, Xin Qiu
Summary: A ZK60 alloy was prepared by conventional direct extrusion at a reduced temperature, resulting in finer DRXed grains with stronger fiber texture and more abundant lath-like sub-grains. After aging, nanosized precipitates formed in both DRXed and non-recrystallized grains, while coarse MgZn2 particles precipitated on sub-grain boundaries. The aged ZK60 alloy exhibited significantly high ultimate compressive strength, excellent strength-ductility balance, and a weakened tension-compression yield strength asymmetry.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Yu-Ying He, Gang Fang
Summary: In this study, the dynamic precipitation (DP) of Mg17Al12 phase during the deformation of an Mg-Al-Zn-RE alloy was investigated. The effects of temperature and strain rate on the volume fraction, number density, and average size of Mg17Al12 precipitates were studied. Phenomenological models linking the precipitation parameters with deformation conditions were established and validated. The pinning effect of DP on grain growth and the influence of temperature on DRXed grain size were also discussed. The results provide insights into the understanding of microstructural evolution in the Mg-Al-Zn-RE alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Cheng Liu, Xiaohua Yang, Jianchao Peng, Bin Liu, Qun Luo, Qian Li, Kuo-Chih Chou
Summary: The deformation behaviors of a dual-phase Mg alloy containing α-Mg and 18R-LPSO phases were investigated in this study. The 18R phase, accounting for 11.3 vol.%, contributed to 23.0% of the overall alloy deformation. The coordinated twinning deformation of α-Mg matrix through the slip of basal dislocations and the kinking deformation of Mg slices induced by the 18R phase were observed during the early stage of deformation. At the end of deformation, a large number of T2-type stacking faults were generated, improving the ductility of the alloy. This work provides a novel strategy for designing high-strength and good ductility dual-phase Mg alloys.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Alok Singh, Takanobu Hiroto, Machiko Ode, Hiroyuki Takakura, Karel Tesar, Hidetoshi Somekawa, Toru Hara
Summary: The precipitation of a stable quasicrystalline i-phase has been observed in a Mg-6Zn-3Al magnesium alloy, which may be the first discovery of a stable i-phase in this alloy. The dissolution of i-phase at grain boundaries leads to precipitation in the Mg-matrix during cooling. Nucleation characteristics, phase transformation, and interface morphology were investigated.
Article
Materials Science, Multidisciplinary
Hidetoshi Somekawa, Hitoshi Fukuoka, Alok Singh, Hideki Yamaura
Summary: The impact of micro-alloying on tensile behavior at different strain rates is investigated using five types of extruded Mg-0.3 at. pct Mn-0.1 at. pct X ternary alloys. Microstructural observations reveal that the micro-alloying elements segregate at grain boundaries, affecting the mechanical properties and deformation behavior. Different micro-alloying elements lead to different mechanical properties and deformation mechanisms.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Vei Wang, Jun-Ping Du, Hidetoshi Somekawa, Shigenobu Ogata, Wen Tong Geng
Summary: This study examines the segregation of rare earth alloying elements in magnesium and its effect on grain boundary sliding. It is found that the segregation of manganese enhances the grain boundary sliding and promotes the ductility of magnesium.
Article
Materials Science, Multidisciplinary
Elango Chandiran, Rintaro Ueji, Yukiko Ogawa, Kenta Nagata, Hidetoshi Somekawa, Masahiko Demura
Summary: A new concept for the alloy design of advanced structural steels was proposed based on the experimental elaboration of deformation behaviour in two novel medium carbon bainitic steels. The chemical composition and heat treatment conditions were designed using sparse mixed regression modelling. The results showed that both steels exhibited high tensile strength and good elongation. Steel A showed greater post-uniform elongation, while Steel B showed larger uniform elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Elango Chandiran, Yukiko Ogawa, Rintaro Ueji, Hidetoshi Somekawa
Summary: The effect of grain size and strain rate on the room-temperature compression of pure magnesium was studied. It was found that the deformation mechanisms and grain-boundary sliding were significantly influenced by grain size and strain rate, and the Hall-Petch relationship broke down under certain conditions. Additionally, the deformation mode had a negligible impact on the dominant deformation mechanisms and the Hall-Petch breakdown.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Motohiro Yuasa, Ryoichi Sato, Takao Hoshino, Daisuke Ando, Yoshikazu Todaka, Hiroyuki Miyamoto, Hidetoshi Somekawa
Summary: Mg-9 at%Y-6 at%Zn and Mg-2 at%Y-1 at%Zn alloys were processed by equal-channel-angular extrusion (ECAE) to investigate their microstructure evolution and local hardness. The area fraction of the kink bands in the Mg-9 at%Y-6 at%Zn alloys increased with increasing the number of ECAE passes, resulting in higher hardness. In the Mg-2 at%Y-1 at%Zn alloys, the microstructural evolution of the alpha-Mg matrix phase and long-period stacking ordered (LPSO) phase by 1-pass ECAE and the increase in local hardness were discussed.
MATERIALS TRANSACTIONS
(2023)
Article
Nanoscience & Nanotechnology
Rintaro Ueji, Kenji Nagata, Hidetoshi Somekawa, Masahiko Demura
Summary: This study designed the chemical compositions and heat treatment conditions for low-alloyed TRIP steel using a sparse mixed regression method. Experimental results confirmed that these conditions provided high strength and large elongation. Evaluating the metallurgical parameters highlighted two different design concepts.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Hidetoshi Somekawa, Kimiyoshi Naito
Summary: The effect of micro-alloying with different elements on grain boundary sliding behavior at intermediate temperatures was examined. The micro-alloying element affects the damping capacity and the tensile response of the alloy. The partial contribution of grain boundary sliding to deformation is the major reason for the deviation of experimental results from calculated values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Naomi Nishimura, Kazumasa Masaki, Wei Tan, Reona Iimura, Hiroaki Kobayashi, Kei Nishikawa, Toshihiko Mandai, Hidetoshi Somekawa, Yoichi Tominaga
Summary: To improve the cycle performance of Mg metal batteries, a polymer coating (PSTFSI-Mg) was applied on the surface of spinel-type MgMn2O4 cathode. The polymer coating promoted electron transfer between particles, as confirmed by transmission electron microscopy. Density functional theory calculations revealed that the polymer reduced the energy gap between the valence band maximum of MgMn2O4 and the highest occupied molecular orbital level of the electrolyte, thus suppressing electrolyte degradation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Hidetoshi Somekawa, Kei Nishikawa, Taku Moronaga, Takahito Ohmura
Summary: Two types of lithium metals with different average grain sizes were successfully produced through extrusion process and rapid molding process. The hardness of the metals was found to be influenced by grain size, decreasing with a finer grained structure, which is contrary to the trend observed in other light-weight pure metals. The fine-grained Li metal exhibited a large strain rate dependence and unusual behavior, attributed to the contribution of grain boundary sliding to deformation. Additionally, the fine-grained Li metal showed better electrochemical characteristics in terms of over-potential and voltage response during charging and discharging operations.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Hidetoshi Somekawa, Norie Motohashi, Shuji Kuroda, Toshihiko Mandai
Summary: Wide and thin Mg foils with thicknesses between 35 & mu;m and 400 & mu;m without any edge cracks are successfully produced. The initial microstructure in the billet is effective and essential for the processing. The mechanical properties of the foils are influenced by the foil thickness, as shown by hardness and tensile tests.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Elango Chandiran, Yukiko Ogawa, Rintaro Ueji, Alok Singh, Hidetoshi Somekawa
Summary: The effects of different crystallographic orientations of the grains on damping capacity (tan8) in magnesium alloys were investigated. The results showed that the grain orientation had a significant impact on the damping capacity of pure magnesium and Mg-Sc alloy. The absence of the solute atom Sc resulted in higher damping capacity in pure magnesium compared to the Mg-Sc alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hidetoshi Somekawa, Motohiro Yuasa
Summary: The secondary formability and the effect of shape application on induced kink boundaries in Mg-9at.%Y-6at.%Zn alloy were investigated through experimental and numerical studies. A tube-shaped alloy without any cracks was successfully formed with kink boundaries associated with the applied shear strain. Numerical results showed a substantial shear strain at the contact region, but with an opposite shear direction after tube formation, indicating the possibility of de-kinking behavior. Additionally, the formed alloy exhibited higher hardness by 30 Hv compared to the un-processed alloy, and the correlation between kink density and hardness was consistent with literature results on wrought-processed Mg-Y-Zn alloys.
Article
Urology & Nephrology
Sano Takanori, Nobuyuki Hinata, Ryoya Kobayashi, Tatsuya Nakatsuji, Yasuyoshi Okamura, Junya Furukawa, Yuzo Nakano, Toshiji Mukai, Masato Fujisawa
Summary: We developed a bioabsorbable metal alloy and found that it has good degradability and no stone adhesion. It was safely used in animal experiments.
WORLD JOURNAL OF UROLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yukiko Ogawa, Alok Singh, Hidetoshi Somekawa
Summary: The damping capacities of three different phases (hcp, bcc, and martensite) in a Mg-Sc alloy were investigated. Results showed that the martensite phase exhibited a higher damping capacity compared to hcp and bcc phases. The higher damping capacity of the martensite phase is attributed to the movement of lattice defects, such as twin interfaces.
MRS COMMUNICATIONS
(2022)
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)
