Article
Materials Science, Multidisciplinary
Changping Tang, Jiajun Chen, Xiang Ma, Wenhui Liu, Hongmei Xie, Maohua Li, Xiao Liu
Summary: The effect of ram speed on the microstructure and mechanical properties of a Mg-11Gd-3Y-0.5Nd-Zr alloy was investigated. It was found that a bimodal-grained structure was formed at a speed of 1 mm/s, while an equiaxed grains structure was formed at speeds higher than 5 mm/s. The best strength and ductility were observed in the sample extruded at 1 mm/s.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Peng Peng, Aitao Tang, Jia She, Jianyue Zhang, Shibo Zhou, Kai Song, Fusheng Pan
Summary: Fabricating bimodal grain structure by adding various Mn contents in Mg alloys is an effective way to improve mechanical properties. Among the alloys studied, Mg-1.0Gd-1.5Mn shows the best mechanical properties, with significantly improved tensile yield stress and ultimate tensile stress. The enhancement in strength is mainly attributed to the bimodal grain structure formed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Zhaobin Zhang, Jonghyun Kim, Taekyung Lee, Meng Li, Yu Gao, Fusheng Pan
Summary: The aim of this study was to substitute Gd for Y in Mg-2Ni-2Y alloy and observe its effects on microstructures and mechanical properties. The substitution of Gd decreased the volume fraction of the LPSO phase, leading to a reduction in mechanical strength. However, Gd promoted the dissolution of the LPSO phase in the α-Mg matrix, influencing the mechanical properties of the alloy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Liu-wei Zheng, Yong-peng Zhuang, Jun-jian LI, Hong-xia Wang, Hang LI, Hua Hou, Li-fei Wang, Xiao-ping Luo, Kwang Seon Shin
Summary: The effect of Nd addition on the microstructure and mechanical properties of as-extruded Mg-9Gd-0.5Zr alloy is investigated. Nd addition results in the disappearance of elongated non-dynamic recrystallized grains and the formation of uniformly distributed dynamic recrystallized grains. In addition, the precipitation of nano-Mg5(Gd,Nd) particles enhances the strength and ductility of the alloy.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Zehua Yan, Yandong Yu, Jiahao Qian, Junting Luo, Yanchao Sang
Summary: A high-strength Mg-based alloy bar was successfully fabricated by extrusion and two-step aging processes. The extent of extrusion was found to affect the refinement mechanisms of the alloy, with larger extents leading to finer grains and eutectic phases. Peak-aged treatment resulted in increased strength due to the presence of beta' phase and LPSO phase. Over-aging led to reduced performance as lamellar precipitates and spherical beta' phase increased in size.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Yi Liu, Yang Song, Na Li, Xuechao Sha, Mengning Xu, Bin Chen, Bo Gao, Lirong Xiao, Hao Zhou
Summary: In this work, the evolution of precipitations in a Mg-10Gd alloy was systematically studied based on atomic-scaled TEM and HAADF-STEM observations. The transition mechanism from G.P. Zone to beta, beta', beta(T) and beta(M) was proposed, along with their relationships with mechanical properties. The blocking effect of precipitations significantly improved the strength, according to the Orowan mechanism. The elliptic cylinder shaped beta' phase with a base-centered orthorhombic lattice structure provided significant strengthening effects, enhancing the hardness and ultimate tensile strength.
Article
Materials Science, Multidisciplinary
Hao Pang, Jian Bao, Quanan Li, Xiaoya Chen, Peijun Chen, Xiangyu Li, Jinfeng Tan
Summary: The effect of Sm on microstructures and mechanical properties of Mg-Gd-Zr alloys was investigated. The addition of Sm promoted dynamic recrystallization and precipitation, leading to improved high-temperature mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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
Chemistry, Physical
Ya Liu, Jiuba Wen, Huan Li, Junguang He
Summary: The effects of extrusion temperature and extrusion ratio on the microstructure, corrosion resistance, and mechanical properties of Mg-Zn-Gd-Y-Zr alloy were investigated. Higher extrusion temperatures and larger extrusion ratios were found to result in better mechanical properties and corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Zijian Yu, Xi Xu, Adil Mansoor, Baotian Du, Kang Shi, Ke Liu, Shubo Li, Wenbo Du
Summary: A high-performance Mg alloy was successfully prepared by low-temperature hot extrusion, showing improved mechanical properties due to the presence of three phase variants, solid solution elements, and a bimodal structure. The alloy contains a novel island-shaped beta(1R) phase formed by strain-induced, dislocation-assisted dynamic precipitation. The mechanical properties are significantly enhanced by the densely distributed beta(1R) precipitates via Orowan strengthening at both room temperature and elevated temperatures.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lin Yan, Zhimin Zhang, Yong Xue, Jian Xu, Beibei Dong, Xubin Li
Summary: This paper investigates the grain refinement and mechanical performance improvement of Mg-9Gd-4Y-2Zn-0.5Zr alloy after rotating shear extrusion (RSE) and backward extrusion (BE) methods. The results demonstrate that RSE method has more advantages than BE method in terms of grain refinement and mechanical performance improvement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jian Bao, Quanan Li, Xiaoya Chen, Qian Zhang, Ziyi Chen
Summary: This study successfully designed a Mg-Gd based alloy with improved extrudability under differential-thermal condition, resulting in excellent mechanical properties. The as-extruded alloy exhibited good ductility with elongation of 14.3% at room temperature and 26.2% at 250°C, while the peak-aged alloy showed significantly enhanced strength.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Yuzhou Du, Wei Du, Danli Zhang, Yanfeng Ge, Bailing Jiang
Summary: Extrusion deformation significantly improved the mechanical properties of an Mg-Zn-Ca alloy, leading to a refined microstructure and a bimodal microstructure. The yield strength of the alloy increased from 42 MPa in the as-cast state to 285 MPa in the as-extruded state.
MATERIALS SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Minghang Zhou, Hui Cheng, Jiakun Wang, Liang Zhu
Summary: Nano-precipitation can effectively strengthen magnesium alloys by pinning and inhibiting dislocations' motion. In this study, a novel twin-precipitation composite gradient structure alloy was prepared using ultrasonic surface rolling process (USRP) and heat treatment, and it showed high thermal stability and improved mechanical properties. The unique composite gradient structure was formed through promotion-precipitation strengthening mechanism.
Article
Metallurgy & Metallurgical Engineering
T. Nakata, C. Xu, K. Kaibe, Y. Yoshida, K. Yoshida, S. Kamado
Summary: Strength and ductility of an Mg-3%Al-Mn alloy sheet were improved using twin-roll casting and low-temperature annealing, resulting in excellent tensile properties and stretch formability.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Nanoscience & Nanotechnology
T. Nakata, C. Xu, Y. Ito, S. Kamado
Summary: The effect of homogenization on microstructures and tensile properties in a dilute Mg-Zn-Ca-Mn alloy sheet was investigated. High-temperature homogenization dissolved eutectic intermetallic phases before rolling, but led to significant growth of alpha Mn precipitates and coarse grain structure after rolling and annealing. Rolling without homogenization or after low-temperature homogenization resulted in increased fraction of intermetallic phases, but achieved a fine grain structure due to dispersed alpha Mn precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Shiwei Xu, Congcong Zhu, S. Kamado, K. Oh-ishi, Yun Qin
Summary: This study systematically investigates the dynamic recrystallization behavior of as-cast AZ91 magnesium alloy under hot compression deformation at 350 degrees C. The results show that multiple DRX mechanisms, including twinning, grain boundary bulging, and particle-stimulated nucleation, are observed at 350 degrees C. Continuous DRX is the dominant mechanism at this temperature. Compared to hot compression at 300 degrees C, the DRX grain size and volume fraction increase after hot compression at 350 degrees C.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
J. Zuo, T. Nakata, C. Xu, Y. P. Xia, H. L. Shi, G. S. Wang, G. Z. Tang, G. H. Fan, S. Kamado, L. Geng
Summary: The microstructure evolution and mechanical properties of the as-drawn dilute Mg-0.8Al-0.1Ca-0.6Mn alloy wires during annealing and peak-aging treatment were investigated. The study revealed that the high density of nano-sized Al-Mn precipitates hindered grain boundary migration and restricted grain growth during low-temperature annealing, while partial dissolution of Al-Mn precipitates led to obvious grain growth and increased uniformity of recrystallization grain size during high-temperature annealing. Additionally, there was a growth preference in grains with a specific orientation, which was closely associated with texture changes. Furthermore, the alloy exhibited a significant age-hardening response after peak-aging treatment at 500 degrees C for 10 minutes, resulting in simultaneous improvement of tensile yield strength and elongation to failure, which was mainly attributed to the formation of monolayered Guinier-Preston (G.P.) zones and planar Al2Ca precipitates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
T. Nakata, C. Xu, Nurul Aliea Syafiqa binti Osman, L. Geng, S. Kamado
Summary: By investigating the effects of Al content on the mechanical properties, formability, and corrosion resistance of magnesium alloy sheets, it was found that moderate Al addition significantly improves these properties, resulting in good overall performance of the alloy sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
J. Zuo, T. Nakata, C. Xu, Y. P. Xia, H. L. Shi, X. J. Wang, G. Z. Tang, W. M. Gan, E. Maawad, G. H. Fan, S. Kamado, L. Geng
Summary: A high strength dilute Mg-0.8Al-0.1Ca-0.6Mn alloy wire was successfully developed by hot drawing, with the high strength attributed to the ultra-fine DRXed grains, coarse elongated unrecrystallized grains with dense dislocations, and nano sized Al2Ca and Al-Mn precipitates dispersed in the alloy wire.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
T. Nakata, T. Hama, K. Sugiya, S. Kamado
Summary: The deformation behavior of a weakly textured Mg-1.52Zn-0.09Ca alloy sheet during room-temperature tests was investigated. The sheet exhibited high elongation to failure and satisfactory stretchability, but inferior bendability. This study provides important guidance for the development of room-temperature formable Mg alloy sheets.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
T. Nakata, Z. H. Li, T. T. Sasaki, K. Hono, S. Kamado
Summary: This study reports the influence of grain boundary segregation on microstructure development during hot-rolling of AZ31 alloy. Annealing at 420 degrees C induces strong grain boundary segregation, promoting dynamic recrystallization and strong basal texture. Annealing at 500 degrees C reduces grain boundary segregation, hindering dynamic recrystallization and resulting in a weak rolling-direction-split texture, improving the stretch formability of the alloy sheet.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Zhao Yang, Taiki Nakata, Chao Xu, Gang Wang, Lin Geng, Shigeharu Kamado
Summary: A high-performance Mg-8Gd-4Y-0.5Mn-0.2Sc alloy was fabricated using homogenization, hot extrusion, and ageing. The microstructure evolution during homogenization was studied, and an optimum time of 18 h was determined to minimize the volume fraction of second phase particles and maintain a fine grain structure. The alloy exhibited excellent age-hardening ability and strength after peak-aged treatment, with a tensile yield stress of 441 MPa and an ultimate tensile strength of 506 MPa. The high yield strength was attributed to the co-existing bimodal microstructure, fine dynamically recrystallized grains, dense precipitated particles, and nano-scale precipitates. Precipitation strengthening was revealed as the dominant strengthening mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
T. Nakata, C. Xu, L. Geng, S. Kamado
Summary: This paper reports the application of cold-sample rolling (CSR) processing in a Mg-6Al-1Zn alloy sheet, which resulted in a high fraction of double twins and a substantial texture-weakening effect. Compared to high-temperature rolling (HTR) processing, CSR processing induced a relatively higher texture-weakening effect. The results indicate that twinning-mediated static recrystallization is essential for texture weakening in Al-concentrated Mg-alloy sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Shiwei Xu, Congcong Zhu, Zhanhong Lin, Chen Jin, S. Kamado, K. Oh-ishi, Yun Qin
Summary: The dynamic microstructure and texture of dilute Mg-0.50Al-0.71Ca-0.33Mn alloy during hot rolling were investigated. The study revealed the important role of extension twins, double twins, and kinks in the formation of rolling texture.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Z. H. Li, S. Gao, T. T. Sasaki, T. Nakata, S. Kamado, N. Tsuji, K. Hono
Summary: Clarifying the origin of the yielding phenomenon is crucial for improving the flow stability and surface finish of magnesium alloy sheet products. This study investigates the effect of Zn addition on discontinuous yielding in low-alloyed magnesium alloy sheets and reveals the significant impact of Zn on yield-drop. Transmission electron microscopy and atom probe tomography analysis demonstrate the influence of Ca-Zn co-clusters on dislocations, and different stretching directions of the sheet result in distinct Luders deformations.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Zhao Yang, Gang Wang, Chao Xu, Miao Wang, Taiki Nakata, Hongyu Xu, Lin Geng, Shigeharu Kamado
Summary: In this study, Mg-Gd-Y-Mn-Sc alloys with different Mn and Sc contents were prepared. The addition of Mn and Sc refined the grain size and promoted the dynamic recrystallization and dynamic precipitation during hot extrusion, resulting in improved strength-ductility balance of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
T. Nakata, T. Matsuno, R. Oki, S. Kamado
Summary: The effect of micro-texture on the tensile properties and room-temperature stretch formability of Mg-Al-Zn alloy sheet was studied. The introduction of micro-texture through solution treatment, hot-rolling, and post-annealing increased the fraction of a unique texture component, which improved the limiting dome height without compromising the strength due to the high activity of tensile twinning and minimal change in the Schmid factor for basal slips. This finding highlights the importance of micro-texture designing for the development of high strength-formability synergy in magnesium alloy sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Chunli Wang, Lianshan Sun, Bingbing Tian, Yong Cheng, Limin Wang
Summary: This paper presents a strategy to prepare carbon supported MoO2 spheres for lithium-ion battery with high volumetric capacity density and initial Coulombic efficiency. Experimental results show that the material exhibits excellent reversible capacity and capacity retention, and also demonstrates potential value in terms of compaction capacity density.
ENERGY & ENVIRONMENTAL MATERIALS
(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)
