Article
Metallurgy & Metallurgical Engineering
Dong Hee Lee, Gyo Myeong Lee, Sung Hyuk Park
Summary: The effects of extrusion temperature on the microstructure and tensile properties of AZ61 and AZ91 alloys were investigated. The average grain size of the extruded AZ61 alloy slightly increased with increasing extrusion temperature, but its microstructural variation was insignificant. In contrast, the average grain size of the extruded AZ91 alloy significantly increased with increasing extrusion temperature, and the type of Mg17Al12 precipitates formed in it also changed. The tensile properties of the extruded AZ61 and AZ91 alloys showed different dependence on extrusion temperature, which could be explained by their microstructural characteristics, strengthening mechanisms, and crack initiation sites.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Hao Shiming, Liu Pengru, Xie Jingpei
Summary: The present study investigates the hot deformation of 35%SiCp/2024Al composite using Gleeble-1500D thermo-mechanical simulators. It is found that the flow stress, microstructure evolution, and deformation mechanism are sensitive to deformation parameters, which can be represented by the Zener-Hollomon parameter (Z) in the hyperbolic sine equation. The softening mechanism, degree of dynamic recrystallization, average grain size, size of precipitates, dislocation density, and nucleation mechanism of dynamic recrystallization are influenced by the Z parameter, and the interaction laws are obtained through analysis.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Sang-Cheol Jin, Jae Won Cha, Jeong Hun Lee, Taekyung Lee, Sang -Ho Han, Sung Hyuk Park
Summary: This study investigates the microstructure and mechanical properties of extruded Mg-5Bi-xSn (BT5x, x = 0, 2, 4, and 6 wt%) alloys and finds that the addition of Sn significantly improves the tensile strength of the alloy. The refined grains and increased precipitates contribute to the enhanced mechanical properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Review
Chemistry, Physical
Yaqi Zheng, Yuan Zhang, Yun Liu, Yaqiang Tian, Xiaoping Zheng, Liansheng Chen
Summary: Magnesium and magnesium-based alloys are widely used in various industries due to their lightweight, specific strength, damping capacity, electromagnetic shielding properties, and controllable degradation. However, traditional as-cast magnesium alloys have defects that hinder their mechanical and corrosion properties. Extrusion processes are employed to eliminate these defects and enhance strength, toughness, and corrosion resistance. This paper comprehensively summarizes the characteristics and properties of extruded magnesium alloys, discusses the microstructure evolution, nucleation, texture weakening, and influence of extrusion parameters, and provides an outlook on future research directions.
Article
Metallurgy & Metallurgical Engineering
Chao Ding, Xiaoshi Hu, Hailong Shi, Weimin Gan, Kun Wu, Xiaojun Wang
Summary: The study utilized a hybrid approach with carbon nanotubes to enhance the strength and ductility of SiCp reinforced Mg matrix composites. A novel method was developed to disperse SiCp and CNTs simultaneously in the Mg melt, resulting in a new type of hybrid reinforcement material. The main strengthening mechanisms of the hybrid composite were identified as the load transfer effect and impeding microcrack propagation by CNTs.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Yahu Song, Aiqin Wang, Douqin Ma, Jingpei Xie, Wenyan Wang
Summary: The addition of dual-scale SiCp in A356 composite can significantly improve its mechanical properties, with the maximum enhancement observed at 25% volume fraction. The main strengthening mechanism for the dual-scale SiCp/A356 composite is Orowan strengthening, along with thermal mismatch strengthening, load transfer strengthening, and fine grain strengthening.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Nanoscience & Nanotechnology
Qiang Wang, Zhao-Hui Zhang, Tie-Jian Su, Xing-Wang Cheng, Xian-Yu Li, Shun-Zhong Zhang, Jian-Ye He
Summary: TiB/Ti-6Al-4V composites with controllable orientation were synthesized by powder consolidation and hot extrusion, showing excellent tensile strength and elongation due to the distribution of TiB whiskers along the extrusion direction.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Zhuangzhuang Zheng, Fantao Kong, Xiaopeng Wang, Yuyong Chen
Summary: The microstructure evolution and mechanical properties of high-Zr containing titanium matrix composite sheets are influenced by the deformation amounts, showing increased refinement of αp phase and silicide precipitation with higher deformation amounts. The strengthening effect at the αp/βt boundaries leads to heterogeneous deformation-induced strengthening effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jianyue Zhang, Peng Peng, Alan A. Luo, Jia She, Aitao Tang, Fusheng Pan
Summary: Dynamic precipitation and grain refinement occurred during low temperature extrusion of ZK60 alloy, leading to improved mechanical properties such as tensile strength and elongation. The presence of dynamic precipitates promoted nucleation of new grains and enhanced the alloy's strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Taiqian Mo, Huaqiang Xiao, Bo Lin, Wei Li, Pengju Wang, Kai Ma
Summary: This study systematically investigates the mechanical behavior of tri-metallic Al/Al/Steel composites, focusing on the effect of strengthening mechanisms introduced by interlaminar and internal microstructures. The results show that the tri-metallic composites exhibit excellent interface bonding and inhibited intermetallic compound formation. The mechanical properties of the tri-metallic composites are significantly improved compared to bi-metallic Al/Steel composites due to the precipitation strengthening behavior of the high-performance 7075Al. Various annealing treatments are conducted to further optimize the strength and ductility of the tri-metallic composites by inducing strengthening mechanisms near the interface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Gang Zhou, Yan Yang, Hanzhu Zhang, Faping Hua, Xueping Zhang, Chen Wend, Weidong Xie, Bin Jiang, Xiaodong Peng, Fusheng Pan
Summary: Duplex-structured Mg-7Li-2Al-1.5Sn alloys with high strength were fabricated and their strengthening mechanism was investigated. The alloys exhibited excellent high-temperature mechanical properties due to the presence of Sn-rich precipitates that prevent grain growth effectively.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jeong-Won Choi, Weihao Li, Kohsaku Ushioda, Motomichi Yamamoto, Hidetoshi Fujii
Summary: In high-pressure linear friction welding, the high pressure can maintain the precipitation strengthening effect in the welding region, resulting in a joint with mechanical properties equivalent to the base material. Under low pressure with high welding temperature, the volume fraction of precipitates significantly decreases, leading to softening of the joint.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Honggang Zhang, Jinhui Wang, Hongbin Ma, Yuan Yuan, Yongfeng Li, Yanzhuo Liu, Lei Zhang, Peipeng Jin
Summary: The addition of Sc to AZ61 magnesium alloy can improve the microstructure, suppress the nonuniform precipitation of Mg17Al12 phase, and enhance the mechanical properties of the alloy, resulting in increased tensile strength and yield strength.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Binbin Tang, Xianquan Jiang, Peipeng Jin, Haitao Wang, He Peng
Summary: The study found that the microstructure evolution of the composite material during hot extrusion is significantly influenced by the extrusion temperature and ratio, with dynamic recovery observed at 450°C and dynamic recrystallization dominating at 500°C and a ratio of 20.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Applied
Bibo Li, Kui Zhang, Guoliang Shi, Kaikun Wang, Yongjun Li, Xinggang Li, Minglong Ma, Jiawei Yuan
Summary: This research systematically studied the microstructure evolution, mechanical properties, and creep mechanisms of Mg-12Gd-1MM-0.6Zr alloy. The T5 treated alloy exhibited significantly higher tensile and yield strength but lower elongation compared to the as-extruded sample, while the as-extruded alloy showed the best creep resistance among all conditions tested.
JOURNAL OF RARE EARTHS
(2021)
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)