Article
Materials Science, Multidisciplinary
Song-Jeng Huang, Murugan Subramani, Konstantin Borodianskiy, Philip Nathaniel Immanuel, Chao -Ching Chiang
Summary: This study investigated the development of an AZ61 hybrid composite (HBC) reinforced with Al2O3 and SiC nanoparticles using the stir casting method and followed by equal channel angular pressing (ECAP). The introduction of reinforcements resulted in the breakdown of precipitates and the enhancement of ductility. The grain size of the HBCs was highly reduced with an increase in the number of ECAP passes. The optimal mechanical properties were observed in the AZ61 + 2%Al2O3 + 1%SiC hybrid composite after two passes of ECAP.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Shiwen Hu, Taojun Li, Qinglin Li, Dexue Liu
Summary: Equal channel angular pressing (ECAP) was used to enhance the mechanical properties and wear resistance of a biomedical TiZrNb medium entropy alloy (MEA). The alloy exhibited an increased yield strength and hardness after multiple deformation passes, with the formation of coarse grains and dense dislocation walls (HDDWs) that evolved into shear bands.
Article
Chemistry, Physical
Song-Jeng Huang, Matoke Peter Mose, Veeramanikandan Rajagopal
Summary: The ECAP method significantly refines the microstructure of AZ61 alloy, enhancing its hydrogen storage capacity and reaction kinetics. The addition of Ni catalyst after ECAP treatment accelerates hydrogen absorption and desorption kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Min Zha, Chun-Xue Wang, Zhong-Zheng Jin, Hai-Long Jia, Hong Xu, Ping-Yu Zhang, Yu Huang, Ping-Kui Ma, Hui-Yuan Wang
Summary: This study investigates the microstructure and texture evolution of a Mg-3.7Al-0.7Zn-0.8Sn-0.4Mn alloy under different ECAP routes, showing that increasing the number of ECAP passes can improve strength and ductility. The optimized mechanical properties can be achieved through proper ECAP processing, indicating the great potential of Mg-Al-Zn-Sn alloys for low-cost high-strength-ductility wrought Mg alloys.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Physical
Weiyang Wang, Shuang Zhou, Zhu Xiao, Wenting Qiu, Qian Lei
Summary: This study investigated the microstructure evolution and properties of a CuCrZrSc alloy undergoing aging treatment and equal channel angular pressing (ECAP). The results showed that pre-aging treatment significantly improved the mechanical properties and electrical conductivity of the alloy. After 12 passes of deformation and aging treatment, the alloy exhibited enhanced mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhaohui Shan, Jie Yang, Jianfeng Fan, Hua Zhang, Qiang Zhang, Yucheng Wu, Weiguo Li, Hongbiao Dong, Bingshe Xu
Summary: In this study, a homogeneous refined microstructure and exceptional mechanical properties of AZ61 Mg alloy were achieved through a combination of ECAP and EPT. By controlling the processing time and duration of EPT, the alloy's yield stress and ultimate tensile strength were significantly increased, with a simultaneous refinement of grain size.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Guzide Meltem Lule Senoz, Taha Alper Yilmaz
Summary: Optimization of ECAP parameters improved the mechanical and microstructural properties of Al-Zn-Mg alloy, with the optimal condition identified. Temperature was found to have a significant effect on grain size.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yaxiao Gu, Jinghua Jiang, Qiuyuan Xie, Aibin Ma, Zheng Gao
Summary: This study investigated the effect of indium addition and pressing process on the discharge performance and electrochemical properties of commercial AZ61 alloy, indicating that indium addition promoted the formation of second phases and pressing process refined the grains and contributed to the uniform grain distribution, leading to improved discharge activity and anode utilization in pressed AZ61-In alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Zhu Xiao, Weiyang Wang, Qian Lei, Biaobiao Yang, Meng Wang, Yihai Yang, Daren Zhou, Zhou Li
Summary: The microstructural evolution and property variations of CuCrZrY alloy processed by ECAP were systematically studied. After multiple passes of ECAP, the average grain size decreased significantly, leading to improved mechanical properties and electrical conductivity. The main strengthening mechanisms include precipitation strengthening, low-angle grain boundary strengthening, and high-angle grain boundary strengthening. The inconsistency of strain force between outer and inner regions may result in the inhomogeneity of microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Automation & Control Systems
Behzad Akbarzadeh, Hamid Gorji, Mohammad Bakhshi-Jooybari, Roohollah Jamaati, Mohammad Javad Mirnia
Summary: C-Ex-ECAP, a new severe plastic deformation method combining extrusion and ECAP processes, can achieve ultrafine grain structure in fewer passes compared to ECAP, and is capable of fabricating longer specimens.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xiaojie Zhou, Zihang Guo, Yu Tu, Yi Wang, Jian Zhang, Gang Zeng, Xianzheng Lu, Xiaomin Chen, Yaru Liu
Summary: In this study, the microstructure evolution and mechanical properties of Mg-Zn-RE alloys were compared. It was found that the different alloy compositions resulted in different phases, and processing improved the strength-ductility synergy of the alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Hongfei Wang, Chunyan Ban, Nannan Zhao, Lei Li, Qingfeng Zhu, Jianzhong Cui
Summary: In this study, pure titanium samples with a purity of 99.99 wt.% were successfully processed by ECAP at cryogenic temperature, leading to significant grain refinement and increased hardness. The activation of slip systems during deformation process was observed, and the influence of temperature on grain refinement was discussed. Factors affecting the homogeneity of microstructure were also analyzed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Haoran Wu, Jinghua Jiang, Huan Liu, He Huang, Yuhua Li, Jiaying Chen, Aibin Ma
Summary: A novel method was developed to prepare a high-strength and high-ductility magnesium alloy through continuous refinement of grains, resulting in significant improvements in the alloy's properties after rapid processing, mainly attributed to grain refinement, uniform distribution of the second phase, and dynamic recrystallization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yuxuan Yuan, Aibin Ma, Haoran Wu, Zheng Gao, Yaxiao Gu, Jinghua Jiang
Summary: The LPSO phase in the new biomedical Mg-Y-Zn-Mn alloy prepared by solution treatment and equal-channel angular pressing (ECAP) is gradually refined and dispersed during processing and treatment, promoting the improvement of the alloy's mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
N. R. Bochvar, O. V. Rybalchenko, N. Yu. Tabachkova, G. V. Rybalchenko, N. P. Leonova, L. L. Rokhlin
Summary: Effects of equal-channel angular pressing (ECAP) with subsequent aging on the microstructure and phase transformation of Al-Mg2Si alloys with combined (Sc + Zr) and (Sc + Hf) additions were studied. The microstructure processed by ECAP and the precipitation of phases of Al-Mg2Si alloys were thoroughly examined by transmission electron microscopy (TEM). It has been revealed that transition metals added to Al-Mg2Si alloys do not change the character of decomposition of the solid solution but shift the precipitation temperatures of the beta, beta' and beta phases to lower temperatures compared to the quenched state. Recovery processes have been revealed in the temperature range 200-600 degrees C based on the changes in hardness and electrical resistivity of Al-Mg2Si alloys with additions of transition metals (Sc + Zr) and (Sc + Hf) and without them after ECAP.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)