Article
Materials Science, Multidisciplinary
C. J. Barr, K. Xia
Summary: The influence of particle size and morphology on grain refinement in low stacking fault energy alloys was investigated, showing different mechanisms in recrystallization process for various particles. The orientation of lamellar structures relative to ECAP plays a significant role in grain refinement.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Mayu Asano, Motohiro Yuasa, Hiroyuki Miyamoto
Summary: The study found that materials with low SFE exhibit a decrease in dislocation cell or grain sizes during the early stages of deformation, regardless of the presence of solute atoms. However, the solid solution effect causes a delayed saturation of dislocation density and hardening, leading to the formation of a UFG structure in the later stages of deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Walaa Abdel-Aziem, Atef Hamada, Takehiko Makino, Mohsen A. Hassan
Summary: The study focused on the micro/meso-forming of commercially pure aluminum AA1070 through 4 deformation passes using ECAP at room temperature. The findings showed that as the number of passes increased, there was a transition from a non-uniform grain structure to a uniform ultrafine-grained structure, resulting in a significant improvement in hardness. Additionally, the micro/meso-scale ECAP was capable of developing a weak texture in the flow plane compared to the starting texture.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Anton Hohenwarter, Reinhard Pippan
Summary: This study focuses on the fracture properties of pure iron deformed at 200 degrees C by equal angular channel pressing, evaluating the fracture toughness for different specimen orientations and comparing the results with material processed by a different route. The findings indicate that route B-C offers higher fracture toughness compared to route A.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. Nagaraj, Suresh Neelakantan
Summary: The effect of equal channel angular pressing (ECAP) strain on the grain size and mechanical properties of cp-Ti was studied. The 4th pass ECAP sample showed ultrafine grains and enhanced strength compared to the annealed sample. The tribocorrosion behavior in simulated body fluid was also evaluated, showing lower friction coefficient and wear loss for the 4th pass sample due to its enhanced strength.
MATERIALS TODAY COMMUNICATIONS
(2023)
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
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
Shipeng Yue, Jianping Qu, Guoliang Li, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Yubo Zhang, Tingju Li
Summary: This study investigated the microstructure evolution and mechanical properties of Cu-3Ag-xZr alloys processed by equal channel angular pressing at room temperature. The results showed that significant grain refinement and excellent comprehensive properties were achieved, which could provide a feasible way for the preparation of high-performance alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Automation & Control Systems
Jairo Alberto Munoz, Mohan Chand, Javier Walter Signorelli, Jessica Calvo, Jose Maria Cabrera
Summary: This study investigates the microstructural evolution, plastic anisotropy, and mechanical behavior of a duplex stainless steel processed by the ECAP technique. The results show that the ECAP processing led to the formation of ultrafine grains with grain sizes smaller than 300 nm in both austenite and ferrite phases. The different strain hardening rates of austenite and ferrite result in plastic instabilities at different strain magnitudes, with austenite providing more hardening while ferrite contributes to ductility. Additionally, crystal plasticity simulations reveal that austenite is more responsible for larger planar anisotropy values compared to ferrite after multiple ECAP passes.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Erhan Baysal, Oguz Kocar, Engin Kocaman, Ugur Koklu
Summary: Research on ultra-fine grain materials has gained attention in recent years, with a focus on improving material properties and decreasing costs. Severe plastic deformation methods have emerged as a good alternative, resulting in materials with grain sizes below 1 μm and positively affecting the mechanical properties.
Article
Materials Science, Multidisciplinary
Seong-Hwan Bae, Young-Chul Shin, Ji-Woon Lee, Ki-Ho Jung, Soong-Keun Hyun
Summary: This study applied equal-channel angular processing (ECAP) to investigate the effect of CaO addition on the microstructural evolution and mechanical properties of an AZ31 alloy during annealing. Compression tests were performed to evaluate the alloy's mechanical properties, while microstructural analysis revealed the flow behavior. The addition of CaO resulted in the fragmentation of Ca-bearing second-phase particles, leading to an increase in yield strength and flow stress.
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
Chemistry, Physical
Zhiyong Zhao, Jun Gao, Yaoqi Wang, Yanling Zhang, Hongliang Hou
Summary: The effect of equal channel angular pressing (ECAP) on the deformation of Ti-6Al-4V alloy at higher temperatures was investigated through hot compression tests. The alloy with ECAP processing showed better plastic deformation at temperatures above 600 degrees C due to significant dynamic recrystallization.
Article
Chemistry, Physical
Xu Wang, Zhu Xiao, Xiang-peng Meng, Yu-hang Yi, Lei Chen
Summary: A Cu-based alloy was deformed by equal channel angular pressing (ECAP) at different temperatures, and the evolution of its microstructure and mechanical properties was studied. The cryogenic-deformed samples exhibited slightly higher hardness compared to the room-temperature-deformed samples, but their yield strengths were similar after multiple ECAP passes. ECAP deformation significantly refined the grain size of the alloy through dislocation subdivision and twin fragmentation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
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)