Article
Chemistry, Physical
Jiaguo Tang, Youping Yi, Hailin He, Shiquan Huang, Jingjing Zhang, Fei Dong
Summary: In this study, isothermal compression tests were conducted on the 2195 Al-Cu-Li alloy to investigate its hot deformation behavior. A processing map was established to predict the workability under different conditions, and the corresponding microstructures were analyzed to reveal the deformation mechanisms. The results indicate that the optimal hot-working conditions for the alloy are at temperatures of 460-500 degrees C and strain rates of 10-3-10-2 s-1, with dominant mechanisms of dynamic recrystallization and dynamic recovery.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Hua Wang, Dengfeng Yin, Ming-Chun Zhao, Yan Tian, Andrej Atrens
Summary: Hot deformation behavior and associated microstructural evolution in a quaternary Al-Cu-Li-Zn alloy were studied under different deformation conditions. The study found that dynamic recrystallization (DRX) was influenced by grain orientation and particle simulated nucleation (PSN) was the primary mechanism of DRX. Additionally, only a small fraction of DRX grains appeared under certain temperature and strain rate conditions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Xiaomin Huang, Ben Guan, Baoyu Wang, Yong Zang
Summary: Isothermal tensile tests are conducted on 2195-O Al-Li alloy to investigate its hot deformation behavior. The results show that the established constitutive equation accurately predicts the deformation behavior of the alloy. The fracture mechanism of the tensile specimens changes from ductile fracture to brittle fracture as the temperature increases. The average grain size of the specimens increases with increasing temperature, but coarsening occurs at higher temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jian Ning, Qun Li, Zongyuan Zou, Tianwei Liu, Lei Chen
Summary: Research on the hot tensile deformation behavior of 2195 Al-Li alloy in the temperature range of 440-500 degrees C revealed that the degree of dynamic recrystallization increases with the strain, and the pinning effect of precipitations is more sensitive to temperature. When the temperature reaches 500 degrees C, the weakening of the pinning effect of precipitations makes it easier to activate more dynamic recrystallization.
Article
Materials Science, Multidisciplinary
Peng Cheng Chen, Xi Wu Li, Yong Yao, Guo Hui Shi, Kai Wen, Zhi Hui Li, Yong An Zhang, Bai Qing Xiong
Summary: The hot deformation behavior of a novel Al-Cu-Li alloy was analyzed through isothermal compression experiments. The study found that the microstructure evolution during deformation was dominated by dislocation movement and substructure evolution. The alloy exhibited distinct dynamic recovery and slight dynamic recrystallization characteristics. The optimum deformation temperature and strain rate for the alloy were determined as at least 430 degrees C and 0.008-0.15 s(-1), respectively.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
H. Mohammadi, A. R. Eivani, S. H. Seyedein, Manojit Ghosh, H. R. Jafarian
Summary: This paper investigated the hot deformation behavior of Zn-22Al alloy, developed an Arrhenius-type constitutive model, determined constants through hot compression tests, and constructed a processing map using the principle of the dynamic materials model. The results indicated higher energy dissipation efficiency in the high-temperature ranges and low-strain rates, with unstable processing primarily occurring at high strain rates and low temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Hui Yi, Jian Ding, Changan Ni, Jiahang Dai, Ying Tang, Xueguang Chen, Kaihong Song, Xingchuan Xia
Summary: By studying the hot deformation behavior and intrinsic machinability of Al-0.5Mg-0.4Si-0.1Cu alloy, an accurate constitutive equation and processing map were established, and the optimal process parameters of the alloy were optimized.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Zijie Meng, Cunsheng Zhang, Guofang Zhang, Kuizhao Wang, Zuojiao Wang, Liang Chen, Guoqun Zhao
Summary: This study investigated the hot workability of the 1420 Al-Li alloy through experiments and analysis. An improved Johnson-Cook model and processing maps were established, and the microstructural evolution of the alloy was studied. Feasible hot working windows for the alloy were determined based on the results. This work provides comprehensive guidance for the hot working process of 1420 Al-Li alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Ya Tang, Daihong Xiao, Lanping Huang, Renxuan You, Xinyue Zhao, Nan Lin, Yunzhu Ma, Wensheng Liu
Summary: The study reveals that compression temperature significantly influences the characteristic and dynamic behavior of secondary phases in Al-Cu-Li alloy during hot deformation. Proper strain rates can accelerate the formation and growth of T-1 phase, but at higher temperatures, T-1 phase may completely dissolve into the matrix.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Ya Tang, Daihong Xiao, Lanping Huang, Renxuan You, Xinyue Zhao, Nan Lin, Yunzhu Ma, Wensheng Liu
Summary: In this study, the evolution of deformation microstructures and multiscale phases in Al-Cu-Li alloy was investigated under different temperatures and strain rates. The results showed that the compress temperature has an impact on the characteristic and dynamic deformation behaviors of secondary phases. Proper strain rates can promote the formation and growth of multistage banded T-1 phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Guojing Yang, Wenchen Xu, Xueze Jin, Zhiyuan Wang, Debin Shan, Bin Guo
Summary: This study investigates the influence of hot deformation parameters on the microstructure evolution and deformation behavior of the extruded 2195 Al-Li alloy. The optimized hot deformation conditions lead to continuous dynamic recrystallization and microstructure refinement. The presence of large second phases and liquid-like grain boundaries in the extruded plate results in a lower deformation activation energy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Rong Fu, Yuanchun Huang, Yu Liu, Hui Li
Summary: The thermal deformation behavior of homogenized 2195 Al-Li alloy was investigated under different deformation temperatures and strain rates. It was observed that the flow stress decreases with decreasing strain rate or increasing temperature. The decrease in flow stress at lower temperatures was attributed to the hindering effect of dynamic precipitation of fine secondary phases, which restrict the movement of dislocations and (sub)grain boundaries. Flow localization regions were also observed at specific microstructure conditions. Additionally, DRX and DRV were found to increase with decreasing lnZ values, and the dominant DRX mechanism varied with lnZ values.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Chuan Lei, Qudong Wang, Huaping Tang, Tianwen Liu, Zhongyang Li, Haiyan Jiang, Kui Wang, Mahmoud Ebrahimi, Wenjiang Ding
Summary: Isothermal uniaxial compression experiments were conducted on homogenized Al-5Mg-3Zn-1Cu alloy to investigate its hot deformation behavior. A strain-compensated constitutive model was established to predict flow stress with high accuracy. The dominant deformation mechanism of the alloy was identified as dislocation climbing, and processing maps were constructed to identify workable and unstable domains in different temperature and strain rate ranges.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Shuai Long, Dao-xiang Wu, Shu-yan Wang, Yu-peng Jiang, Run-ze Xia, Shi-shan Li, Yu-ting Zhou, Peng Peng, Qing-wei Dai
Summary: The flow behavior and thermal expansion behavior of a homogenized Al-Cu-Li alloy were investigated through quenching expansion tests and isothermal compression tests. It was found that the temperature rise dissolves coarse secondary phases and increases the coefficient of thermal expansion. Different constitutive models were evaluated, with the two-step optimized Johnson-Cook model showing the highest precision in predicting the material behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jing Xu, Xuemao Dong, Zhongxue Feng, Jialiang Dong, Caiju Li, Jianhong Yi
Summary: The hot deformation behavior of the Cu-20Ni-20Mn alloy was investigated through isothermal compression tests. The results showed that the flow stress of the alloy decreased with increasing temperature and decreasing strain rate. A constitutive equation and processing maps were established to determine the optimum processing parameters for the hot deformation of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
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)