Article
Chemistry, Physical
Chengjun Guo, Yufan Shi, Xiangpeng Xiao, Shuming You, Guihuan An, Yahui Gong, Bin Yang
Summary: Microalloying with Al, Zn, and Si was investigated for its effects on the microstructure, physical properties, and softening resistance of Cu-Ni-Sn alloy. The results showed that the addition of Al, Zn, and Si effectively suppressed the segregation of the alloy, resulting in increased hardness and softening temperature. The presence of Al and Zn solute atoms and the formation of Ni31Si12 phase inhibited discontinuous precipitation formation and dislocation movement, leading to excellent mechanical properties and softening resistance in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chengfa Ding, Zheng Ma, Shiwen Liu, Jinghua Zhao, Qun Luo, Hongliang Liu, Guangxin Wu, Jieyu Zhang
Summary: In this paper, a low-aluminum, low-magnesium Zn-Al-Mg alloy with high corrosion resistance is designed by CALPHAD method. The phase composition of the alloy is predicted and verified. It is found that the Mg2Zn11 phase in the alloy can improve corrosion resistance.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Guo -lei Liu, Zhi-yong You, Wei -li Cheng, Lin Luo, Hui Yu, Li -fei Wang, Hang Li, Ze-qin Cui, Jin -hui Wang
Summary: This study investigates the dynamic recrystallization mechanism and hot deformation behavior of the Mg-0.5Bi-0.5Sn-0.5Mn alloy. The results show a strong correlation and suggest that cross-slip is the primary deformation mechanism. The processing maps indicate the most suitable processing conditions, and the occurrence of continuous and discontinuous dynamic recrystallization under different deformation conditions is observed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Guo-lei Liu, Wei-li Cheng, Lin Luo, Hui Yu, Li-fei Wang, Hang Li, Hong-xia Wang, Jin-hui Wang
Summary: In this study, the dynamic recrystallization (DRX) mechanism and hot-deformation behavior of a novel precipitate-free Mge0.25Bie0.25Sn alloy were investigated. Processing maps and constitutive equations were constructed to predict the hot deformation behavior. The results showed that continuous dynamic recrystallization (CDRX), discontinuous dynamic recrystallization (DDRX), and a transformation of prismatic slip to pyramidal II slip occurred during hot compression.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yi Yu, Qinglin Pan, Weiyi Wang, Zhiqi Huang, Shengqian Xiang, Bing Liu
Summary: Isothermal hot compression tests were conducted on Al-Mg-Si-Ce-B alloy at temperatures from 623-823 K with strain rates of 0.01-50 s-1. The alloy showed plastic deformation instability at relatively low temperatures, with optimized deformation parameters identified as 783-823 K/0.03-0.04 s. The microstructure was characterized using TEM and EBSD, and the influence of Z parameter on dynamic softening mechanisms was discussed, showing both DRV and CDRX as softening mechanisms during hot deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Kai Ling, Wenfeng Mo, Pan Deng, Junwei Chen, Binghui Luo, Zhenhai Bai
Summary: The hot deformation behavior of the Al-4.96Cu-0.96Mg-0.63Ag-0.57Mn-0.13Zr-0.02Ti alloy was studied by conducting hot compression experiments. The flow stress of the alloy decreases with increasing temperature and decreasing strain rate. The highest stress is reached at a large strain due to the difficulty of the dynamic softening effect to offset the work hardening caused by high-density dislocations. The optimal processing parameters region exhibits dynamic recrystallization as the dominant softening mechanism.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhaoqian Sun, Yongjun Li, Kui Zhang, Xinggang Li, Minglong Ma, Guoliang Shi, Jiawei Yuan, Hongju Zhang
Summary: The study found that the Mg-Sn-Al alloy has good hot deformation characteristics and excellent plastic deformation properties. The alloy has a wide thermal processing range and a stable processing interval within a broad range of deformation temperatures and rates, with optimal process parameters being deformation temperatures between 603 and 633 K and strain rates of 0.03 to 0.005 s(-1).
Article
Materials Science, Multidisciplinary
Hansong Xue, Song Liu, Wei Xie, Yang Zhou, Jianbo Peng, Haitao Pan, Dingfei Zhang, Fusheng Pan
Summary: The effects of different Dy additions on the microstructure and mechanical properties of Mg-6Zn-1Mn-3Sn (wt%, ZMT613) alloys were investigated. The study found that Dy addition resulted in significant grain refinement and the formation of new MgSnDy phases. A small amount of Dy (≤0.8 wt%) hindered the proportion of dynamic recrystallized grains during the hot-extrusion process and enhanced the basal texture of the alloy. MgSnDy high-temperature phase particles inhibited the recovery process and promoted the precipitation of the second phase. The ZMT613-0.2Dy alloy showed optimum mechanical properties after aging, with yield strength, ultimate tensile strength, and elongation reaching 336 MPa, 399 MPa, and 4.4%, respectively.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Xuanliang Chen, Daehan Kim, O. Minho, Calin D. Marioara, Sigmund J. Andersen, Adrian Lervik, Randi Holmestad, Equo Kobayashi
Summary: Pre-deformation has a strong impact on the subsequent age-hardening behavior of the Al-3Mg1Cu alloy, accelerates precipitation, enhances hardness peaks, inhibits cluster formation, and increases the amount of precipitates along dislocation lines. This study's findings are important for the advancement of combined mechanical deformation and heat treatment processes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Xia Chen, Dingfei Zhang, Junyao Xu, Jingkai Feng, Yang Zhao, Bin Jiang, Fusheng Pan
Summary: The addition of Sn in Mg-Zn-Mn-Ca alloys was found to significantly increase the mechanical properties, with precipitate strengthening being the main contributor. The strength of the alloy gradually improved with increasing Sn content, showing noticeable effects in both hot extruded and age treated conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xudong Du, Feng Wang, Zhi Wang, Le Zhou, Ziqi Wei, Zheng Liu, Pingli Mao
Summary: The hot tearing susceptibility of Mg-xAl-yCa alloys with different Ca/Al ratios was experimentally investigated. The results showed that the hot tearing susceptibility decreases with the increase in the Ca/Al ratio. The microstructure and thermal analysis curves of the alloys indicated that a higher Ca/Al ratio enhances intergranular bonding ability and improves the filling efficiency of the liquid phase against tears.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
R. A. Shishkin, O. G. Reznitskikh, A. Yu Suntsov, V. L. Kozhevnikov
Summary: Lightly doped strontium cerates maintain a stable structure even at high temperatures and have potential as thermal barrier coating materials. The choice of doping element affects the corrosion resistance and stability of the material. Tin-doped derivatives are unstable due to leaching, while doping with large atoms leads to decreased corrosion resistance. SrCe0.95Y0.05O3 stands out due to its small grain size, porosity, optimized thermal expansion, chemical stability, and high hardness.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Lunchao Zhang, Yuan Yuan, Jun Wang, Tao Chen, Jingfeng Wang, Fusheng Pan
Summary: High temperature heat treatment Mg-0.69Sn-0.69Y alloy exhibited a high damping capacity (0.201 at epsilon=1 x 10-3) and a very low critical strain amplitude at room temperature (epsilon cr1=2.97 x 10-5), which can be ascribed to the combined effects of purified matrix phase and subgrain interfaces. The substructure is unstable and the damping capacity decreases with temperature increment.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Jiazhi Li, Hua Ding, Baomian Li, Weilin Gao, Jie Bai, Gang Sha
Summary: The addition of Sn in Cu-Cr-Sn alloys promotes the precipitation of Cr phase and inhibits the coarsening of Cr precipitates, resulting in improved strength. Precipitation strengthening is the dominant mechanism for increasing the yield strength. Additionally, the high softening temperature of the designed Cu-Cr-Sn alloys is attributed to the inhibitory effect of Sn on the coarsening of Cr precipitates and delayed recrystallization of deformed structure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Ming-ya Zhang, Yu-qin Zhang, Hui Yu, Hong-xia Wang, Xiao-feng Niu, Li-fei Wang, Hang Li, Wei-li Cheng
Summary: This paper investigates the deformation behavior of a dilute Mg alloy during hot compression and finds that the activation of twinning and dynamic recrystallization is influenced by the strain rates. The study also reveals that the crystal orientation is altered by the activation of twinning and DRX processes, playing a significant role in the plastic deformation behavior of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)