Article
Chemistry, Applied
Zhongtao Jiang, Xiang Meng, Bin Jiang, Shan Jiang, Jiahong Dai, Jingren Dong, Yongfeng Ding
Summary: This study confirmed the effectiveness of Mg-10Al2Y master alloy as a grain refiner for Mg-3Y alloy, with optimum performance observed at 2 wt% addition. The addition of Al2Y particles resulted in significant enhancement in both strength and elongation of the alloy.
JOURNAL OF RARE EARTHS
(2021)
Article
Materials Science, Multidisciplinary
Xingyu Bai, Conglin Hu, Guobing Wei, Guo Li, Hao Chen, Bin Li
Summary: This study fabricated GNP/AZ31 composites using one-pass friction stir processing and analyzed their microstructure and mechanical properties through various techniques. The results showed that FSP could refine grains, strengthen basal texture, and improve the mechanical properties of the composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Dongqing Zhao, Guanyu Li, Peiliang Li, Jixue Zhou, Kaiming Cheng, Yunteng Liu, Yuansheng Yang, Junpeng Duan, Reza Ghomashchi, Xitao Wang
Summary: The study compared the microstructures and mechanical properties of extruded Mg-xCa/Mn/Ce alloys and pure Mg, finding that addition of Ca, Mn, and Ce could achieve fine grain sizes. The addition of Ca, Mn, or Ce also affected the textures of the alloys. Mg-0.5Ca/Mg-2Mn and Mg-1Ce showed better mechanical properties compared to pure Mg. These results suggest that conventional extrusion can produce fine-grained Mg-xCa/Mn/Ce alloys with improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Shaopeng Li, Xiaoyan Wang, Zichao Wei, Yuanfei Han, Huigang Shi, Jianwen Le, Guangfa Huang, Di Zhang, Weijie Lu
Summary: This study proposes a technique to overcome the strength-ductility mismatch of sintered titanium matrix composites by in-situ planting TiB nano-fibers and La2O3 nano-particles. By fabricating (TiB+La2O3)/Ti composites with excellent strength-ductility synergy, the ultra-fine network and fine-grain effect improved the elongation and ultimate tensile strength. The strength-ductility synergy effects were attributed to fine-grain effects and the synergistic effect between nanoreinforcements and the matrix. This work opens up a new route for sintering nanoparticles reinforced titanium matrix composites components with promising properties.
SCRIPTA MATERIALIA
(2022)
Article
Mechanics
Haoyuan Liu, Tianli Han, Qingkui Li, Benshuang Sun, Chengduo Wang
Summary: In this study, novel spatial arrangements of in-situ MgO particles were introduced into AZ31 using ball milling and hot extrusion. The MgO/AZ31 composites exhibited a honeycomb-like structure, which contributed to the greatly enhanced strength and slightly improved ductility.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Bowei Yang, Yu Wang, Minqiang Gao, Changfeng Wang, Renguo Guan
Summary: In this study, the mechanical properties and strengthening mechanisms of a rheo-extruded 5087 alloy processed via accumulative continuous extrusion forming (ACEF) were investigated. It was found that ACEF led to significant grain refinement in the alloy, resulting in improved ultimate tensile strength (UTS) and yield strength (YS). The formation of dislocation cells/walls during deformation promoted the development of low angle grain boundaries (LAGBs), which subsequently transformed into high angle grain boundaries (HAGBs) due to accumulative strain. The presence of nano-sized Al-6(Mn, Fe) phases at the grain boundaries inhibited grain growth.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Peiran Ye, Chao Yang, Zhenshuai Li, Shuai Bao, Yuchu Sun, Wucheng Ding, Yungui Chen
Summary: This study compares the microstructure, texture, and mechanical properties of conventional solidification (as homogenized AZ31) and rapid solidification (as RS AZ31) using commercial AZ31B magnesium alloy. The results show that a rapidly solidified microstructure leads to better performance after hot extrusion. The as-RS AZ31 extruded rod has a smaller grain size and higher yield strength compared to the as-homogenized AZ31 extruded rod.
Article
Materials Science, Multidisciplinary
Wenxue Fan, Yu Bai, Guoliang Zuo, Yapeng Sima, Hai Hao
Summary: An Al-CeO2-Mg master alloy prepared through a novel direct melt reaction process has been validated as an effective grain refiner for AZ31 Mg alloy, showing promising outcomes for grain refinement.
Article
Nanoscience & Nanotechnology
Peng Peng, Bo Wang, Shibo Zhou, Jia She, Aitao Tang, Jianyue Zhang, Fusheng Pan
Summary: This paper introduces a high-pressure holding stage in the continuous forging extrusion (CFE) process, which not only effectively heals cracks in magnesium alloys, but also promotes grain refinement. By optimizing the CFE process with this high-pressure holding, the strength and ductility of the alloy are greatly improved.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xiaoming Wang
Summary: TiB2 reinforcing particles tend to segregate to Al grain boundaries in traditional casting processes, resulting in heterogeneous properties of the composites. However, additive manufacturing (AM) using Al-Cu-Mg-Sc-TiB2 composite powders overcomes this issue and achieves a combination of high strength and high ductility. By exponentially refining the Al grains in AM, the segregation of TiB2 particles is avoided. Moreover, nanoparticles of intermetallics are formed inside the refined Al grains instead of forming networks along the Al grain boundaries in castings, which synergistically strengthen the composite with the TiB2 particles and overcome the strength-ductility trade-off.
Article
Materials Science, Multidisciplinary
Yihong Xian, Weijun He, Wenhuan Chen, Zejun Chen, Bin Jiang, Qing Liu
Summary: AZ31/Mg-Y/AZ31 composites were fabricated by hot rolling bonding. Fine grain size and Al2Y particles formation in the interface-adjacent region contribute to strengthening of the Mg-Y layer. The results provide a novel method for preparing high-melting-point particles in Mg alloys.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Hongbin Zhang, Jiawen Sun, Kang Chen, Haiping Zhou, Jianbo Jia, Zequn Wang, Yue Lu, Kuidong Gao, Wenhao Ma
Summary: The microstructure evolution and thermal stability of nanocrystalline AZ31-2.5 wt%VP magnesium matrix composites were investigated. The findings revealed that the composite maintained a nanocrystalline scale even after annealing at high temperatures, indicating excellent thermal stability. The uniformly distributed V particles in the magnesium matrix effectively inhibited grain growth and no new phases were formed. The hardness of the composite remained high even after annealing treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Guangyuan Bai, Yuan Yu, Xuelian Wu, Junqin Li, Yucheng Xie, Lipeng Hu, Fusheng Liu, Matthias Wuttig, Oana Cojocaru-Miredin, Chaohua Zhang
Summary: Adding boron simultaneously enhances the ZT and mechanical properties of GeTe-based alloys, resulting in improved stability and efficiency of TE modules at high temperatures.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Yang Chen, Yuechen Chen, Haoyu Zhai, Feifei Wang, Mingliang Wang, Zhe Chen, Shengyi Zhong, Xianfeng Li, Haowei Wang
Summary: A structural-functional integrated TiB2/Al-Mg-Gd composite with high thermal neutron shielding efficiency (99%) and excellent mechanical properties was fabricated using powder metallurgy-based methods. The refinement of Gd-contained phase in the composite played a key role in improving the neutron shielding property, which was supported by theoretical simulations and experimental results. This novel composite has the potential to be a promising candidate for neutron shielding materials in the future.
Article
Nanoscience & Nanotechnology
Fuqing Jiang, Lei Tang, Hengqiang Ye, Zhiqing Yang
Summary: A crack-free 7075 aluminum alloy with fine, randomly-oriented, and equiaxed grains was successfully prepared using laser powder bed fusion (L-PBF). The introduction of TiH2 particles effectively refined the grains and prevented hot cracking during L-PBF manufacturing. The addition of TiH2 stimulated heterogeneous nucleation and restricted grain growth during solidification. Furthermore, a conventional T6 treatment modified the microstructures and mechanical properties of the alloy, resulting in improved strength and elongation. These findings provide insights into the use of TiH2 for enhancing the microstructure and mechanical properties of high-strength aluminum alloys fabricated using L-PBF.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)