Article
Engineering, Chemical
Yanjun Liu, Yu Pan, Xin Lu, Jianzhuo Sun, Tailong Hui, Yucheng Yang, Aihua Yu, Xuanhui Qu, Jiazhen Zhang
Summary: TiAl turbine wheels fabricated using near-net shaping MIM technology exhibit high acceleration responsiveness and low energy consumption, with better rheological properties and excellent mechanical properties shown in the microstructure. This work provides a valuable method for fabricating complex-shaped TiAl turbine wheels.
Article
Metallurgy & Metallurgical Engineering
Wang Hu, Zhao Lin, Peng Yun, Cai Xiaotao, Tian Zhiling
Summary: TiAl-based alloy coating produced by laser melting deposition has excellent properties of high temperature and corrosion resistance, but poor wear resistance. TiB2 reinforced TiAl-based alloy composite coatings were prepared to improve their wear resistance and provide a theoretical reference for their applications in surface engineering. The microstructure and mechanical properties of the coatings with different TiB2 contents were systematically studied. With an increase in TiB2 content, the height of columnar crystal decreased and TiB2/TiAl composite coatings were formed. The surface hardness increased, while the fracture toughness and wear rate decreased as the TiB2 content increased. The wear mechanism shifted from microscopic cutting to microscopic fracture with an increase in TiB2 content.
ACTA METALLURGICA SINICA
(2023)
Article
Automation & Control Systems
Shaohua Su, Zijian Hong, Yongjun Wu, Peng Wang, Xiaobao Li, Junwen Wu, Yuhui Huang
Summary: This article investigates the impact of the sintering and hot isostatic pressing process on the microstructure and mechanical performances of Ti-6Al-4V alloy manufactured by MIM. The results indicate that the thickness of the dense layer, grain size, grain morphology, and grain orientation are key factors determining the mechanical performances. Under the optimized condition, Ti-6Al-4V alloy exhibits outstanding mechanical performances with high tensile strength, yield strength, and elongation.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yibo Ren, Ying Han, Shun Yan, Jiapeng Sun, Zhenxin Duan, Hua Chen, Xu Ran
Summary: Different powder metallurgical Ti-48Al-2Cr-2Nb compacts were prepared with varying microstructures. The compact with a bimodal grain structure showed a good combination of high compressive strength and improved compression ratio at room temperature, but exhibited different deformation behaviors at high temperatures.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Yuke Liu, Fubin Wang, De Xu, Jiandong Wang, Fengchun Jiang, Mehrdad Zarinejad, Yunxiang Tong
Summary: By tailoring laser power and interlayer dwell time, a near equiaxed grain structure can be achieved in Ti6Al4V alloy thin-wall specimens produced by laser metal deposition, overcoming the anisotropy in mechanical properties that is common in additive manufactured alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Composites
Chenglin Li, Qingyuan Du, Yue Ru, Hao Zhang, Yi An, Jiaming Liu, Daming Wu, Dali Gao, Jingyao Sun
Summary: With the increasing power consumption of electronic devices, the challenge of heat dissipation has become a major issue. This study focuses on the preparation of polypropylene/carbon fiber/Al2O3, polypropylene/carbon fiber, and polypropylene/carbon fiber/SiO2 composites with excellent properties using injection molding and injection compression methods. The results show that the composites prepared by injection compression have better thermal conductivity and mechanical properties compared to those prepared by injection molding.
COMPOSITES COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yongyun Zhang, Tieyuan Bian, Xueting Shen, Ziming Wang, Shulong Ye, Shihui Feng, Kaiping Yu, Chao Ding, Peng Yu
Summary: The study investigated the sintering mechanism of CoCrFeNiMn high entropy alloy samples produced by metal injection molding at different temperatures. It was found that a Cr-rich precipitate with a different BCC structure from the sigma phase was observed in all samples sintered at different temperatures, indicating a stable thermodynamic behavior that cannot be eliminated by water-quenching. The formation of the precipitate was related to the element Mn in the alloy, which segregated in the sub-grain boundaries during sintering, allowing for rapid diffusion of Mn and Cr from the interior to the surface of the powder, where the Cr-rich precipitates were formed in the grain boundaries in the late sintering stage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ye Zhang, Song Li, Dongyang Li, Yimin Li, Hao He, Chang Shu
Summary: In this study, a Fe-35Mn-0.5C alloy with low Mn volatility, high density, and favorable mechanical properties was successfully fabricated by the metal injection molding (MIM) process. The Mn volatilization was significantly reduced to less than 0.5%, and the relative density reached 97%. The optimized tensile properties were achieved, meeting the mechanical needs of biologically implantable medical devices.
Article
Automation & Control Systems
Ce Zhang, Yu Pan, Shuaihua Zhang, Wei Xu, Muhammad Dilawer Hayat, Jianzhuo Sun, Yun Zhang, Bowen Liu, Jiazhen Zhang, Xin Lu
Summary: Metal injection molding (MIM) is an effective method for preparing brittle TiAl alloy parts. The rheological properties, as-sintered microstructure, interstitial impurities, and mechanical properties of feedstocks using non-spherical powders were systematically studied. By optimizing raw materials and process control, Ti-48Al powder was prepared through self-propagation synthesis. The powder consists of TiAl, Ti3Al, and TiAl3, with an O content of 0.34 wt%. The pseudo-plastic flow behavior and powder loading of feedstock based on different binder systems (POM and PW) were studied. Sintering the non-spherical TiAl powder at 1450°C resulted in samples with a relative density of 96.4%, a tensile strength of 352 MPa, and an elongation of 0.32%, reaching the level of as-cast alloys. Furthermore, the microstructures of samples sintered at various temperatures were compared with the ingot metallurgy TiAl alloy.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Chengren Dai, Jian Sun
Summary: The microstructure and room-temperature tensile property of the gamma-Ti-45Al-8.5Nb-(W, B, Y) alloy after different heat treatments were investigated. The results showed that different cooling methods could obtain different microstructures, and the alloy subjected to a two-step heat treatment showed improved tensile properties. The improved tensile properties were attributed to microstructure refinement and reduction of remnant B2 phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Jie Liu, Mengfei Wang, Peng Zhang, Yuhua Chen, Shanlin Wang, Tongli Wu, Meirong Xie, Li Wang, Kehong Wang
Summary: This study achieved grain refinement in TiAl alloys through laser beam oscillation, leading to improved mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Crystallography
Xuexia Zhao, Junxin Wei, Hui Niu, Shouzhen Cao, Zhihao Du, Yi Jia, Haoming Yao, Zhixiong Zhang, Jianchao Han
Summary: A novel TiAl alloy was designed and fabricated in this study, and its thermoplastic deformation behavior, microstructure evolution, and mechanical properties were systematically studied during near-isothermal forging. The results showed that the alloy exhibited excellent mechanical properties at both room temperature and elevated temperature, attributed to the flawless forging disk without cracking, the microstructure composed of fine equiaxed grains and residual (alpha 2/gamma) lamellae, and the reduced hardness of the B2 phase and the hardness difference between the B2 and gamma phase due to the addition of Cr and V elements.
Article
Nanoscience & Nanotechnology
Liufei Huang, Yaoning Sun, Na Chen, Hengwei Luan, Guomin Le, Xue Liu, Yaqi Ji, Yiping Lu, Peter K. Liaw, Xiaoshan Yang, Yuzhao Zhou, Jinfeng Li
Summary: In this study, AlCoCrFeNi2.1 eutectic high-entropy alloy was prepared using laser metal deposition (LMD) technique. The LMD-fabricated alloy showed significantly enhanced tensile strength and increased ductility compared to conventionally cast samples. The improved mechanical properties were attributed to the refinement of the uniformly distributed eutectic structure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Chen Yuyong, Ye Yuan, Sun Jianfei
Summary: TiAl alloy sheets are important strategic structural materials in aerospace and automotive industry due to their high strength-to-weight ratio and high service temperature. This article reviews the preparation processes, sizes, microstructures, and mechanical properties of hot-rolling TiAl alloy sheets using different approaches, such as ingot metallurgy, powder metallurgy, direct rolling, and roll bonding. The features, existing problems, and future development suggestions of these processing routes are discussed.
ACTA METALLURGICA SINICA
(2022)
Article
Materials Science, Multidisciplinary
Hailing Wang, Qiang Wang, Liangcai Zeng, Hailong Zhang, Hongsheng Ding
Summary: In this study, Ti-47Al-2Nb-2Cr-2Mn alloy directionally solidified by electromagnetic cold crucible exhibited good mechanical properties at both room temperature and high temperature. The research found that dislocation slip and twinning jointly dominated room-temperature plastic deformation, with twin boundaries acting as obstacles to dislocation slip. Additionally, TiAl samples with different orientations showed varied friction and wear characteristics.
MATERIALS CHARACTERIZATION
(2021)
Review
Chemistry, Multidisciplinary
Lin Zhang, Xingyu Li, Xuanhui Qu, Mingli Qin, Zhongyou Que, Zichen Wei, Chenguang Guo, Xin Lu, Yanhao Dong
Summary: Ultrafine-grained (UFG) refractory metals are promising materials for various applications, but achieving full density while maintaining a fine microstructure through sintering remains challenging. This article provides an overview of sintering issues, microstructural design rules, and powder metallurgy practices for UFG and nanocrystalline refractory metals. It also reviews previous efforts, including the use of fine/nanopowders and field-assisted sintering techniques, and highlights the recent technological breakthrough of pressureless two-step sintering for producing dense UFG refractory metals. Additionally, the progress of powder metallurgy in specific materials systems, such as elementary metals and refractory alloys, is discussed, and future developments towards UFG and nanocrystalline refractory metals with improved properties are outlined.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kaixuan Cui, Ping Li, Wang Zhao, Chunrong Liu, Qi Wan, Shengwei Li, Xuanhui Qu
Summary: A uniform, dense, and low-oxidized W coating prepared by plasma spraying effectively prevents the corrosion of the Sb-Sn cathode on its current collector and improves the cycle stability of Li||Sb-Sn liquid metal batteries. For the first time, micro-CT nondestructive inspection is applied in the field of LMBs, obtaining the corrosion micromorphology and composition evolution of the SS304 matrix and Sb-Sn cathode with or without the plasma-sprayed W coating. The research provides a universal autonomous LMB device for nondestructive inspection and fills the knowledge gap in LMB detection technology by directly visualizing the inner critical positions in three dimensions.
CHINESE CHEMICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jingyang Nan, Xinbo He, Zhang Tao, Xuanhui Qu, Haiqing Yin
Summary: This study provides a homogenization method to investigate the impact of interfacial characteristics on the thermal conductivity of GF/Cu composites. Finite element homogenization method is used to establish representative volume element models of material microstructure and interfacial layers, taking into account the distribution morphology and thermophysical properties of interface compositions. The results indicate that the thermal conductivity of GF/Cu composites is significantly influenced by factors such as graphite sizes, graphite volume contents, interface contents, pore shapes, the relative density of interfacial layers, and whether the interface component is continuous.
KOVOVE MATERIALY-METALLIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kaixuan Cui, Ping Li, Wang Zhao, Shengwei Li, Chunrong Liu, Xuanhui Qu
Summary: This study systematically investigates the effects of different operating temperatures and charge-discharge regimes on the performance of Li||Sb-Bi-Sn liquid metal batteries. The optimal operating temperature is found to be 500 degrees C, and the batteries show excellent rate capability and anti-pulse interference ability. The calculated energy density of the batteries is 265 Wh kg-1, with electrode costs of only 58.62 $ kWh-1. Overall, this work paves a new direction for assessing high-performance liquid metal batteries for practical applications.
Article
Materials Science, Multidisciplinary
Chunrong Liu, Kaixuan Cui, Wang Zhao, Fanxin Lin, Yong Liu, Xuanhui Qu, Ping Li
Summary: A hydrogen-oxygen combination catalyst based on a ZrVFe hydrogen storage alloy loaded with Pd has been designed, which shows excellent hydrogen elimination capability in various conditions. The activity of the catalyst depends on the Pd loadings, and the 2 wt% Pd/ZrVFe catalyst exhibits rapid hydrogen-oxygen elimination reaction and high elimination efficiency. The catalyst is also resistant to irradiation, aerosol poisoning, and iodine vapor poisoning, providing a new approach to address hydrogen safety issues.
Article
Chemistry, Physical
Tianhao Wang, Shengwei Li, Xinger Weng, Lei Gao, Yu Yan, Ning Zhang, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: In this study, hierarchically porous V2O5 nanosheets vertically grown on carbon cloth were prepared, providing additional ion-diffusion channels and abundant active sites. The V2O5/C electrode exhibited exceptional high-rate capability and ultralong cycling durability in rechargeable aqueous zinc-based batteries. Moreover, the quasi-solid-state wearable zinc batteries employing the porous V2O5/C cathode demonstrated respectable performance even under severe deformations and low temperatures.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jingyang Nan, Xinbo He, Xuanhui Qu, Jiashu Wei, Zijian Zhang
Summary: This paper examines the wetting behavior of copper droplet on a graphite substrate using molecular dynamics simulation. It finds that the wetting process is influenced by Ar pressure, with hindered wetting at low temperatures and promoted wetting at high temperatures. However, beyond a certain Ar pressure, further increase does not improve wetting, and Ar pressure increases the potential of mean force between the copper droplet and the graphite substrate, making detachment more difficult.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Yao Wang, Xudong Zhao, Junteng Jin, Qiuyu Shen, Yang Hu, Xiaobai Song, Han Li, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: This study unravels the reductive coupling mechanism (RCM) in a novel P2-Na0.8Cu0.22Li0.08Mn0.67O2 cathode, which boosts the reversibility and kinetics of anionic redox reactions. The formation of strong covalent Cu-(O-O) bonding effectively suppresses excessive oxygen oxidation and irreversible cation migration, resulting in a cathode with remarkable rate capability and long-term cycling stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Wei Zheng, Guangqiang Zhang, Qian Zhang, Haichen Yu, Zongzhen Li, Mingyu Gu, Su Song, Shaoxiong Zhou, Xuanhui Qu
Summary: This research studied the effects of normal annealing (NA) and magnetic field annealing (FA) on the soft magnetic properties and microstructure of Fe82Si2B13P1C3 amorphous alloy iron cores. Different methods of magnetic field application were used during the annealing process. The results showed that Fe82Si2B13P1C3 had lower loss and higher coercivity than commercially produced Fe80Si9B11. The annealing process also led to the formation of wide strip domains with low resistance and easy magnetization in the Fe82Si2B13P1C3 iron cores.
Review
Chemistry, Physical
Guodong Miao, Ping Li, Chunrong Liu, Yong Liu, He Zhang, Fanxin Lin, Xuanhui Qu
Summary: Metal hydride (MH) hydrogen storage systems are being considered as an efficient and safe method for hydrogen storage. However, the low thermal conductivity of a metal hydride bed (MHB) poses a challenge in practical applications, requiring the adoption of efficient thermal management approaches. This paper reviews the development of MHB thermal management, including enhancing heat transfer through MHR structure modifications, improving the effective thermal conductivity of MHB through thermal conductivity enhancers, and strengthening heat transformation using phase change materials (PCM). The impact of various thermal management measures on heat and mass transfer is evaluated, with the benefits and drawbacks of different MHR structures summarized.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Chen Chen, Tianhao Wang, Xudong Zhao, Aiduo Wu, Shengwei Li, Ning Zhang, Xuanhui Qu, Lifang Jiao, Yongchang Liu
Summary: The study demonstrates the fabrication of OH-termination-rich V₂CTx material with interlayer K+-pillars (alk-V₂CTx) using a one-step alkalization method. The alk-V₂CTx cathode exhibits excellent reversibility and rapid Li+/Zn2+ co-insertion/extraction electrochemistry, along with superior rate performance and exceptional cycling life. The study also investigates the hybrid-ion storage mechanisms and presents flexible quasi-solid-state rechargeable Zn batteries with inspiring energy output even under severe deformation conditions and low temperatures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yu Pan, Yucheng Yang, Qingjun Zhou, Xuanhui Qu, Peng Cao, Xin Lu
Summary: By adding a minor CaC2 oxygen-scavenger, the excessive interstitial oxygen contamination in titanium and its alloys can be effectively solved, resulting in high strength and superior ductility. This novel method offers a cost-effective way to develop high-performance titanium materials.
Article
Materials Science, Multidisciplinary
Shuyi Xie, Bin Xu, Cong Zhang, Dil Faraz Khan, Xue Jiang, Ruijie Zhang, Yongwei Wang, Haiqing Yin, Xuanhui Qu
Summary: This study investigates the effects of doping 7 refractory elements (V, Cr, Zr, Nb, Mo, Hf, and Ta) on the site preference, elastic properties, and bonding effect of Ni2TiAl. The results show that V and Cr can effectively improve the bonding stability and strength of Ni2TiAl.
COMPUTATIONAL MATERIALS SCIENCE
(2024)
Article
Chemistry, Physical
Zhihui Ma, Jie Shi, Di Wu, Dishuang Chen, Shuai Shang, Xuanhui Qu, Ping Li
Summary: The sulfide-based solid electrolyte Li6+xSb1-xSnxS5I (LSSSI-x) is proposed as a solution to the air-sensitivity and Li-incompatibility issues in all-solid-state lithium batteries. The LSSSI-0.4 electrolyte exhibits high ionic conductivity, good moisture stability, and enables the fabrication of high-performance batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Chang Liu, Jianxiong Liang, Changjun Wang, Gang Chen, Xuanhui Qu, Yu Liu, Zhenbao Liu, Mengxing Zhang
Summary: In this study, PH13-8Mo stainless steel parts doped with cerium were fabricated and compared with undoped parts. The doping of cerium improved the microstructure, phase constituents, and tensile properties of the stainless steel. The results showed that doping with cerium enhanced the mechanical stability of austenite, improved the sphericity of oxide inclusion, and increased the ultimate tensile strength and fracture elongation of the PH13-8Mo parts. The improved strength and ductility were attributed to the strengthening effects of nanoscale precipitation and grain refining, as well as the enhanced inclusion sphericity and coherency between the inclusion and matrix.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
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)
