Article
Nanoscience & Nanotechnology
Nan Wang, Yongnan Chen, Gang Wu, Qinyang Zhao, Zhen Zhang, Lixia Zhu, Jinheng Luo
Summary: This study reveals the different contributions of geometrically necessary dislocation (GND) and statistically stored dislocation (SSD) to work hardening in dual-phase steel. By introducing high-density GND through pre-tensile loading-unloading-reloading (LUR) and high-density SSD through monotonic pre-tensile, it is found that the steel with high GND exhibits higher yield stress and stronger strain hardening ability compared to the high-SSD steel, even with almost the same total dislocation density.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Wenke Wang, Jaimyun Jung, Chao Cui, Wenzhen Chen, Yang Yu, Peng Li, Wencong Zhang, Renlong Xiong, Hyoung Seop Kim
Summary: This work investigated the anisotropy variation of tensile flow stress for AZ31 magnesium alloys at different temperatures and tensile strains using the visco-plastic self-consistent model. The results showed that the anisotropy of flow stress weakened with increasing temperature and exhibited a slightly increasing stage followed by a continuously decreasing stage with increasing strain. Activation of basal slip and tension twinning contributed to the development of a (0002)//LD type texture during tension deformation, while activation of prismatic slip produced a < 10-10 >//LD type texture. The study found that the macroscopic average resolved shear stress decreased significantly with increasing temperature or strain, resulting in the decline of the tension deformation behavior anisotropy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Weng Mei Kok, Hun Guan Chuah, Heoy Geok How, Yew Heng Teoh, Hooi Min Yee, Wei Hong Tan
Summary: The present study investigated the influence of surface roughness on geometrically necessary dislocation (GND) and established the relation between surface roughness and GND. The results showed that an increase in surface roughness leads to an increase in GND and statistically stored dislocation density.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jian Liu, Yali He, Yaowu Hu
Summary: As metal forming processes continue to develop, understanding the nano-deformation behavior of metals is crucial for optimizing manufacturing processes and controlling the properties of nano-materials. Unfortunately, the effect of temperature on the deformation behavior of nano-metals under high strain rates remains largely unexplored. This study demonstrates the nonlinear effect of temperature on the formability of nano-metals.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Physical
Runrun Xu, Miaoquan Li
Summary: This study used EBSD and TEM technologies to investigate the deformability of Ti-42.9Al-4.6Nb-2Cr alloy and the coordination deformation mechanism between the beta phase and gamma phase, revealing that all Schmid factors for slip systems in the beta phase were larger than 0.25, mainly achieved through the fast CDRX rate of the beta phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Kai Zhang, Xinbao Liu, Ping Fan, Lin Zhu, Kai Wang, Lin Wang, Caili Zhao
Summary: This study investigates the change of geometrically necessary dislocation (GND) during the elevated temperature creep of P91 steel. The results show that the GND density increases significantly during the initial creep stage, reaches a maximum at the transition from initial creep to steady creep, and gradually decreases during subsequent creep. It also demonstrates that the GND density can be used to predict internal stress and analyze microstructure degradation of P91 steel during creep.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Qinan Han, Xusheng Lei, Hao Yang, Xiaolin Yang, Zimu Su, Shao-Shi Rui, Nan Wang, Xianfeng Ma, Haitao Cui, Huiji Shi
Summary: This paper investigates the effects of temperature and load on the distribution of geometrically necessary dislocation (GND) induced by fretting fatigue in titanium alloy. The results show that both temperature and load have significant effects on GND densities, with an increase in temperature and load leading to a rise in GND densities. The peak positions of GND density correspond well with crack formation locations, indicating a close relationship between GND concentration and fretting fatigue crack formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Reeju Pokharel, Bjorn Clausen, Daniel J. Savage, Jianzhong Zhang, Sven C. Vogel, Roberta Beal, James Valdez, Veronica Anghel, Donald W. Brown, George T. Gray III
Summary: Uniaxial compression tests were conducted on 99.9% pure polycrystalline ������-tin (Sn) at different strain rates and temperatures. The results showed that the strain rate and temperature have significant effects on the stress-strain response, microstructure evolution, and stress relaxation behavior. Neutron diffraction and electron backscatter diffraction were used to characterize the crystallographic structures and deformation mechanisms. Elastic-plastic self-consistent simulations were performed to understand the macroscopic behavior.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Yipeng Li, Yifan Ding, Cheng-en Li, Jiacheng Ren, Guang Ran
Summary: In this study, the effect of dislocation structures generated by pre-strain in submicron-sized copper on subsequent plastic deformation was investigated using in-situ nanocompression testing in a transmission electron microscope. The results revealed that the dislocations first undergo directional intermittent jumping motion along specific glide directions, and their jumping frequency and distance can be determined by the density and strength of obstacles in the crystal. The dislocation wall formed during pre-strain effectively pins the mobile dislocation in the early stages of compression, but at high stress levels, it leads to dislocation avalanches and strain burst emissions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Crystallography
Qizhen Li
Summary: This study analyzed the GND densities of five selected fine-grained magnesium samples. Different fatigue-loading conditions were applied to three samples at 0 degrees C, one experienced quasi-static tensile loading at 0 degrees C, and one represented the as-rolled state. The results provide new insights into the deformation mechanism of fine-grained magnesium at 0 degrees C, showing significant increases in GND density for the tested samples compared to the as-rolled sample, especially for the sample with low-maximum applied stress.
Article
Nanoscience & Nanotechnology
Jing-Hua Zheng, Catalin Pruncu, Kai Zhang, Kailun Zheng, Jun Jiang
Summary: This study provides direct and systematic experimental data by revealing the evolution of dislocation density and grain size of AA6082 alloy under different conditions, using Electron Back Scattering Diffraction (EBSD) technique. The results show continuously increased geometrically necessary dislocation densities during hot deformation, as well as the presence of dislocation channel structures and dynamic recrystallization. The study is the first to visualize high temperature and high strain rate induced dislocation distributions over a relatively large area, offering valuable insights for improving physically based material models.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Geological
Guowen Xu, Marte Gutierrez, Ketan Arora, Xin Wang
Summary: The study introduces a novel fractional damage visco-plastic model to describe the time-dependent behavior of rocks, successfully dividing the creep response into primary, secondary, and tertiary creep stages. The influence of time-dependent parameters on the deformation of surrounding rocks was revealed through the model's application, validating the reliability of the model.
Article
Engineering, Manufacturing
Bin Zhang, Andrew C. Meng, W. J. Meng
Summary: Metal forming at the meso- and micro-scale can be affected by the grain size of the material, leading to deviations from conventional plasticity. Larger grain sizes in copper require higher pressures for extrusion in axisymmetric reverse extrusion and result in less flow into micron-sized gaps in double-punch molding compared to smaller grain sizes. Crystallographic orientation data suggests that larger grain sizes store more dislocations during deformation, influencing the mechanical behavior.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2021)
Article
Materials Science, Multidisciplinary
Kelvin Wong, Nicholas Armstrong
Summary: The complexity of collective dislocation behavior has led to the use of mesoscopic models, but there is no generally accepted method for transforming a deterministic model into a stochastic one. This study proposes a physically motivated method for deriving stochastic models that preserve the non-negativity of the dislocation density and ensure the desired physical bounds.
Article
Nanoscience & Nanotechnology
Xiguang Deng, Deliang Zhang, Qingyang Jiao, Songxiao Hui, Wenjun Ye, Lina Zou, Zhisheng Nong
Summary: The Schmid factors of grains in a Ti-2Al alloy were determined and used to investigate the twinning behavior during deformation at different temperatures. It was found that the fraction of twinned grains decreased with increasing deformation temperature. The critical resolved shear stress required to activate twinning was calculated and found to decrease linearly with increasing deformation temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Liang Wu, Xing-Xing Ding, Xiao-Feng Zhao, Yuan-Huan Liu, Xue-Long Hao, Ai-Tao Tang, Gen Zhang, Fu-Sheng Pan
Summary: In situ-grown Mg-Al layered double hydroxide (LDH) films were obtained on an anodized AZ31 substrate by immersing the sample in different concentrations of Al3+ solution. The structure, composition, and morphology of the LDH films were analyzed, and their corrosion behavior was studied using electrochemical impedance spectroscopy (EIS). The results showed that the interconnected MgAl-LDH nanosheets formed a nest-like structure in the LDH film. LDH obtained in 0.032 mol center dot L-1 Al3+ solution had a dense laminated structure and effectively sealed the porous surface of the anodic oxide film. EIS results demonstrated that the corrosion resistance of the LDH-coated samples was significantly improved compared to the anodized alloy.
Article
Metallurgy & Metallurgical Engineering
Qin Zhang, Yaobo Hu, Jun Wang, Fusheng Pan
Summary: In this work, CuS submicron spheres were synthesized using a low-temperature strategy and applied as a high-performance cathode for rechargeable magnesium batteries (RMBs). The CuS cathodes exhibited fast diffusion kinetics and remarkable storage performance due to the presence of nano needle-like particles on their surface. The investigation of the storage mechanism revealed a two-step conversion reaction controlled by diffusion during the electrochemical reaction process.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Qun Luo, Xingrui Li, Qian Li, Lingyang Yuan, Liming Peng, Fusheng Pan, Wenjiang Ding
Summary: The addition of La element to Al-Si alloy has significant improvement effects, achieving refinement of α-Al grains and modification of eutectic Si simultaneously.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yulong Wu, Liang Wu, Wenhui Yao, Yonghua Chen, Yan Zhou, Linqian Wang, Ting Wu, Bin Jiang, Andrej Atrens, Fusheng Pan
Summary: ZnAl-LDH-NO3 nanosheets were grown on MXene to inhibit its self-aggregation, and then mixed with epoxy resin and spun onto Mg PEO coatings. The resulting ZnAl-LDH-NO3@MXene nanocomposite exhibited long-term dispersibility and satisfactory sealing of the coatings. The synergistic effect between LDH and MXene nanosheets, along with the self-healing function provided by nitrate intercalation, contributed to the low wear rate and corrosion current density of the final coating. This work proposed a new strategy for MXene-based nanocomposites in anticorrosion/wear applications in epoxy coatings.
Article
Construction & Building Technology
Danqian Wang, Sanlve Pei, Ye Wang, Kai Ma, Chaoneng Dai, Jinxing Wang, Jingfeng Wang, Fusheng Pan
Summary: The effect of the magnesium-to-phosphate (M/P) ratio on the corrosion resistance of magnesium alloys embedded in magnesium phosphate cement pastes was investigated. The results showed that the corrosion resistance of magnesium alloys increased with an increased M/P ratio. The pH value played a dominant role in the protective capability of the oxide film formed on the magnesium alloy.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Jun Zhao, Yang Liu, Bin Jiang, Yuan Yuan, Jun Xu, Baijun Xiao, Xia He, Ganxin Chen, Ming Yuan, Fusheng Pan
Summary: The effects of adding Zn and Ca to Mg-1Gd alloy on its microstructure and mechanical properties were studied. The results showed the formation of fine and coarse phase particles and a significant refinement of dynamic recrystallized grains. An increase in strength and a decrease in ductility were observed.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Tiantian Wen, Baihua Qu, Shuangshuang Tan, Guangsheng Huang, Jiangfeng Song, Zhongting Wang, Jingfeng Wang, Aitao Tang, Fusheng Pan
Summary: A facile and effective approach to stabilize the magnesium (Mg) metal anode with artificial solid-electrolyte interphase (SEI) layers has been developed in this study. The 3D porous channel structure of the interfacial phytic acid (PA) skeleton regulates ion flux, homogenizes the distribution of Mg2+, and triggers uniform plating/stripping of Mg. This advanced strategy for modulating Mg2+ transport addresses the basic challenges for rechargeable magnesium metal batteries (RMBs).
ENERGY STORAGE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiang Wang, Yu'an Chen, Fusheng Pan
Summary: The effect of Sn content on the microstructure evolution of Mg-8Zn-2Y-x Sn alloys in as-cast, as-extruded, and as-aged states was systematically studied. The addition of Sn not only refined the grains but also promoted the precipitation of quasicrystal I-phase and Sn3Y5. The phase transformations during solidification were also examined, and after extrusion, the distribution of broken second phase particles (I-phase) in the matrix became more uniform and dense with Sn addition.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yankai Shu, Ziyi Wang, Hong Yang, Xianhua Chen, Jingying Bai, Fusheng Pan
Summary: An optimized method was proposed to identify activated slip directions based on intragranular misorientation axes (IGMA) analysis using electron backscattered diffraction (EBSD) data. The method was successfully applied to determine prismatic and basal slip systems in Mg alloys. The results demonstrated that this method is simpler and more efficient compared to other widely utilized methods.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Lintao Liu, Liping Wei, Jianfei Xiao, Shengwen Bai, Bin Jiang, Chao He, Guangsheng Huang, Dingfei Zhang, Fusheng Pan
Summary: Novel turned-bearing extrusions (TBE) are developed to improve the strengths of AZ31 alloy sheets by introducing additional shear strain during preparation. Numerical simulations show that high strain leads to grain refinement through dynamic recrystallization (DRX), but also increases temperature and consumes dislocations. The SC-TBE sheet exhibits finer grains and a higher residual dislocation density compared to the DC-TBE sheet or conventional extrusion (CE) sheet. Overall, these findings provide insights for developing stronger Mg alloy sheets.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Xiu-Fen Ma, Hong-Yi Li, Weiwei Ren, Daibo Gao, Fuyu Chen, Jiang Diao, Bing Xie, Guangsheng Huang, Jingfeng Wang, Fusheng Pan
Summary: Rechargeable magnesium batteries (RMBs) are considered as promising next-generation energy storage devices due to their high safety and low cost. Vanadium-based compounds, with their large family and versatile advantageous structures, are highly competitive as electrode materials for RMBs. This review summarizes the structural characteristics, electrochemical performance, and refinement methods of vanadium-based materials in RMB cathodes, as well as their limited use in RMB anodes. Common strategies to improve the electrochemical performance are discussed, and potential development directions are proposed, including electrode materials, electrolytes, and separator materials. RMBs are expected to play a leading role in the energy storage era.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yuhang Guo, Liping Shao, Runnan Zhang, Wenqing Gao, Shiyao Yu, Yuqian Du, Guangzhaoyao Yang, Fusheng Pan, Tong Li, Zhongyi Jiang
Summary: This study proposed a surface segregation strategy in thermally induced phase separation (TIPS) to achieve in-situ surface modification of poly (4-methyl-1-pentene) (PMP) membranes. Hetero-structured PMP membranes with hydrophilic hemocompatible surface and hydrophobic body were obtained. The hydrophilic surface effectively improved membrane hemocompatibility through hydration layer effect and steric hindrance effect, reduced platelet adhesion significantly, and prolonged coagulation time within the normal physiological range. The membrane exhibited optimal gas permeability and blood oxygenation performance, as well as resistance to plasma leakage for more than two months.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Zhiming Zhang, Hong Wu, Li Cao, Meidi Wang, Hongjian Wang, Fusheng Pan, Zhongyi Jiang
Summary: Graphene oxide (GO) lamellar membranes suffer from low flux and poor stability for practical applications due to tortuous transport pathways and weak interlamellar interactions. In this study, porous vermiculite (PVMT) nanosheets were incorporated into the GO-based membranes to establish fast and robust water-selective pathways. PVMT nanosheets provided in-plane pores, reducing the tortuosity and mass transport distance. The hydrophilicity and interlayer distance were enhanced by PVMT nanosheets, contributing to water-selective transport. The resulting membranes exhibited excellent dehydration performance with increased permeation flux and separation factor compared to pristine GO/PTFE membranes, while maintaining stability for 192 h operation. This study may inspire further research in constructing mass-transfer pathways within lamellar membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Dongmei Pu, Xianhua Chen, Jingfeng Wang, Jun Tan, Jianbo Li, Hong Yang, Bo Feng, Kaihong Zheng, Fusheng Pan
Summary: The ageing behavior of as-extruded Ti-P/VW94 composites was studied. The peak hardness of the composites increased compared to the matrix alloy, with the 5% Ti-P/VW94 composite showing the highest peak hardness of 148.7 HV after aging for about 50 h. However, the hardness increments first decreased and then slightly increased with increasing Ti particle content due to the introduction of high-density dislocations by Ti particles.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yuhan Wang, Junyi Zhao, Sui Zhang, Zhiming Zhang, Ziting Zhu, Meidi Wang, Bohui Lyu, Guangwei He, Fusheng Pan, Zhongyi Jiang
Summary: A two-step method for fabricating COF nanosheets is proposed, involving framework assembly and functional group switching. The fabricated functionalized COF-316 membranes demonstrated excellent separation performance.
MATERIALS HORIZONS
(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)