Article
Materials Science, Multidisciplinary
Hassan Jafari, Alireza Mazloumian, Mohammad Meghdad Fallah
Summary: The study indicates that increasing the Al2O3 content can enhance the hardness and wear resistance of magnesium alloy matrix composites. The extrusion temperature significantly affects the wear resistance of composites, with samples extruded at 350 degrees Celsius demonstrating the best wear resistance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Samuel Olukayode Akinwamide, Ojo Jeremiah Akinribide, Peter Apata Olubambi
Summary: Aluminium matrix composites (AMC) has been widely used in the engineering sector due to its superior qualities. The addition of silicon carbide and ferrotitanium particles in stir cast aluminium-based composite can improve its properties. Stir casting technique ensures homogeneous dispersion of the reinforcement particles within the aluminium matrix, leading to enhanced microstructural, mechanical, and tribological properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
V. G. Shanmuga Priyan, S. S. Kanmani
Summary: In this study, AA6063-Silicon carbide composites were fabricated using conventional stir casting. The agglomeration of reinforcement particles was reduced by applying ultrasonic waves to the composite melt. The mechanical properties of the composites improved with an increase in the weight percentage of SiC up to 4%, and ultrasonic waves further enhanced the mechanical properties.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Kowit Ponhan, David Weston, Karl Tassenberg
Summary: In this study, AZ91D magnesium matrix nanocomposites reinforced with SiC nanoparticles were fabricated using a master pellet feeding technique and stir casting with ultrasonic treatment. The microstructure and mechanical properties of the composites were investigated. The use of a master pellet feeding approach resulted in a more uniform dispersion of SiC nanoparticles, while the original nanoparticle feeding method led to particle agglomeration. Increasing the SiC content improved the hardness and tensile properties of the composites, but excessive SiC content caused a decrease in ultimate tensile strength and elongation due to increased porosity and particle clusters.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Crystallography
Jayavelu Udaya Prakash, Sunder Jebarose Juliyana, Sachin Salunkhe, Sharad Ramdas Gawade, Emad S. Abouel Nasr, Ali K. Kamrani
Summary: This study attempts to produce AMCs of LM5 aluminum alloy reinforced with ZrO2 using the stir casting technique. The weight percentage of ZrO2 was changed and various tests were conducted to determine the properties of the composites. The results indicate that the AMC with 9% ZrO2 has the highest density, hardness, tensile strength, compressive strength, and toughness.
Article
Chemistry, Physical
Donghyun Lee, Junghwan Kim, Sang-Kwan Lee, Yangdo Kim, Sang-Bok Lee, Seungchan Cho
Summary: Boron carbide reinforced aluminum alloy composites with continuous multi-interphases were successfully fabricated by stir casting process. The formation of interphases at the B4C/Al6061 interface during the process was consistent with thermodynamic calculations, suggesting possible quantitative compositions of B4C and Al6061 for forming the mentioned interphases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Automation & Control Systems
Catarina Vidal, Pedro M. M. Ferreira, Patrick L. L. Inacio, Francisco B. B. Ferreira, Duarte Santiago, Pedro Meneses, Rui J. C. Silva, Telmo G. G. Santos
Summary: Upward friction stir processing (UFSP) is a new variant of friction stir processing that utilizes two sheets with functional particles to control and promote a more uniform distribution. By adjusting process parameters, the particles' distribution in the stir zone of metallic composites can be improved, especially when multi-passes are performed towards the retreating side. The UFSP technique can significantly affect material's properties, such as mechanical strength, and careful parameter selection is crucial to optimize performance.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Kothuri Chenchu Kishor Kumar, Bandlamudi Raghu Kumar, Nalluri Mohan Rao
Summary: The study showed that adding SiC reinforcement can significantly reduce the grain size of AZ31D magnesium alloy matrix, improving its mechanical properties. The AZ31D composite with 4% SiC reinforcement exhibited the highest compressive strength and hardness. The research found that the homogeneous dispersion of SiC particles and effective load transfer play a key role in enhancing the properties of AZ31D composite.
Article
Materials Science, Multidisciplinary
Fu-xiang Cao, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Wei Liang, Jian-feng Fan
Summary: This study successfully prepared SiCp/2024Al composite sheets through two-step deformation, addressing formability issues and investigating the synergistic enhancement between CuAl2 phase and SiCp in mechanical properties. The two-step deformation significantly improved the uniform distribution of SiCp and CuAl2 phases, leading to enhanced performance of the composite materials.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
M. Saravana Kumar, S. Rashia Begum, C. Pruncu, Mehdi Shahedi Asl
Summary: The stir casting process is popular for creating particle reinforced metal matrix composites, but achieving a homogeneous distribution of reinforcement particles is challenging. This study investigated the synthesis of Al-SiC composite materials and the impact of SiC particle distribution on mechanical properties using a glycerol-water based model. The results showed that specific parameters such as viscosity, impeller position, stirring speed, and blade angle can affect the distribution of reinforcement particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Diqing Wan, Jiajun Hu, Houbin Wang, Yinglin Hu, Lili Li
Summary: Novel oxide/Mg composites with ultra-high damping capacity were successfully prepared using in situ oxidation and particle-dispersed methods, showing increased dislocation density and introduced interface damping. Temperature-dependent damping tests revealed two damping peaks related to dislocation interactions and grain boundary sliding.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Kaiguang Luo, Hanqing Xiong, Yun Zhang, Hao Gu, Zhide Li, Charlie Kong, Hailiang Yu
Summary: AA1050 metal matrix composites (MMCs) reinforced by Al0.5CoCrFeNi high-entropy alloy particles (HEAp) were prepared using stir casting and subsequent rolling techniques. The addition of 3 wt% HEAp led to a significant increase in ultimate tensile strength compared to AA1050. Cryorolling showed better mechanical properties than room temperature rolling, with increasing differences in mechanical properties observed with higher rolling deformation and lower HEAp content. The presence of voids in MMCs after room temperature rolling was not observed in cryorolled MMCs, highlighting the impact of cryogenic temperatures on microvoids and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Pooja Verma, Gayatri Paul, Joyjeet Ghose, Vijay Pandey
Summary: In this study, graphite is used as the reinforced phase in aluminum metal matrix nanocomposites (AMMNCs) due to its high strength and lubricating properties. The AMMNCs are processed using ultrasonic-stir-squeeze casting process to ensure homogeneity and minimize porosity. Characterization techniques like x-ray diffraction and scanning electron microscopy are used to investigate the phase and microstructure. AMMNCs show lower density and improved hardness compared to as-cast aluminum alloy (AA2014). The addition of graphite enhances the wear properties of AMMNCs, but the wear rate is affected by factors such as graphite concentration and applied load. Post-tribological characterization provides detailed information on the influence of hardness and elastic modulus on the tribological properties of AMMNCs.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Fenjun Liu, Yapeng Li, Zhiyong Sun, Yan Ji
Summary: The influences of various reinforcement particle compositions on the phase compositions, microstructure characteristics, corrosion resistance, and tribological behavior of AZ31 magnesium matrix composites (MMCs) were studied. The MMCs showed improved characteristics compared to the as-received AZ31 alloy, with different corrosion potentials and currents, as well as varied wear mechanisms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
P. Kumaravelu, Jayakrishna Kandasamy
Summary: The poor load-bearing ability of Mg-AZ91D alloy can be overcome by introducing Ca2SiO4 as an effective reinforcement. Mg-Ca2SiO4 composites with different weight percentages were prepared using stir casting technique. The addition of Ca2SiO4 particles improved the mechanical behavior of Mg-Ca2SiO4 composite, with higher weight percentages leading to increased hardness, tensile strength, compression strength, and impact strength. Various characterization tools were employed to study the strengthening and failure mechanisms associated with these composites.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Metallurgy & Metallurgical Engineering
X. Q. Liu, X. G. Qiao, R. S. Pei, Y. Q. Chi, L. Yuan, M. Y. Zheng
Summary: The influence of extrusion rate on the microstructure and mechanical properties of the AXM1104 alloy was studied. With increasing extrusion rate, the grain size and particles diameter increased, while the grain boundary segregation and basal fiber texture decreased. The tensile yield strength decreased and the elongation to failure increased as the extrusion rate increased.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Shilei Wang, Kaibo Nie, An Yang, Kunkun Deng
Summary: The influence of different Ca/Al mass ratios on the microstructure, phase evolution, and mechanical properties of Mg-Al-Ca-Mn alloys was investigated. It was found that increasing the Ca/Al ratio led to the transformation of the secondary phases and refinement of the grain size. The secondary phases not only refined the grains but also hindered dislocation migration, resulting in the strengthening of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Electrochemistry
Xin Lv, Kunkun Deng, Cuiju Wang, Kaibo Nie, Quanxin Shi, Haoyi Niu
Summary: Through immersion, electrochemical, and Mg-air battery tests on extruded AZ91 alloy and 0.5 μm SiCp (0.5 vol.%)/AZ91 composite, it is found that the introduction of submicron SiCp can reduce the corrosion rate and improve the discharge performance of the alloy. This improvement is attributed to the refined grains, precipitates, and weakened basal texture resulting from the addition of submicron SiCp. This study provides new ideas for achieving the synergistic improvement of corrosion resistance and discharge performance of magnesium alloy.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Yuanqing Chi, Jinwei Liu, Zhijie Zhou, Shouzhong Wu, Weiqing Liu, Mingyi Zheng
Summary: This study mainly investigates the microstructure, texture, and mechanical properties of Mg-Gd-Y alloys (Mg-8.5Gd-2.5Y-0.3Zr (wt%) (0Zn) and Mg-8.5Gd-2.5Y-0.5Zn-0.3Zr (wt%) (0.5Zn) alloys) under indirect extrusion at different temperatures. The addition of 0.5 wt% Zn promotes the dynamic precipitation of beta-Mg5RE phases, resulting in a well-distributed distribution in the 0.5Zn alloy compared to a local distribution in the 0Zn alloy. The presence of zinc and the extrusion temperature influence the texture formation and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Industrial
Zijian Zhang, Lin Yuan, Mingyi Zheng, Qinghe Wei, Debin Shan, Bin Guo
Summary: This study developed a large-scale AZ80 magnesium alloy sample through a two-step MDF process and artificial aging. The sample exhibits uniform mechanical properties and good plasticity, making it suitable for load-bearing components. Furthermore, this process can benefit the general application of magnesium alloys since the excellent mechanical properties do not rely on the addition of specific elements.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
S. Z. Wu, Y. Q. Chi, G. Garces, X. G. Qiao, M. Y. Zheng
Summary: The Mg96Y2Ni2 (at. %) alloy with a volume fraction of 50% of LPSO phase was processed by extrusion and ECAP. Different microstructures of bimodal alpha-Mg matrix and fully dynamic recrystallized matrix were obtained by controlling the processing parameters, and the relationship between microstructure and tensile properties was investigated. The extruded alloy at 390 degrees C showed ultrahigh tensile yield strength but low elongation to failure, while the alloy extruded at 450 degrees C exhibited a balanced strength-ductility behavior. Fully recrystallized ultra-fine Mg grains contributed to the increase of elongation to failure. This work provides theoretical guidance for developing Mg-LPSO two-phase alloys with excellent strength-ductility synergy.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
C. C. Li, Z. H. Xia, X. G. Qiao, I. S. Golovin, M. Y. Zheng
Summary: The study investigated the influence of Mn content (0.4, 0.8, 1.2 wt.%) on the microstructure and mechanical properties of as-extruded dilute binary Mg-Mn alloys. Increasing Mn content resulted in a decrease in the volume fraction and size of dynamically recrystallized (DRXed) grains. Segregation of Mn atoms and nano alpha-Mn dynamical precipitates were observed at the grain boundaries, with the amount of precipitates increasing with Mn content. Tensile tests showed that Mn content significantly affected mechanical properties, with the Mg-0.8 wt.% Mn alloy exhibiting excellent ductility at room temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Composites
Li Zhang, Kun-kun Deng, Kai-bo Nie, Cui-ju Wang, Chao Xu, Quan-xin Shi
Summary: GFs/ZX50 (graphite flakes/Mg-5Zn-0.5Ca) composites were successfully fabricated by ultrasonic-assisted semi-solid stirring followed by extrusion process. The microstructure observation shows that hot extrusion effectively regulates the orientation of GFs. The GFs/ZX50 composites exhibit excellent thermal conductive property of -145.6-174.2 W/(m center dot K) and high yield strength of -386.8-407.8 MPa. The excellent strength-thermal conductivity synergy of the composites is mainly attributed to the highly orientated GFs, the clean Mg-graphite interface, the ultrafine grains, and the MgZn2 nano-precipitates.
COMPOSITES COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xuanchang Zhang, Hailong Shi, Xiaojun Wang, Shuai Zhang, Peng Luan, Xiaoshi Hu, Chao Xu
Summary: AZ31 magnesium alloy was successfully manufactured by the electron beam additive manufacturing (EBAM) technique. The microstructure and mechanical properties of the EBAM samples were analyzed under different energy densities and deposition passes. The results showed that the energy density significantly influenced the manufacturability of the sample, and the sample with an energy density of 1.432 x 1010 Jm−3 exhibited the best manufacturability. The EBAM specimens demonstrated excellent tensile strength and elongation, attributed to dispersion strengthening and grain refinement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Quan-xin Shi, Cui-ju Wang, Kun-kun Deng, Yi-dan Fan, Kai-bo Nie, Wei- Wei-Liang
Summary: The present work investigates the impact of bimodal microstructure on the work hardening and softening behaviors of Mg-6Zn-1Gd-0.3Ca alloy. The study also discusses the grain refinement mechanism through EBSD analysis. The results reveal that the work hardening capacity of the alloy increases with the volume fraction of fine recrystallized grains due to increased dislocation storage rate caused by grain coarsening. The stress reduction value in the early stage of deformation is the highest for the alloy with fine recrystallized grains, providing a greater driving force for softening effect. However, the stress reduction values decrease with the increase of fine recrystallized grains in the later stage of deformation. Furthermore, the analysis indicates that dynamic recrystallization plays a significant role in the formation of fine recrystallized grains in the Mg-6Zn-1Gd-0.3Ca alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Peitang Zhao, Xuejian Li, Hailong Shi, Xiaoshi Hu, Chunlei Zhang, Chao Xu, Xiaojun Wang
Summary: In this study, graphene reinforced magnesium matrix composites were prepared using the in situ liquid-state method. The tensile strength of the composites was improved by increasing the content of graphene nanoparticles (GNPs). Additionally, the composites exhibited a significant plastic deformation stage, with the ductility of the 0.12 GNPs/Mg6Zn composites reaching 27.6%. Thus, this novel preparation method has great potential for fabricating Mg matrix composites with high strength and high ductility.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xin Lv, Kunkun Deng, Cuiju Wang, Kaibo Nie, Xiaogang Wang, Quanxin Shi
Summary: The effect of submicron SiCp content on the corrosion resistance of homogenized AZ91 alloy was investigated. The results showed that the addition of 0.5 vol.% submicron SiCp significantly improved the corrosion resistance, reducing the weightless corrosion rate from 4.44 mm/y to 0.68 mm/y. However, the corrosion resistance decreased with increasing submicron SiCp concentration.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Hailong Shi, Xiaojun Wang, Yeyang Xiang, Chunlei Zhang, Xuejian Li, Chao Xu, Xiaoshi Hu, Weimin Gan
Summary: Constructing a layered structure is an effective approach to achieve a balance between strength and toughness. The toughening mechanisms for metal matrix composites include crack deflection and stress concentration mitigation. The study found that GNS layers can promote dislocation emission and alleviate stress concentration, enhancing the toughness of the composite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hailong Shi, Xiaojun Wang, Chunlei Zhang, Xuejian Li, Xiaoshi Hu, Weimin Gan, Chao Xu
Summary: In this study, bicrystal microstructure of graphene nanosheets reinforced copper matrix laminated composites was investigated to understand the deformation behavior. Various analysis methods were applied to identify the activated slip systems and deviations in trace angle. The findings provide valuable insights for exploring the underlying deformation mechanisms in polycrystalline materials.
MATERIALS CHARACTERIZATION
(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)