Article
Automation & Control Systems
Chengyu Wang, Yongchao Wang, Jing Peng, Qingyi Huang, Wufei Yang, Xuemei Chen
Summary: In this paper, an innovative method combining finite element method (FEM) and cellular automaton (CA) is proposed to predict the microstructure evolution of materials during shot peening. The model can obtain both macroscopic (stress-strain response) and microscopic (texture) properties of the material. A coupled experimental and numerical approach is used to establish the relationship between shot peening process parameters and grain size. The results show that shot peening-induced stresses have a significant impact on the mechanical behavior and grain size evolution of gradient materials.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
S. Lay
Summary: Geometrical calculations were used to evaluate the resistance of WC grain boundaries in WC-Co cemented carbides to transfer plastic deformation. It was found that E = 2 and E = 4 grain boundaries are more resistant to dislocation propagation compared to other grain boundaries, which could be controlled to tune the material properties.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Walaa Abdel-Aziem, Atef Hamada, Takehiko Makino, Mohsen A. Hassan
Summary: The study focused on the micro/meso-forming of commercially pure aluminum AA1070 through 4 deformation passes using ECAP at room temperature. The findings showed that as the number of passes increased, there was a transition from a non-uniform grain structure to a uniform ultrafine-grained structure, resulting in a significant improvement in hardness. Additionally, the micro/meso-scale ECAP was capable of developing a weak texture in the flow plane compared to the starting texture.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
J. -E. Brandenburg, J. Seo, K. Eto, D. A. Molodov, S. Tsurekawa
Summary: The study used nanoindentation to investigate the local mechanical properties near 1010 tilt grain boundaries in magnesium bicrystals with different misorientation angles. It was found that critical shear-stress for the second pop-in differed substantially for grain boundaries with different structures, indicating important mechanical property variations in these boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ren-E Dong, Amir Hossein Assari, Saeid Yaghoobi, Maryam Mahmoodi, Sahar Ghaderi
Summary: This study examined the microstructure evolution and thermal properties of Al/Ti composites with different volume fractions of Ti. The results showed that plastic instabilities occurred within the composites, leading to a uniform distribution of Ti fragments in the Al matrix. The grain size of the composites decreased with an increase in Ti content, indicating a gradient in grain size. Furthermore, the thermal properties of the composites increased with temperature but decreased with an increase in passes. However, the thermal conductivity, thermal diffusivity, coefficient of thermal expansion, and specific heat capacity of the composites decreased with an increase in Ti content.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
O. Sitdikov, E. Avtokratova, M. Markushev
Summary: The study revealed that the grain refinement of Al-Mg-based alloy during multidirectional isothermal forging occurs through continuous dynamic recrystallization controlled by nanosized precipitates, resulting in the formation of (ultra) fine grain structure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sijia Wang, Guoliang Xie, Jie Yang, Feixiang Liu, Xinhua Liu
Summary: Grain refinement in a nano-scaled Al2O3 dispersion-strengthened Cu alloy occurs during compression distortion. The plastic deformation mechanism of the alloy is investigated by studying the evolution of grain size, dislocation density and distribution, and texture orientation. The compression process is divided into four stages, and the grains split into refined sub-grains due to the pinning effect of nano-scaled Al2O3 particles. The study provides insights into the strengthening mechanism and guidance for the design of Cu alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jann-Erik Brandenburg, Luis A. Barrales-Mora, Sadahiro Tsurekawa, Dmitri A. Molodov
Summary: The migration behavior of grain boundaries with misorientations close to the & sigma;3 CSL orientation relationship in high purity Al bicrystals was investigated. It was found that the ability of some boundaries to move under capillary driving force depends on the initial boundary inclination. The measured migration activation enthalpy for one specific boundary was found to be the lowest among previous experiments in Al bicrystals of the same purity.
Article
Engineering, Mechanical
Guanyu Deng, Yan Chong, Lihong Su, Lihua Zhan, Peitang Wei, Xing Zhao, Liang Zhang, Yanzhong Tian, Hongtao Zhu, Nobuhiro Tsuji
Summary: The study found that the powder nano-grained Ti6Al4V alloy has lower friction coefficient and higher wear resistance compared to its coarse-grained counterpart, and that sliding wear can alter its nanomechanical properties and microstructure evolution, which depends on the initial microstructural features.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Optics
Jiangdong Cao, Xueyu Cao, Bochen Jiang, Fang Yuan, Da Yao, Jian Huang
Summary: The study found that high power laser shock processing induced microstructural evolution in the Ni-based superalloy GH202, including dislocation slip and twinning. LSP also promoted dynamic recrystallization and the formation of dislocation arrays and subgrains within 250 microns in depth. Beyond 200 microns, the dislocation density significantly decreased.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Anna Bodyakova, Maksim Tkachev, Georgy Raab, Rustam Kaibyshev, Andrey N. Belyakov
Summary: The effect of severe plastic deformation through ECAE-Conform and cold rolling on the microstructures of Cu-0.1Cr-0.1Zr alloy was investigated. The results showed that an increase in ECAE-Conform strain improved grain refinement and subsequent cold rolling further led to grain size reduction and strengthening. The fraction of ultrafine grains with a size of 160 nm increased with an increase in the number of ECAE-Conform passes, resulting in a higher yield strength of above 550 MPa.
Review
Materials Science, Multidisciplinary
Zeinab Savaedi, Reza Motallebi, Hamed Mirzadeh, Rouhollah Mehdinavaz Aghdam, Reza Mahmudi
Summary: This overview article reviews the superplastic behavior of medical magnesium alloys. It discusses the basics of superplasticity and superplastic forming via grain boundary sliding (GBS). The properties of biomedical Mg alloys are tabulated. The critical discussion focuses on the superplasticity of biocompatible Mg-Al, Mg-Zn, Mg-Li, and Mg-RE alloys, emphasizing the influence of grain size, hot deformation temperature, and strain rate on tensile ductility.
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
D. F. Shi, Z. J. Zhang, Y. H. Yang, Y. Z. Zhou, R. Liu, P. Zhang, Z. F. Zhang
Summary: Nickel-based single-crystal superalloys are widely used in manufacturing aeroengine turbine vanes due to their excellent high-temperature performance. However, the presence of low-angle grain boundaries (LAGBs) during their manufacture can weaken the mechanical properties of the superalloys. In this study, the relationship between grain boundary misorientation (GBM) and fatigue properties of superalloys at elevated temperatures was systematically investigated using six different bicrystals with varying tilt LAGBs. The study found that an increase in GBM led to an increase in GB precipitates and cast micropores, resulting in a decrease in fatigue life and fatigue strength. The study also established a quantitative fatigue strength prediction model and evaluated the coupling effect of cast micropores and GBM on the fatigue damage mechanisms of the bicrystals.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Xiaoye Zhou, Hui Fu, Ji-Hua Zhu, Xu-Sheng Yang
Summary: In this study, the single point diamond turning technique was used to improve the mechanical properties of magnesium alloys. By refining the surface grains to the nanometer scale, the surface hardness was enhanced. Molecular dynamics simulations were conducted to study the atomic plastic deformation mechanism and the effects of different parameters. The results suggest that increasing the rake angle, cutting speed, and cutting depth can achieve better grain refinement.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Ceramics
Haiyue Xu, Ji Zou, Weimin Wang, Hao Wang, Wei Ji, Zhengyi Fu
Summary: High-pressure sintering can effectively produce dense ceramics at relatively low temperatures. Research shows that sintering densification temperature and starting threshold temperature of grain growth increase with grain size and applied pressure. Ceramics sintered under high pressure and low temperature exhibit higher grain boundary energy, residual stress, and dislocation density compared to samples sintered without additional pressure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Textiles
Weihua Gu, Fuguo Li, Qinchao Gao, Chengzhi Zhuo, Zhong Lu
Summary: The design of metallic card clothing in the textile industry has traditionally been based on operational experience, but recent research suggests that airflow plays an important role in the carding process. Computational fluid dynamics (CFD) simulation has shown to be helpful in analyzing airflow, with a new double teeth design showing potential for improving production efficiency.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Qingfen Ma, Yun Zheng, Hui Lu, Jingru Li, Shenghui Wang, Chengpeng Wang, Zhongye Wu, Yijun Shen, Xuejin Liu
Summary: The ocean thermal energy conversion (OTEC) is a potential alternative for traditional power plants in tropical islands and coastal regions, especially when coupled with seawater desalination using membrane distillation (MD) to improve overall efficiency. An innovative OTEC system combining power generation and water production sub-cycles was proposed in this study, demonstrating significant improvements in thermal efficiency and water production rate. Economic analysis showed a potential profit increase, particularly in Hawaii and Rainbow Beach, due to additional water production.
Article
Materials Science, Multidisciplinary
Chengpeng Wang, Junkai Fan, Wu Zhao, Wei Liu
Summary: A novel upsetting method named cone end billet upsetting (CEBU) is proposed to restrain bulging in the upsetting of the larger height-diameter ratio (LHDR) billet. The forming characters of a cylinder LHDR billet were analyzed using the commercial finite element software DEFORM. Virtual orthogonal tests were conducted to uncover the influence factors such as billet end taper, pressing speed, and billet height. The results show that CEBU effectively restrains bulging and is a promising method to control bulging in the upsetting of LHDR billet.
MATERIALS SCIENCE-MEDZIAGOTYRA
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Xu, Fuguo Li, Xueli Wang
Summary: This study develops a user-friendly anisotropic yield function for capturing the plastic anisotropy of sheet metals. The proposed function improves simulation efficiency and reduces experimental cost by balancing predictability and cost in parameter calibration. The results show that the function performs well in describing the anisotropic behavior and hardening behavior of different materials.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Farah Siddique, Fuguo Li, Jingchuan Yin, Jianwen Fan, Mirza Zahid Hussain, Youfu Zheng, Qinghua Li, Qian Zhao
Summary: The present work investigates the deformation behavior of an ultra-high strength low alloy steel under different strain rates and temperatures. The results reveal the dominance of work hardening over thermal softening at high temperature and high strain rate. Different modes of plastic deformation, such as slip, twinning, and shear bands, are observed at different temperatures and strain rates. The occurrence of adiabatic shear bands at high temperature leads to crack initiation and propagation. The modified Johnson-Cook model shows better agreement with experimental values compared to the original Johnson-Cook model.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Xu, Fuguo Li, Xueli Wang, Guohao Zhang
Summary: The anisotropic fracture behavior of 7075-T6 aluminum alloy sheet was investigated through tensile tests and digital image correlation technique. The results showed the influence of loading directions and stress state on failure strains. Fracture morphology was observed to understand the failure model and mechanisms. An anisotropic fracture model based on DF2016 was used to describe the fracture behavior. Additionally, the impact of plastic anisotropy on the formability of the sheet was examined.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Qinghua Li, Yong Li, Fuguo Li, Yong Wang, Jiongjiong Zhang, Pengfa Feng, Jiang Li
Summary: This research tested the simple deformation in single tension, single compression, single torsion, and the combined deformation in tension-torsion and compression-torsion of annealed pure molybdenum. Various characterizations such as uniaxial compressive response, microhardness test, fractography, microstructure, and texture analysis were conducted. The results showed that the yield strength was improved in all samples, but was most enhanced after compression-torsion deformation. The microhardness increased gradually from the center to the edge in cross section, with the highest increase observed during compression-torsion deformation. All deformation modes led to grain size refinement, with tension-torsion and compression-torsion showing more obvious effects, especially compression-torsion.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Xu, Fuguo Li, Xueli Wang
Summary: A new anisotropic ductile fracture model was developed in this paper to depict the anisotropic ductile fracture behavior of different metallic materials. The experimental results showed that the proposed model accurately predicted the non-directionality of equi-biaxial tensile fracture strain and accurately depicted the anisotropic ductile behavior of these metals under proportional loading conditions.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Siddique Farah, Fuguo Li, Hussain Mirza Zahid, Qian Zhao, Jianwen Fan, Yiwen Tang, Jingchuan Yin
Summary: This study investigates the deformation behavior and plastic instability of the newly developed ultra-high strength low alloy steel XF1700 over a wide temperature range and different strain rates. By using the chemical composition of the alloy system in JMatPro software, a four-parameter exponential model is established to predict the deformation mechanism at different temperature zones. EBSD analysis is conducted for microstructural analysis. The material parameters describing deformation behavior and plastic instability are obtained through a nonlinear regression model, and the four-parameter exponential model is found to be in excellent agreement with the experimental data. The overall average absolute relative error (AARE) is 4.42%.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Farah Siddique, Fuguo Li, Mirza Zahid Hussain, Qian Zhao, Qinghua Li
Summary: High-speed impact at strain rates >10(3) s(-1) has common characteristics in energy absorption and adiabatic temperature rise. An ultra-high strength low alloy steel subjected to high-speed impact was studied, with a focus on energy absorption driven by thermo-kinetics phenomenon and its correlation with target plate thickness. Deformation characteristics were explained using an analytical model that relates absorbed energy and plate thickness. EBSD and FE analysis revealed the formation of adiabatic shear bands due to adiabatic temperature rise in specific zones, while the radial direction experienced increased stress resulting in a higher proportion of recrystallized grain structure. Micro hardness testing confirmed the differences in hardness between the distinct zones.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Shengqing Hu, Kai Wang, Simu Ma, Haoran Qi, Naijun He, Fuguo Li
Summary: A356 aluminum alloy reinforced by AlCoCrFeNi high-entropy alloy (HEA) particles was fabricated using friction stir processing (FSP) and subsequent heat treatment. Solution and aging treatments were performed to control the interface microstructure and explored its effect on tensile properties. The interface showed a dual-layered core-shell structure, with the shell thickness increasing with solution time. The microstructure in the shell layers consisted of a solid solution with increasing aluminum content, forming radial-shaped solid solution phase close to the core and scattered solid solution grains with high Ni content close to the matrix alloy. The FSPed composite exhibited enhanced tensile stress and strain compared to the FSPed A356 alloy. The overgrowth of the shell layer decreased tensile strength and ductility due to the formation of a radial-shaped solid solution phase.
Review
Chemistry, Physical
Miaomiao Wan, Fuguo Li, Kenan Yao, Guizeng Song, Xiaoguang Fan
Summary: Deformation instability is a phenomenon of non-uniform and unstable deformation of materials under stress loading conditions, and it is influenced by material characteristics, structural geometry, stress state, and environmental conditions. This paper aims to comprehensively review the existing literature on metal deformation instability, including its fundamental principles, analytical methods, and engineering practices. It provides a reference for metal bearing analysis and deformation instability design.
Article
Chemistry, Physical
Farah Siddique, Fuguo Li, Mirza Zahid Hussain, Qian Zhao, Qinghua Li
Summary: A new layered heterostructure composite material system consisting of TC4 and 2024Al alloy was developed and analyzed for its enhanced absorption capability and anti-penetration behavior. The modified Florence model and numerical simulation validated each other's findings regarding the energy absorption of the system. The compression test results indicated that two ductile materials with a hardness gradient can be used as a replacement for a brittle-ductile combination in a layered structure.
Article
Crystallography
Kai Wang, Haoran Qi, Simu Ma, Linrui Wang, Naijun He, Fuguo Li
Summary: The effects of nickel on the solidified microstructure and tensile properties of a 7075 aluminum alloy were investigated. It was found that increasing nickel content refined the primary alpha (Al) grains and promoted the formation of divorced eutectic structure, but excessive nickel content resulted in coarsening of the eutectic phases and reduction in mechanical properties.
Article
Materials Science, Multidisciplinary
Qian Zhao, Fuguo Li, E. Zhu, K. R. Gopi, Siddique Farah, Xuehan An, Kenan Yao, Jiang Li, Anisah Farooq Hashmi, Leyi Liu
Summary: This study investigates the hot deformation behavior and microstructural evolution of Al-Mg-Si alloys through isothermal compression tests. The results show that the correlation coefficient of recrystallization decreases with increasing temperature and decreasing strain rate. The softening mechanism of dynamic recrystallization is enhanced in the presence of dynamic recovery, and different dynamics recrystallization behaviors with different mechanisms are identified.
METALS AND MATERIALS INTERNATIONAL
(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)
