Article
Nanoscience & Nanotechnology
Lei Tang, Fuqing Jiang, Huibin Liu, Saurabh Kabra, Biao Cai
Summary: High manganese steels, with low production cost and potential for excellent strength-ductility combinations, are being recognized as promising structural materials for cryogenic applications. The addition of 1 wt% Cu to the steel effectively improves yield strength (YS) and elongation, and increases stacking fault energy (SFE), delaying the formation of martensite. At lower deformation temperatures, tensile strength increases linearly, while stacking faults and dislocations are promoted, and SFE decreases linearly. Contributions to YS and flow stress from lattice friction, grain boundary, dislocation, deformation twins, and phase transformation were determined.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Multidisciplinary Sciences
Zongrui Pei, Shiteng Zhao, Martin Detrois, Paul D. Jablonski, Jeffrey A. Hawk, David E. Alman, Mark Asta, Andrew M. Minor, Michael C. Gao
Summary: Metallic alloys have been widely used in human civilization due to their balanced strength and ductility. This study proposes a possible mechanism based on the parameter kappa, which enhances the work-hardening ability of high-entropy alloys. The results offer a physical picture of the strengthening effects and can be used as a practical design principle for enhancing the strength-ductility synergy in metallic materials.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhichao Liu, Zhihua Nie, Xianjin Ning, Xiuchen Zhao, Xiaodong Yu, Fuchi Wang, Chengwen Tan
Summary: This study investigates the mechanical response and microstructural evolution of Ni-27 W alloys, finding that they exhibit a high strain hardening capacity mainly due to the dominance of planar slip mechanism in plastic deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yufan Wu, Ji Gu, Min Song
Summary: The trade-off between strength and ductility has been studied for a long time. Designing heterogeneous structures is considered a promising strategy to improve mechanical properties. Researchers fabricated a laminated Cu/Cu-6Al alloy with a graded interfacial region, which effectively relieves stress concentration and provides continuous working hardening ability. The alloy exhibits a combination of high strength and large ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Agnieszka Teresa Krawczynska, Michael Kerber, Przemyslaw Suchecki, Barbara Romelczyk-Baishya, Malgorzata Lewandowska, Daria Setman
Summary: The study investigates the impact of stacking fault energy on the microstructure evolution and mechanical properties of nanostructured metals under high pressure annealing. It demonstrates that pressure applied during annealing can lead to a more profound retardation of microstructure evolution in materials with low stacking fault energy. The study concludes that the twinning deformation mechanism generates a higher dislocation density and a lower grain size in the low stacking fault energy material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Junheng Gao, Suihe Jiang, Haitao Zhao, Yuhe Huang, Huairuo Zhang, Shuize Wang, Guilin Wu, Yuan Wu, Honghui Wu, Albert Davydov, William Mark Rainforth, Zhaoping Lu, Xinping Mao
Summary: By massive nano-precipitation, the grain sizes of a near medium Mn austenitic steel were successfully refined, leading to a transition of deformation mechanism and achieving a unique combination of high strength and large elongation.
Article
Nanoscience & Nanotechnology
Naveen Manhar Chavan, P. Sudharshan Phani, M. Ramakrishna, L. Venkatesh, Prita Pant, G. Sundararajan
Summary: Cold spray deposition involves unique combination of high strain rate and moderate to high strain deformation, leading to significant grain refinement and deformation twinning in Cu and Cu-Al alloys. Experimental observations align well with theoretical predictions, showing significant heterogeneity in cold spray coatings and identifying factors influencing hardness. Twin mediated deformation mechanism is found to explain the lower boundary strengthening in presence of fine twins.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Hao Shi, Fei Cao, Tongle Wang, Haidong Zhang, Huaibao Gao, Haotian Liu, Lei Gao, Juntao Zou, Yihui Jiang, Shuhua Liang
Summary: TiB2p/Cu composites were prepared by CAVHP combined with rolling. The rolling deformation eliminated the unclosed pores and achieved a uniform distribution of TiB2p. The cold rolled TiB2p/Cu composite exhibited remarkable comprehensive performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
N. Hashimoto, E. Wada, H. Oka
Summary: By investigating the effect of stacking fault energy on microstructural evolution in reduced activation high entropy alloys, it was found that the stacking fault energy increased with increasing Ni and Mn concentration in FeCrNiMn alloys. FeCr 0.8 Ni 1.5 Mn 1.5 had the highest stacking fault energy, and the yield strength and elongation of deformed FeCrNiMn alloys also showed Ni and Mn concentration dependence. Electron irradiation at 400 degrees C formed black dots and self-interstitial atom faulted loops in all FeCrNiMn alloys, but no observable voids. Comparing the microstructural evolution, FeCr 0.8 Ni 1.3 Mn 1.3 and FeCr 0.8 Ni 1.5 Mn 1.5 alloys showed less faulted loop formation and growth. Therefore, FeCrNiMn-based high entropy alloys can be developed as high irradiation resistant materials by controlling stacking fault energy with optimized element concentration.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
He Wei, Yinli Chen, Zulai Li, Quan Shan, Wei Yu, Di Tang
Summary: By conducting an in-depth exploration of the microstructure evolution and characterization of the dislocation density in Cu-Ni-Si-Co alloy, it was found that the alloy has good mechanical properties and electrical conductivity. The study also identified various structural features of the alloy, highlighting its potential for performance optimization and application.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Xiaolong Xu, Yongchao Hao, Ruifeng Dong, Hua Hou, Yuhong Zhao
Summary: Using the deep undercooling rapid solidification method, Cu based alloy was studied at different undercooling degrees. It was found that grain refinement occurred in both large and small undercooling ranges for the two alloys. EBSD analysis showed that the grain refinement structures differed in grain orientations for large and small undercooling. The refinement mechanisms were dendrite remelting and fragmentation for low undercooling alloy, and stress-induced recrystallization for high undercooling alloy. A sudden drop in grain size near critical undercooling was observed for the high undercooling alloy, providing direct evidence of grain refinement due to recrystallization in non-equilibrium solidification structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yasunori Abe, Satoshi Semboshi, Naoya Masahashi, Sung Hwan Lim, Eun-Ae Choi, Seung Zeon Han
Summary: Copper-indium (Cu-In) solid solution alloys exhibit effective solid solution strengthening without significantly decreasing the conductivity, making them suitable candidates for conductive spring wires. In this study, we investigated the microstructure, mechanical properties, and electrical properties of Cu-In alloy wires fabricated by severe drawing. It was found that high-density deformation twins were generated in the Cu-In alloy during the initial drawing stages, promoting grain refinement. The Cu-5.0 at. pct In alloy wire, drawn severely to an equivalent strain of 4.61, possessed ultrafine grains with excellent yield strength, tensile strength, and conductivity.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Jiajun Lu, Jinkai Wang, Kaiwei Wan, Ying Chen, Hao Wang, Xinghua Shi
Summary: In this study, a machine learning interatomic potential with a deep neural network method was developed for the TiAlNb ternary alloy based on a dataset built by first-principles calculations. The potential accurately predicted the macroscopic properties such as lattice constant and elastic constants, surface energies, vacancy formation energies, stacking fault energies, and the formation energy and stacking fault energy of α-TiAl doped with Nb. The potential was validated by experiments and found to be applicable under more practical conditions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ranming Niu, Xianghai An, Linlin Li, Zhefeng Zhang, Yiu-Wing Mai, Xiaozhou Liao
Summary: By adjusting the Al content in Cu-Al alloys to control stacking fault energy (SFE), the mechanical properties and deformation mechanisms of the materials can be manipulated. The study revealed that the influence of sample size on strength decreased with decreasing SFE or increasing Al content, and a theoretical model was proposed to explain this size dependency.
Article
Materials Science, Multidisciplinary
Jingcun Huang, Zhilei Xiang, Yuanchen Tang, Jihao Li, Gaoliang Shen, Guodong Shi, Xiaozhao Ma, Yilan Chen, Ziyong Chen
Summary: The interfacial precipitation of TiB2 in the composite has a significant impact on the composite's properties. The TiB2 surface serves as a nucleation site and has a good orientation relationship with D023-Al3Zr. After heat treatments, the TiB2 wall hinders the diffusion of solute atoms and enhances the local high solute atom concentration, providing a high precipitation driving force for interfacial precipitation.
MATERIALS CHEMISTRY AND PHYSICS
(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)