Article
Nanoscience & Nanotechnology
Jing Yang, Daoxin Liu, Mengyao Li, Zhencheng Ren, Dan Liu, Xingchen Xu, Xiaohua Zhang, Hao Zhang, Junfeng Xiang, Chang Ye
Summary: This study investigates the evolution mechanism of surface gradient nanostructure induced by the ultrasonic surface rolling process (USRP) in GH4169 superalloy. Characterization using transmission electron microscopy reveals that repeated impacts from USRP produced a gradient nanostructure with a thickness of -330 µm on the material's surface. The topmost surface exhibits equiaxed nanograins with an average grain size of -30 nm, with grain size increasing with depth. The study also explores the formation of dislocations, deformation twins, and stacking faults in the nanocrystallization process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Lichao Gong, Yongzhi Pan, Chao Peng, Xiuli Fu, Zhenfeng Jiang, Shuai Jiang
Summary: Ultrasonic surface rolling processing (USRP) significantly improves the surface integrity and wear resistance of Cr12MoV steel. The treatment refines the grain of the plastic deformation layer, increases the surface hardness and residual compressive stress. With the increase of treatment times, the thickness of the plastic deformation layer increases and the surface carbide decreases, which helps to inhibit crack propagation.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Pengyi Li, Shan Hu, Yanxiong Liu, Lin Hua, Fei Yin
Summary: Surface nanocrystallization of metals and alloys can be achieved through high-frequency ultrasonic shot peening (USP), which improves the mechanical properties of the materials. This study investigated the microstructure evaluation, plastic strain and stress distribution of 316L stainless steel during USP using experimental and numerical simulation methods. The research findings indicate that high-frequency USP is an effective method for producing large-scale bulk nanocrystalline materials, and finite element simulation helps in understanding the relationship between process parameters and microstructure evaluation.
Article
Materials Science, Multidisciplinary
Jing Han, Cong Wang, Yuanming Song, Zhiyuan Liu, Jiapeng Sun, Jiyun Zhao
Summary: The ultrasonic surface rolling (USR) technique has been used to improve the corrosion resistance and mechanical properties of Mg alloy casting parts. The USR sheet exhibits significant enhancements in strength, hardness, and corrosion resistance without sacrificing ductility. This method can be considered as an additional and last working procedure in the production of high-performance Mg alloy casting parts.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Engineering, Mechanical
Y. Z. Li, Z. Y. Liang, M. X. Huang
Summary: This study investigates the effect of warm rolling on the deformation mechanisms of TWIP steel. It is found that while dislocation multiplication always controls the maximum flow stress, deformation twinning becomes increasingly important for steels with larger warm rolling reductions. The twinning kinetics is enhanced by the high dislocation densities caused by warm rolling, leading to an enhancement of twinning-induced hardening.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
G. Y. Zheng, X. Luo, Z. D. Kou, B. Huang, Y. Q. Yang
Summary: This paper systematically investigates the microstructural evolution of Al-Zn-Mg-Cu alloy during ultrasonic surface rolling process. The results show that the microstructural evolution at different depths of the surface deformation layer is basically the same but faster closer to the surface. The basic microstructural evolution order of the alloy includes scattered dislocation, dislocation cells, elongated dense dislocation cell walls, thick laminated structure, and nanolaminated structure. The study provides a theoretical basis for adjusting the actual processing technology.
MATERIALS CHARACTERIZATION
(2022)
Article
Optics
Xiongfeng Hu, Shengguan Qu, Zengtao Chen, Peng Zhang, Zhiyuan Lu, Fuqiang Lai, Chenfeng Duan, Xiaoqiang Li
Summary: The effects of DLSH and USR on the material properties and rolling contact fatigue behaviors of 25CrNi2MoV steel were investigated. The results showed that the combination of DLSH and USR improved the surface quality, increased surface hardness, and obtained beneficial surface compressive residual stress. The rolling contact fatigue life of the treated samples was significantly increased compared to the untreated samples.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Qing Sun, Ming Yang, Yun Jiang, Lei Lei, Yan Zhang
Summary: The corrosion resistance of 7075 aluminum alloy treated by ultrasonic surface rolling process (USRP) in a chloride environment was investigated. The effects of different USRP passes on the surface state, surface microstructure, and corrosion resistance were studied. The results showed that USRP treatment significantly improved the corrosion resistance, and the factors leading to this enhancement varied with different treatment passes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Hyung-Jun Cho, Kyung-Shik Kim, Han-Seop Noh, Sung-Joon Kim
Summary: The effect of cold rolling on hydrogen embrittlement in stable 18Cr-1Mn-11Ni-0.15N austenitic stainless steels was investigated in this study. It was found that the severity of hydrogen embrittlement increased with the degree of cold rolling, due to the generation of deformation twins and increased defect density during the process. The combination of cracks generated at the twin boundaries and promoted hydrogen diffusion led to severe hydrogen embrittlement in the cold-rolled steels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Li Fu, Hualong Ge, Boning Zhang, Xuan Zhou, Lihua Ma, Lixian Zhu, Shaoping Lu, Bin Yuan, Junjie He, Yong Mao
Summary: This study investigates the microstructural evolution and the effects of discontinuous precipitation (DP) and ordering on the age-hardening behavior in Au-20Ag-30Cu ternary alloy. Experimental observations reveal that DP forms at grain boundaries consisting of alternating α1 and α2 phases, while L12-type AuCu3 ordered phase with nanometric spherical particles forms at grain interior and within the lamellar α1 phase of DP. Both DP and L12-type AuCu3 nanoprecipitates show growth with elevated aging temperature. DP at grain boundaries is found to have a detrimental effect on overall age-hardening, while the L12-type AuCu3 nanoparticles effectively impede the movement of dislocations to enhance age-hardening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Industrial
Jiantao Zhang, Yuanzhi Zhu, Xiaoying Xi, Zhiyu Xiao
Summary: The ultrasonic surface rolling process (USRP) was applied to duplex stainless steel (DSS) and resulted in grain refinement, increased dislocation density, and high surface compressive residual stress. These factors synergistically contributed to the enrichment of Cr2O3 in the passive film and improved the corrosion resistance of the material.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Kaushal Kishore, R. Gaurav Kumar, Avanish Kumar Chandan
Summary: The study investigated the effect of strain rate on the micro-mechanism of plastic deformation and work hardening behavior of AISI 304 stainless steel. It found a crossover in the work hardening plot between slow and high strain rate specimens at around 5% strain, and examined substructure evolution using transmission electron microscope and electron back-scattered diffraction. Differences in the work hardening mechanisms were attributed to factors such as twinning, martensite formation, and cross-slip.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Hongxu Zhu, Peipei Ma, Chunhui Liu, Jun He, Jianshi Yang, Longhui Chen, Lanping Huang, Lihua Zhan
Summary: The effects of conventional T4 temper and cryogenic pre-deformation on the stress relaxation ageing behavior and mechanical/corrosion properties of alloys were investigated. Cryogenic pre-deformation significantly increased the stress relaxation rate and strength of the alloy, while reducing the elongation. Dislocation movement played a key role in the increase of stress relaxation rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Lu Zhang, Zhaohui Hu, Li Zhang, Hao Wang, Jianbo Li, Zhou Li, Jianxin Yu, Baolin Wu
Summary: In this study, multiple strengthening/deformation mechanisms were introduced into a Ni-rich medium-entropy alloy. The alloy exhibited superior mechanical properties, including gigapascal yield strength, excellent ductility, and strong work hardening ability. The increase in stacking faults, Lomer-Cottrell locks, and deformation twins were found to be the main reasons for the improvement in work hardening ability. The findings suggest that the coordination of multiple strength/toughening mechanisms can enhance the strength-ductility trade-off.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Milad Rostami, Reza Miresmaeili, Asghar Heydari Astaraee
Summary: In this study, the surface microstructural features and mechanical properties of metallic materials after surface mechanical impact treatment (SMIT) were investigated. A gradient nanostructured surface layer was formed on the treated samples, leading to enhanced mechanical performance.
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)