Article
Chemistry, Physical
Yuhui Wei, Liwei Lu, Minhao Li, Min Ma, Weiying Huang, Xi Zhao, Ruizhi Wu
Summary: A novel method of severe plastic deformation (SPD) called forging-bending repeated deformation process was proposed to prepare AZ31 magnesium alloy sheets. The effects of this new process on various parameters were investigated, and it was found that the refined grain size, dynamic recrystallization mechanism, and hardness distribution were significantly influenced. The results also showed that the new process improved the uniformity and plasticity of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Mechanical
Zhenwei Wang, Jianping Wang, Changwen Huang, Jiabing Song, Baoguo Xu, Xingquan Zhang
Summary: This study uses optical observation, fracture morphology analysis, microhardness testing, and finite element analysis to determine that the uneven distribution of carbides in the die material, high temperature oxidation and coarse grain, and stress concentration caused by fatigue loading are the reasons for the premature failure of the steel piston forging die.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Nanoscience & Nanotechnology
H. Miura, P. L. Khoo, M. Kobayashi
Summary: This study utilized extremely high-pressure forging conditions to refine the grain and improve the mechanical properties of magnesium AZ80 alloy by forming mechanical twins and texture strengthening. The hardness, yield strength, and ultimate tensile strength of the material were notably enhanced with increasing forging stress.
SCRIPTA MATERIALIA
(2023)
Article
Automation & Control Systems
Yue Meng, Lifeng Ma, Weitao Jia, Hongbo Xie, Liwei Lu
Summary: This paper proposes a numerical simulation method to study the influence of process parameters on stress distribution in ultrasonic shearing of hard-to-deform magnesium alloy sheets. The results showed that the sheet temperature had the greatest influence on the stress distribution in the AZ31B magnesium alloy sheet. Ultrasonic shearing significantly reduced the equivalent stress on the sheet and improved the sheet section quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jing Yin, Rufu Hu, Xuedao Shu
Summary: This study analyzed the closed-die forging process of the copper alloy valve body, comparing the processes on a conventional double-action press and a multicored forging press. It was found that the multicored forging press had significantly better technological safety and product quality than the conventional press, with experimental results confirming the findings of finite element simulations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Tharindu Kodippili, Stephan Lambert, Arash Arami
Summary: This study proposes a computational design framework using artificial neural networks (ANNs) to generate and predict the forging response of preform shapes. A parametric CAD model is developed to generate preforms, and a set of 3D models is generated for offline finite element method (FEM) simulations. By processing forging simulation data, a dataset is created to train feedforward ANNs to predict average effective plastic strain response. The framework is applied to a closed-die cast-forging operation of a Magnesium (Mg) alloy I-beam, and the predicted results are within +/- 8% of the ground truth.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Biomedical
Yafei Li, Yan Wang, Zhenquan Shen, Fulong Miao, Jianfeng Wang, Yufeng Sun, Shijie Zhu, Yufeng Zheng, Shaokang Guan
Summary: In this study, a new structurally designed magnesium alloy stent was proposed and optimized to improve its plastic deformation, expansion, and compression resistance performance. Experimental results verified the simulation results, demonstrating that the optimized stent has higher radial strength and reduced stress concentration compared to the traditional sinusoidal stent.
ACTA BIOMATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
J. X. Wei, H. Yan, R. S. Chen
Summary: This study investigates the mechanical properties and fracture mechanisms of cast Mg-6Gd-3Y-0.4Zr (GW63) alloy with geometrical discontinuities induced by notches. It is found that cleavage micro-cracking behavior dominates notch fracture, which is rare for conventional Mg alloys. The accumulation and coalescence of cleavage microcracks initiate failure near the notch.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Yuxiu Zhang, Dongliang Chen, Hiromi Nagaumi, Xuyue Yang
Summary: In this study, conventional forging was used to significantly improve the creep resistance of a Mg-0.9Mn-0.5Ce alloy, resulting in a mixed microstructure with both coarse and fine grains. The improved creep resistance was mainly attributed to the introduction of strong dislocation entanglements, tough twin boundaries, and precipitates, as well as the decreased mobility of dislocations and grain boundaries due to dynamically precipitated Mg12Ce precipitates and Ce element segregation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Yu-Ying He, Sheng-Wen Bai, Gang Fang
Summary: In this study, the dynamic recrystallization (DRX) behavior of a Mg-Al-Zn-RE alloy with abundant second-phase particles during hot extrusion is investigated using a combination of finite element (FE) and cellular automaton (CA) models. The results show that the extrusion conditions have a significant influence on the microstructural evolution of the magnesium alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Engineering, Mechanical
Xiaoqing Shang, Haiming Zhang, Leyun Wang, Gaoming Zhu, Zhenshan Cui, M. W. Fu, Xiaoqin Zeng
Summary: The ductility of magnesium alloys is greatly affected by damage formation and accumulation. A comprehensive study was conducted to uncover the underlying damage mechanism of a Mg-0.5%wtCa alloy, revealing that the central hole tension has a greater resistance to damage than uniaxial tension. The results suggest that in addition to the stress state, the strain partition mode also plays a vital role in the fracture behavior of dilute MgCa alloy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Construction & Building Technology
Yusuf Akinbade, Kent A. Harries
Summary: Bamboo is described as a functionally graded unidirectional fibre-reinforced composite material, but the dominant failure mode of longitudinal splitting is affected by transverse material properties, suggesting that the often-adopted RoM method may not adequately capture the transverse behavior of bamboo as a material. Additional approaches are needed to better understand and study the reasons for this deviation in behavior.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Ru-long Ma, Chao-qun Peng, Zhi-yong Cai, Ri-chu Wang, Zhao-hui Zhou, Xiao-geng Li, Xuan-yang Cao
Summary: The research examined the effects of laser power, point distance, and hatch spacing on the temperature distribution, molten pool size, residual stress, as well as the microstructure, density, and hardness of Al-Mg-Sc-Zr alloy during the selective laser melting process.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Engineering, Manufacturing
Zhijie Zhou, Shupeng Cai, Yuanqing Chi, Lintao Wei, Yongkang Zhang
Summary: A new technique called Weld-LSF has been proposed for low-stress manufacturing of T-joints through in-situ synchronous assisted arc welding using laser shock forging. This innovative process reduces tensile residual stresses associated with welding by introducing plastic deformation in the deposited weld seam at elevated temperatures. Experimental investigations have shown that the in-situ LSF treatment can significantly reduce tensile residual stresses and improve the mechanical properties of the specimens.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Chemistry, Physical
Mohanraj Murugesan, Jae-Hyeong Yu, Wanjin Chung, Chang-Whan Lee
Summary: The workability and flow stress of AZ31B magnesium alloy were investigated through uniaxial warm tensile experiments at various deformation temperatures (50-250 degrees C) and strain rates (0.005 to 0.0167 s(-1)). Three models, namely BP-ANN, GABP-ANN, and CFBP-ANN, were explored for predicting flow stress. Machine learning models were trained using process parameters as inputs and flow stress as the output, with normalized experimental flow stress values to enhance network performance. Statistical analysis revealed that both GABP-ANN and CFBP-ANN models exhibited better accuracy in predicting flow stress, with the CFBP-ANN model showing higher predictability compared to GABP-ANN. This confirms the potential of the proposed CFBP-ANN model for accurately describing the deformation behavior of AZ31 magnesium alloy and its applicability in finite element analysis.
Article
Materials Science, Multidisciplinary
Taekyung Lee, Michiaki Yamasaki, Yoshihito Kawamura, Yongmoon Lee, Chong Soo Lee
Article
Materials Science, Multidisciplinary
Koji Hagihara, Zixuan Li, Michiaki Yamasaki, Yoshihito Kawamura, Takayoshi Nakano
Article
Materials Science, Multidisciplinary
Shin-ichi Inoue, Michiaki Yamasaki, Yoshihito Kawamura
Article
Chemistry, Physical
Moustafa El-Tahawy, Kristian Mathis, Gerardo Garces, Tsubasa Matsumoto, Michiaki Yamasaki, Yoshihito Kawamura, Jeno Gubicza
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Metallurgy & Metallurgical Engineering
Ling Li, Ryo Matsumoto, Hiroshi Utsunomiya
ISIJ INTERNATIONAL
(2019)
Article
Materials Science, Multidisciplinary
Masafumi Matsushita, Takafumi Nagata, Jozef Bednarcik, Norimasa Nishiyama, Shoya Kawano, Satoshi Iikubo, Yuji Kubota, Ryo Morishita, Tetsuo Irifune, Michiaki Yamasaki, Yoshihito Kawamura, Masanori Enoki, Hiroshi Ohtani
MATERIALS TRANSACTIONS
(2019)
Article
Engineering, Industrial
Hiroshi Utsunomiya, Shugo Kameyama, Ryo Matsumoto
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2019)
Article
Nanoscience & Nanotechnology
Koji Hagihara, Michiaki Yamasaki, Yoshihito Kawamura, Takayoshi Nakano
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Nanoscience & Nanotechnology
Kazuha Suzawa, Shin-ichi Inoue, Soya Nishimoto, Seigo Fuchigami, Michiaki Yamasaki, Yoshihito Kawamura, Katsuhito Yoshida, Nozomu Kawabe
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Industrial
Hiroshi Utsunomiya, Ryo Aizawa, Tomoya Fujimoto, Ryo Matsumoto
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2020)
Article
Engineering, Industrial
Ryo Matsumoto, Harutaka Sakaguchi, Masaaki Otsu, Hiroshi Utsunomiya
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Article
Engineering, Manufacturing
Hatsumi Ohnishi, Kazuki Takamoto, Hiroaki Matsumoto, Ryo Matsumoto
JOURNAL OF MANUFACTURING PROCESSES
(2020)
Article
Engineering, Industrial
Ryo Matsumoto, Sotaro Tanaka, Hiroshi Utsunomiya
Summary: The study observed that the superposition of torsional shear stress in upsetting and lateral extrusion can assist the lateral metal flow and reduce the barreling deformation of the workpiece. Enhanced plastic flow in upsetting can be applied to fill tooth cavities in lateral extrusion processes.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Industrial
Hiroshi Utsunomiya II, Yoshimitsu Terada, Koji Ono, Ryo Matsumoto
Summary: A novel method for in situ observation of the rolling interface is proposed in this study, where one roll is fixed while the other roll revolves around it, allowing the observation of the solder rolling interface.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
T. Kitashima, R. Matsumoto, Y. Yoshida, H. Matsumoto, T. Nishihara, S. Kuroda, N. Motohashi, M. Hagiwara, S. Emura
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2019)
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)