Article
Automation & Control Systems
Lin Han, Haoyu Zhang, Chuan Wang, Ge Zhou, Siqian Zhang, Lijia Chen
Summary: This study investigated the microstructure and dynamic recrystallization mechanism of Ti-6Mo-5 V-3Al-2Fe alloy through high temperature compression tests, EBSD and TEM analysis. The results showed that dynamic recrystallization was difficult to occur in the alpha + beta phase region due to the presence of alpha phase. However, when the deformation temperature was below beta-transus, a small amount of dynamic recrystallized beta grains were formed. Additionally, at temperatures above beta-transus, a large amount of dynamic recrystallized beta grains could be observed.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Crystallography
Lin Han, Haoyu Zhang, Jun Cheng, Ge Zhou, Chuan Wang, Lijia Chen
Summary: In this study, hot compression experiments were conducted on the Ti-6Mo-5V-3Al-2Fe alloy using the Gleeble-3800 thermal simulation machine. The results revealed the deformation behavior, dynamic recrystallization characteristics, and determined the optimal hot working parameters for the alloy.
Article
Materials Science, Multidisciplinary
Jingqi Zhang, Xinyu Xu, Jiayu Xue, Sinong Liu, Qinghua Deng, Feng Li, Jie Ding, Hui Wang, Hui Chang
Summary: The hot deformation behavior and microstructure evolution mechanism of TC19 titanium alloy were studied. The flow behavior of the alloy and its hot processing map were predicted using experimental and modeling analysis. It was found that the deformation mechanism was mainly controlled by the deformation rate, leading to different deformation mechanisms and grain structures at different deformation rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Crystallography
Haoyu Zhang, Jie Sun, Ge Zhou, Xiaoling Yu, Chuan Wang, Jian Gao
Summary: This study investigates the influence of phase composition on stress-corrosion cracking behavior in a novel metastable beta titanium alloy. It is found that an increased amount of beta phase improves stress-corrosion cracking resistance, while the presence of alpha phase has an adverse effect on stress corrosion performance.
Article
Materials Science, Multidisciplinary
Kezhao Zhang, Chaowei He, Dong Liu, Chunyan Yan, HongZhi Niu, Zhibin Yang, Yefeng Bao
Summary: This study investigates the influence of heat input during laser welding process on the microstructure and properties of beta titanium alloy joints. It was found that higher heat input exacerbates the coarsening of beta grains in the fusion zone and HAZ, resulting in decreased ultimate tensile strength of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
A. G. Illarionov, F. V. Vodolazskiy, N. A. Barannikova, Ya Kosmatskiy, Yu Khudorozhkova
Summary: The study found that the higher the degree of alloying, the lower the minimum value of the coefficient of thermal expansion, and it may be negative. This effect is associated with the redistribution of alloying elements between alpha and beta phases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Kezhao Zhang, Dong Liu, Jiameng Cai, Yanhua Zhou, Hongzhi Niu, Chunyan Yan, Yefeng Bao
Summary: The influence of laser offsets on the composition, microstructure, and tensile properties of laser welded Ti-3Al-6Mo-2Fe-2Zr and TA15 dissimilar joints was investigated. Numerical simulation was used to extensively discuss the microstructure evolution in the HAZ, revealing that different laser offsets led to variations in the microstructure of the fusion zone.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Abhishek Rastogi, Rajdeep Sarkar, Suresh Neelakantan
Summary: Martensitic transitions in Ti-1023 alloy as a function of cold rolling strain levels (5-43%) have been investigated. Different phases such as ω and α' have been confirmed from the β phase through XRD, TEM, and EBSD techniques. The presence of ω phase is confirmed in the 5% cold rolling sample, which acts as preferential nucleating sites for α' martensite formation. Additional deformation processes such as martensite compound twinning and strain-induced α'→α' martensitic transformation are also observed. With further increase in cold rolling strains to 43%, the transformation of β→α' and strain-induced α'→α' martensites are pronounced. The study suggests that Ti-1023 alloy exhibits high cold deformability up to -43%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yali Xu, Lingyu Xu, Liang Ding, Shuaifeng Zhang, Binbin Zhang, Hengpei Pan, Xiaoyang Lu, Peng Jiang
Summary: The microstructure and microtexture evolution of a near-alpha titanium alloy Ti-6321 during the post-annealing process were investigated. The results showed that the recrystallization, alpha grain globularization, coarsening, and phase transformation occurred, resulting in changes in macrozone sizes, morphologies, and texture components.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Xinkai Ma, Zhuo Chen, Lei Xiao, Shifeng Luo, Wenjie Lu
Summary: In this study, the compressive deformation behavior of a beta solution treated Ti-1023 alloy was analyzed at room temperature. The results revealed that stress-induced martensitic transformation dominated the compressive deformation process, with different strain rates leading to varying work hardening rates and triggering stresses. Additionally, novel deformation mechanisms of alpha '' martensite, such as {111}(α'') twinning and kinking structure, were observed during the compression deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Kathleen Chou, Nan Li, Emmanuelle A. Marquis
Summary: Oxygen partitioning to omega phase during aging improves compressive yield strength and work hardening behavior of titanium alloys containing oxygen-stabilized omega precipitates. Oxygen may offer design strategies to address embrittlement and loss of ductility in omega-strengthened beta Ti alloys.
Article
Chemistry, Physical
Alessandro Carrozza, Alberta Aversa, Paolo Fino, Mariangela Lombardi
Summary: This study investigated the most suitable process window for the titanium alloy Ti-6Al-2Sn-4Zr-6Mo using LPBF technology. The effects of different process parameters on the microstructure, phases, and mechanical properties of the material were thoroughly studied, showing superior strength of the alloy suitable for aerospace industry applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Manufacturing
S. A. Mantri, M. S. K. K. Y. Nartu, S. Dasari, A. Sharma, P. Agrawal, R. Salloom, F. Sun, E. Ivanov, K. Cho, B. McWilliams, S. G. Srinivasan, N. B. Dahotre, F. Prima, R. Banerjee
Summary: The study found that the LPBF processed Ti-10V-2Fe-3Al alloy lacked ductility and strain hardenability due to the formation of isothermal omega precipitates during fabrication, but after a beta-solution heat treatment, the TRIP/TWIP effects were reactivated, leading to substantial recovery of tensile ductility and very high strain hardening rate. This high strain hardening rate is believed to be a result of rapid strain-induced transformation from beta to alpha during plastic deformation, coupled with hierarchical twinning within the martensite plates.
ADDITIVE MANUFACTURING
(2021)
Article
Nanoscience & Nanotechnology
Kathleen Chou, Owen Neill, Emmanuelle A. Marquis
Summary: Increasing oxygen levels can induce refinement of alpha phase during ageing, combined with omega-assisted alpha nucleation resulting in significantly reduced alpha sizes, leading to increased compressive yield strengths in beta titanium alloys.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Zhang Haoyu, Wang Chuan, Liu Dan, Cheng Jun, Zhou Ge, Chen Lijia
Summary: The size, morphology, and distribution of the secondary alpha phase in a novel near α titanium alloy were studied, with effects on alloy strength and ductility analyzed. Results showed that the spacing of the alpha(i) phase determined alloy strength, while alloy ductility was influenced by both intragranular alpha phase and grain boundaries alpha phase. Proper aging conditions can lead to improved alloy strength and ductility.
RARE METAL MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Amir Momeni, Seyed Mehdi Abbasi, Maryam Morakabati, Hasan Badri
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2017)
Article
Materials Science, Multidisciplinary
G. R. Ebrahimi, A. Momeni, Sh. Kazemi, H. Alinejad
Article
Materials Science, Multidisciplinary
N. Bayat, G. R. Ebrahimi, A. Momeni, H. R. Ezatpour
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
M. Mohammadpour, A. Momeni, H. R. Jafarian, H. Alinejad
Article
Nanoscience & Nanotechnology
G. R. Ebrahimi, A. Momeni, H. R. Ezatpour
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Nanoscience & Nanotechnology
S. Zangeneh Najafi, A. Momeni, H. R. Jafarian
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Materials Science, Multidisciplinary
Amir Momeni, Gholamreza Ebrahimi, Hamidreza Ezatpour
PHILOSOPHICAL MAGAZINE
(2018)
Article
Metallurgy & Metallurgical Engineering
Hamid Reza Ezatpour, Marziyeh Torabi-Parizi, Gholam Reza Ebrahimi, Amir Momeni
STEEL RESEARCH INTERNATIONAL
(2018)
Article
Materials Science, Multidisciplinary
Saeed Ahmadifard, Amir Momeni, Simin Bahmanzadeh, Shahab Kazemi
Article
Materials Science, Multidisciplinary
S. Ahmadifard, Sh. Kazemi, A. Momeni
Article
Chemistry, Physical
Mandi Samii Zafarghandi, Seyed Mandi Abbasi, Amir Momeni
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Nanoscience & Nanotechnology
G. R. Ebrahimi, A. Momeni, H. R. Ezatpour, M. Jahazi, P. Bocher
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
A. Momeni, S. M. Abbasi, S. Sadeghpour
Article
Chemistry, Physical
F. Mahheidary, B. Tolaminejad, A. Momeni
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Metallurgy & Metallurgical Engineering
S. M. Abbasi, A. Momeni, M. Daraee, A. Akhondzadeh, G. Mirsaeed
ARCHIVES OF METALLURGY AND MATERIALS
(2017)
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)