Article
Materials Science, Multidisciplinary
Shuaizhuo Wang, Zhaohua Hu, Wang Zeng, Jiaxi Huang, Lirong Xiao, Hao Zhou
Summary: The study found that rotational hot rolling can increase the uniform elongation of alloys without significantly reducing their strength, possibly achieved through texture tuning.
Article
Materials Science, Multidisciplinary
Jishi Zhang, Haijun Liu, Jie Zheng, Jinsheng Ji, Yusha Shi, Leichen Jia, Zhaoming Yan, Beibei Dong, Yong Xue
Summary: The study found that the strain rate affects the fraction and diameter of dynamically recrystallized grains, and different mechanisms under different temperatures lead to different microstructural evolutions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Manufacturing
S. Spigarelli, C. Paoletti, M. Cabibbo, E. Cerri, E. Santecchia
Summary: This study investigates the creep response of a Ti-6Al-4V alloy produced by additive manufacturing at different temperatures. An analysis of data from literature on Ti-6Al-4V produced by conventional technologies and heat treated to form different microstructures was conducted to understand the effect of microstructure on creep behavior. The findings suggest that microstructure plays a role in determining ultimate tensile strength, but its influence diminishes at higher temperatures and lower stresses. A constitutive model developed for fcc metals successfully describes the creep response across different microstructures.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Guoqing Dai, Jingzhe Niu, Yanhua Guo, Zhonggang Sun, Zhenhua Dan, Hui Chang, Lian Zhou
Summary: The addition of Fe in the Ti-6Al-4V-xFe alloys was found to promote grain refinement and improve the hot workability of the material during hot deformation. This was attributed to the decrease in peak stress, increase in high angle grain boundary fraction, and the facilitation of dislocation annihilation by Fe addition.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Ni Ao, Daoxin Liu, Xiaohua Zhang, Jiwang Zhang, Shengchuan Wu
Summary: This study investigates the effect of initial surface plastic deformation on the fatigue behavior of Ti-6Al-4V alloy. The results show that samples with low plastic deformation severity have higher fatigue strength and accommodate plastic strain by refining the grains.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Haijun Liu, Zhimin Zhang, Kaihua Xu, Jishi Zhang, Yong Xue, Qiang Wang
Summary: The study on a hot isostatic pressed Ti-6Al-4V alloy during multi-pass deformation at variable temperature parameters revealed the microstructural and microhardness evolution, showing significant changes in the deformation mechanisms and phase transformations of the alloy. The results also demonstrated the variations in lamellar alpha phase characteristics, such as rotation, length, thickness, and spheroidization, with an increase in strain rates. Additionally, the contribution of calphal in the integrated hardness during multi-pass deformation was found to be greater at higher deformation temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
S. Spigarelli, C. Paoletti, E. Cerri, E. Santecchia, M. Cabibbo
Summary: The present study investigates the creep response of a Ti-6Al-4V alloy produced by additive manufacturing and annealed above the 8-transus. The study aims to explain the observed differences in behavior compared to the same alloy annealed at lower temperatures. The results show that even minor differences in heat treatment conditions can cause significant variations in the creep threshold stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Asit Kumar Gain, Liangchi Zhang, Sean Lim
Summary: This study investigated the wear behavior, subsurface damage mechanism, and deformation process of bioinert Ti-6Al-4V alloy under different applied loads. The results showed that increasing the load could accelerate the wear rate and lead to severe microcracks and plastic deformation on the worn surface. Additionally, recrystallization phenomena occurred in the worn subsurface, resulting in reduced grain size and increased nanohardness and elastic properties.
Article
Materials Science, Multidisciplinary
Qiangqiang Zhu, Xingdi Yang, Huifang Lan, Dongxiao Wang, Hongtao Lou, Jianping Li
Summary: The effects of solution treatments on the microstructure and mechanical properties of hot rolled Ti-6Al-4V alloy sheet were studied. The solution treatment resulted in a-> p-> pt transformation, with the a phase changing from long strip to equiaxed morphology and an increase in the fraction of equiaxed a and p phases. Bimodal microstructure of ap and pt was obtained during the solution treatments, with pt consisting of high-density nano-needles of different orientations contributing significantly to the alloy's strength. The best strength-ductility matching was achieved at 930°C for 60min or 960°C for 30min, with almost equal volume fractions of ap and pt and a PSE exceeding 14500 MPa,%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Adarsh Kumar, Nilesh Kumar, Mithlesh Kumar Mahto, Surya D. Yadav, Meghanshu Vashista, Mohd Zaheer Khan Yusufzai
Summary: The welding process of Ti-6Al-4V alloy was studied, and a shielding set-up was used to produce coarse β-phase grains and Widmanstaetten morphology in the heat affected zone and weld zone, which improved the resistance to grain boundary sliding and dislocation glide, resulting in enhanced creep resistance in these regions.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Qiang-qiang Zhu, Hui-fang Lan, Bao-sen Lin, Dong-xiao Wang, Su Huang, Yu-yong Chen, Xing-di Yang, Jian-ping Li
Summary: In this research, a Ti-6Al-4 V alloy thin strip with ultra-high tensile strength and good ductility combination was successfully prepared by a new high-efficiency short-flow on-line warm rolling processing method. The study investigated the relationship between microstructure evolution, mechanical characteristics and deformation mechanism during on-line warm rolling of the alloy. The results showed that the alloy's strength and ductility increased with the rolling reduction, achieving high strength and commendable ductility through material adaptations and a combination of slip systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Manufacturing
Karthik Palaniappan, M. Sundararaman, H. Murthy, R. Jeyaraam, Balkrishna C. Rao
Summary: This work investigates the influence of texture on chip formation during machining of Ti-6Al-4V alloy. Different textures were produced using cold-rolling, and the morphology of chips varied between cold-worked and annealed samples due to the developed texture. The developed texture affects the strain necessary for fracture initiation in the primary shear zone, thus affecting the spatial frequency of segmentation.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2022)
Article
Materials Science, Multidisciplinary
Jiashu Wei, Fang Yang, Miao Qi, Yanli Sui, Cunguang Chen, Zhimeng Guo
Summary: This study investigates the propagation of cracks based on microstructure and finds that voids coalescence in adiabatic shear band is the initiation of dominant cracks, while micro cracks and voids on prior-alpha/beta trans interfaces aggravate the crack propagation.
Article
Engineering, Mechanical
Ni Ao, Daoxin Liu, Xiaohua Zhang, Shengchuan Wu
Summary: Surface plastic deformation methods are widely used to improve the fretting fatigue property of titanium alloys. In this study, the influence of surface plastic deformation severity on the fretting fatigue behavior of Ti-6Al-4V alloy was investigated. The experimental results showed that both high and low levels of surface plastic deformation severity improved the fretting fatigue properties of the alloy, but their effects on microstructure and residual stresses were different.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Metallurgy & Metallurgical Engineering
Yi Xiao, Li-hui Lang, Wen-cai Xu, De-xin Zhang
Summary: High-quality Ti-6Al-4V powder-solid parts were successfully fabricated using the hot isostatic pressing (HIP) process, which possessed good interfacial strength and mechanical properties.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
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)