1st International Workshop on Materials Science and Mechanical Engineering | |
Effect of α-Platelet Thickness on the Mechanical Properties of Ti-6Al-4V Alloy with Lamellar Microstructure | |
材料科学;机械制造 | |
Ren, Y.^1 ; Zhou, S.M.^2 ; Xue, Z.Y.^1 ; Luo, W.B.^3 ; Ren, Y.J.^1 ; Zhang, Y.J.^1 | |
School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing | |
102206, China^1 | |
No. 52 Institute of China Ordnance Industries, Yantai, Shandong | |
264003, China^2 | |
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing | |
100083, China^3 | |
关键词: Beta transus; Fracture strain; Hall Petch relationship; Lamellar microstructure; Plate thickness; Quasi-static; Temperature conditions; Ti-6Al-4V alloy; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/281/1/012024/pdf DOI : 10.1088/1757-899X/281/1/012024 |
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学科分类:材料科学(综合) | |
来源: IOP | |
【 摘 要 】
In this paper, lamellar microstructures with average α-platelet thicknesses ranging from 0.55 μm to 1.98 μm were obtained in Ti-6Al-4V (Ti64) alloy by solution-treated above β-transus temperature and followed cooling through different methods. Then effects of the average thickness of plate-like α phase on the mechanical properties of this alloy were investigated. The results show that the yield stress and/or the flow stress of Ti64 decrease with increased average α-platelet thickness during compression under various strain-rate and temperature conditions. Conversely, the ductility increases with increased average α-platelet thickness. The greater plate thickness facilitates slip and avoids severe pile-up of dislocations in α phase, resulting in the augmentation of the fracture strain as well as decrease of the strength of Ti64. Finally, the variation of yield stress with average α-platelet thickness satisfies Hall-Petch relationship at both quasi-static and dynamic loading strain-rates.
【 预 览 】
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Effect of α-Platelet Thickness on the Mechanical Properties of Ti-6Al-4V Alloy with Lamellar Microstructure | 1979KB | download |