Dynamic mechanical properties and constitutive relationship of selective laser melted Ti-6Al-4V alloy

被引：0

作者：

Zhu L. ^{[1
,2
]}

Liu Y. ^{[1
,2
,3
]}

Meng J. ^{[1
,2
]}

Li Z. ^{[3
]}

Hu J. ^{[3
]}

Li G. ^{[2
]}

Wang Y. ^{[1
,2
]}

机构：

[1] Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Zhejiang, Ningbo

[2] Faculty of Mechanical Engineering and Mechanics, Ningbo University, Zhejiang, Ningbo

[3] National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Sichuan, Mianyang

来源：

Baozha Yu Chongji/Explosion and Shock Waves | 2022年 / 42卷 / 09期

关键词：

dynamic mechanical properties; finite element simulation; Johnson-Cook constitutive model; selective laser melting; Ti-6Al-4V alloy;

D O I：

10.11883/bzycj-2021-0227

中图分类号：

学科分类号：

摘要：

Aiming at understanding the dynamic mechanical properties of titanium alloys additively manufactured by selective laser melting (SLM), quasi-static and dynamic impact experiments were carried out on selective laser melted Ti-6Al-4V alloy at different temperatures using thermal simulation material testing machine and SHPB device, respectively. Based on the experimental results, the parameters of Johnson-Cook constitutive model are fitted. Meanwhile, the mechanical behaviors of titanium alloy at high temperature and high strain rates were simulated by finite element method. The results show that the yield strength of selective laser melted Ti-6Al-4V alloy is enhanced significantly compared with those of wrought or forged counterparts, Moreover, it exhibits significant strain rate strengthening effect and thermal softening effect. The finite element simulation results are close to the experimental results and further validate the constitutive model parameters, which could provide a theoretical basis for expanding the application of selective laser melting technique and its products. © 2022 Explosion and Shock Waves. All rights reserved.

引用

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