宁大王永刚教授丨基于晶体塑性有限元的选区激光熔化Ti-6Al-4V的力学各向异性
论文研究背景及意义
Yang Liu, Feng Yu, Yonggang Wang. Mechanical Anisotropy of Selective Laser Melted Ti-6Al-4V Using a Reduced-order Crystal Plasticity Finite Element Model. Chinese Journal of Mechanical Engineering: Additive Manufacturing Frontiers, 2023, 2(1): 100062.
论文亮点
Figure 1 Comparison of the compressive stress–strain curve of SLMed Ti-6Al-4V between the X- and Y-directions
Figure 2 Comparison of the contours of von Mises stress (Pa) for samples subjected to compression in the (a) scanning direction and (b) building direction of SLMed Ti-6Al-4V
试验方法
4. 通过组合不同晶体取向和晶粒数目的RVE晶体塑性有限元模型，探究产生各向异性的根源。
研究结果
微观结构形态对选区激光熔化Ti-6Al-4V力学各向异性的影响
研究结论
3. 通过调控工艺参数，获得较多的弱织构组织，有利于降低材料的各向异性。
前景与应用
通过晶体塑性有限元方法揭示了材料各向异性的根源，并提出了一种通过将正各向异性和负各向异性的织构相互搭配，实现材料各向异性的调控的理论方法。
近年团队发表文章
[1] Yang Liu*, Jinhui Meng, Lei Zhu, Hongyu Chen, Zhiguo Li, Shuxin Li, Di Wang*, Yonggang Wang*, Konrad Kosiba. Dynamic compressive properties and underlying failure mechanisms of selective laser melted Ti-6Al-4V alloy under high temperature and strain rate conditions[J]. Additive Manufacturing, 2022, 54: 102772.
[2] Hongyu Chen, Yang Liu*, Yonggang Wang, Zhiguo Li, Di Wang, Konrad Kosiba. Dynamic compressive properties and failure mechanism of selective laser melted CoCrFeNiMn high entropy alloy[J]. Materials & Design, 2022, 224: 111324.
[3] Yang Liu*, Huaizhong Xu, Lei Zhu, Xiaofeng Wang, Quanquan Han, Shuxin Li, Yonggang Wang*, Rossitza Setchi, Di Wang*. Investigation into the microstructure and dynamic compressive properties of selective laser melted Ti-6Al-4V alloy with solution and aging treatments[J]. Materials Science & Engineering A, 2021, 805: 140561.
[4] Yang Liu*, Zhicong Pang, Ming Li, Yonggang Wang, Di Wang, Changhui Song, Shuxin Li*. Investigation into the dynamic mechanical properties of selective laser melted Ti-6Al-4V alloy at high strain rate tensile loading[J]. Materials Science and Engineering A, 2019, 745: 440-449.
[5] Xiaofeng Wang, Yang Liu*, Tongya Shi, Yonggang Wang*. Strain rate dependence of mechanical property in a selective laser melted 17-4 PH stainless steel with different states[J]. Materials Science & Engineering A, 2020, 792: 139776.
[6] Yang Liu*, Huaizhong Xu, Binyi Peng, Xiaofeng Wang, Shuxin Li, Qun Wang, Zhiguo Li, Yonggang Wang*. Effect of heating treatment on the microstructural evolution and dynamic tensile properties of Ti-6Al-4V alloy produced by selective laser melting[J]. Journal of Manufacturing Processes, 2022, 74: 244-255.
[7] 朱磊, 刘洋*, 孟锦晖, 李治国, 胡建波, 李国平, 王永刚. 激光选区熔化Ti-6Al-4V合金的动态力学性能及其本构关系[J]. 爆炸与冲击, 2022, 42(9): 091405.
[8] 彭斌意, 刘洋*, 郑晓董, 李国平, 李治国, 王永刚. 激光选区熔化颗粒增强钛基复合材料的动态抗压性能[J]. 材料工程, 2022, 50(06): 36-48.
论文原文:
https://doi.org/10.1016/j.cjmeam.2023.100062
