Influence of porosity on the fatigue life of laser powder bed fusion–produced Ti6Al4V

被引：4
|
作者：
Becker T.H. [1 ]
Dhansay N.M. [1 ]
机构：
[1] Materials Engineering group, Department of Mechanical and Mechatronic Engineering, Stellenbosch University
来源：
Material Design and Processing Communications | 2021年 / 3卷 / 01期
关键词：
additive manufacturing; fatigue life; microstructure; porosity; selective laser melting; Ti6Al4V;
D O I：
10.1002/mdp2.141
中图分类号：
学科分类号：
摘要：
This work explores the fatigue life implications of porosity, microstructure, and the presence of residual stresses of laser powder bed fusion (LPBF)–produced Ti6Al4V. In particular, this study considers stress vs cycles to failure and its link to porosity levels, the underlying microstructure, and the presence of residual stresses. It is shown that both porosity and microstructure play the significant role that adversely affect fatigue life. However, neither play a leading role, and the combination of the two that govern the fatigue life performance of LPBF-produced Ti6Al4V. Residual stresses are shown to have a lesser influence. © 2020 John Wiley & Sons, Ltd.
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