Residual stress via the contour method in compact tension specimens produced via selective laser melting

28 Jun 2016

The complex thermal history of parts produced via selective laser melting (SLM) leads to a complex residual stress state. While it is generally accepted that these residual stresses are unfavorable, their exact influence on the mechanical behavior of parts produced by SLM is unknown. Two-dimensional stress mapping using the contour method shows that residual stresses have a major influence on the anisotropic behavior of Ti6Al4V produced via SLM. Furthermore, maximum stress values are close to the yield stress.