Patent ID: 9696142
Date: 2017-07-04
CPC Classifications: B22F,B23K,B28B,B29C,B29L,B33Y,G01B,G01L,Y02P

Claim:
1. A method for determining residual stresses of a component while being manufactured by an additive manufacturing process, the method comprising the steps of: creating at least one local melt pool via laser energy in a surface of the component being manufactured after a predetermined portion of the component is completed; optically detecting surface distortions or elongations occurring at least in a region around the created melt pool, wherein the optical detection of the surface distortions or elongations is carried out using an optical distortion-based method, the optical distortion-based method being a speckle interferometry method; and determining residual stresses of the component present at least in the region around the created melt pool based on the optically detected surface distortions or elongations.