Monday  |  Lakeshore C  |  10:40 AM–11:00 AM

#19793, Influences on Residual Stress in Components Produced Through Metal Powder-Based Additive Manufacturing

While additive manufacturing (AM) processes enable fabrication of highly complex metallic geometries, the development of significant residual stresses related to the layered deposition procedure can produce out-of-tolerance features, dramatically undercut part lifetimes, or even result in AM build failure. This work presents a summary of mechanical experimental measurements of residual stress for directed energy deposition cases. Beyond typical considerations of laser power and speed, significant influences on residual stress development related to build plate stiffness and deposition routine are quantified for IN625 and other alloys. In-situ measurements of component deformation during the build process are paired with monitored strain development in the build plate and post-build residual stress profiles.

Justin Gillham   University of Louisville
Thomas Berfield   University of Louisville