Residual Strain Analysis of Additively Manufactured Structural Materials

This paper presents an investigation of residual strains in additively manufactured Haynes 282 samples. Nine samples were fabricated, each one with a different combination of layer thickness, layer orientation and laser power to better understand the sensitivity of the residual strains to the printing parameters. The residual strains were measured at Oak Ridge National Labs (ORNL) HB-2B beam line using Neutron Diffraction (ND) techniques. Preliminary results show that the largest residual strains were observed along the build direction (Z-axis), and that layer orientation did not have a significant effect on the magnitude of transverse and longitudinal strains. In addition to providing insight into the sensitivity of residual strains to different input parameters, the results of this study will also help to calibrate residual strain analytical model predictions.