| Abstract Scope |
Residual stresses (RSs) are inevitable in additive manufacturing (AM), which causes part distortion and dimensional changes to original designs, affecting mechanical properties. RS and strain values may vary in magnitude, direction, and distribution throughout a built sample due to the thermal gradient nature of AM processes. When changes in lattice spacing are measured, elastic strain and rotation can be calculated to determine RSs. High resolution EBSD (HR-EBSD) measures lattice strains of up to 10-4 and rotation with a higher angular resolution within individual grains than conventional EBSD. Build-up of elastic and plastic strain, and dislocation densities can be considered based on lattice rotation curvature. In this work, commercially pure titanium additive samples are created, varying scanning patterns and speeds. RSs, microstructure, and texture are investigated utilizing HR-EBSD. Employment of this technique for measurements of RSs is not widely recognized, which is one reason for the interest in this work. |