Mechanical and Fracture Properties for As-Built 3DMD Inconel 718: Stability to Process Parameters Variation

Abstract

A complete parametric study of the influence of laser power and scanning velocity on microstructure and properties of as-built 3DMD Inconel 718 was performed. All deposits exhibited only minor microstructure variations as observed by EBSD. Consequently, it was shown that in terms of hardness, stress-strain, and fracture properties, the deposition method is very robust as the results typically differed by less than 10% even when comparing the two farthest melt pool heat input deposition conditions. It is suggested here that the robustness of the method at the used conditions can be attributed to the control of the melt pool temperature by increasing the melt pool size.