|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A-27: Effect of Build Geometry on the Microstructure and Tensile Properties of 17-4 PH Stainless Steel Parts Prepared by Selective Laser Melting
||Yu Sun, Mark Aindow, Rainer Hebert
|On-Site Speaker (Planned)
Metal additive manufacturing (AM) is a promising approach for fabricating geometrically complex parts that are difficult to produce by traditional manufacturing and assembly techniques. However, the repetitive rapid melting and solidification during metal AM processing leads to high residual stresses and microstructural heterogeneities, which pose significant barriers to obtaining the desired final geometry and mechanical properties in AM parts. In this context, it is important to understand the effect of the build geometry on the microstructural development during AM processing. In this study, we used selective laser melting to produce 17-4PH stainless steel test specimens with different thicknesses, thickness ratios at transitions in cross-section, and inclinations of the specimen axes to the build direction. These specimens were examined using electron microscopy to evaluate variations in the microstructure, defects, texture, and phase constituents. The effects of these parameters on the mechanical properties were evaluated using tensile data from the test specimens.
||Planned: Supplemental Proceedings volume