|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||Effect of skin microstructure on the bending properties of additively manufactured IN625 beams
||Arunima Banerjee, Sara Messina, William Musinski, Paul Shade, Marie Cox, Matthew Begley, Kevin Hemker
|On-Site Speaker (Planned)
Additively manufactured (AM) metallic structures often have location-dependent microstructures that depend on the laser raster pattern and thermal history. This can lead to spatial variations in the attendant mechanical properties. This study was undertaken to determine the location-specific material properties of IN625 beams fabricated via laser powder bed fusion approach. Samples either retained their as-printed microstructure consisting of smaller grains in the outer skin and larger grains in the interior region or were polished to remove the outer skin. Micro-bending tests were performed on both sets of samples to compute the contribution of the outer skin to the measured properties. The samples with the outer skin had a higher bending strength and hardening rate. These observations provide insight into the material properties and modeling approaches that need to be employed to capture the spread of plasticity in complex, printed thin-walled structures with similar microstructural variations.
||Additive Manufacturing, High-Temperature Materials, Mechanical Properties