|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Spatial Heterogeneity of Microstructure and Mechanical Properties in Inconel 718 Fabricated by Selective Laser Melting
||Sharniece Holland, Lin Li
|On-Site Speaker (Planned)
Inconel 718 fabricated by selective laser melting (SLM) is used to investigate the spatial heterogeneity of microstructure and mechanical properties of as-fabricated and heat-treated samples. The samples at various build heights parallel and normal to the build direction are prepared for electron backscatter diffraction to characterize the microstructure and nanoindentation testing to measure the Young’s modulus and hardness. The as-fabricated sample exhibits microstructural heterogeneity in terms of grain geometry with strong cube texture at various locations. A decrease in hardness along the build direction is observed, while Young’s modulus varies without apparent trend. Heat-treatment homogenizes the microstructure with weaker texture, increasing the hardness of the entire sample by 1.32 GPa. Discussion is focused on linking the observed spatial heterogeneity of the microstructure and hardness to the SLM process.
||Planned: Supplemental Proceedings volume