|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||A-34: Physics Based Modeling of Laser Powder Bed Fusion Process Applied to Inconel 718
||Ranadip Acharya, John Sharon, Alexander Staroselsky, Tahany El-Wardany, Vijay Jagdale, Gajawalli Srinivasan, William Tredway
|On-Site Speaker (Planned)
In the powder bed fusion process, material is deposited layer-by-layer by utilizing a heat source to melt the powder material of interest on a substrate or previously deposited layer. Melting, re-melting and solidification processes introduce thermal gradients in the material which give rise to residual stresses and distortions. The melt pool analysis accounts for moving heat source, melt convection and Marangoni effect in order to accurately estimate its shape and temperature distribution. The results obtained from melt pool analysis were further used for as-deposited microstructure prediction. Using fully coupled phase-field equations, the development and growth of dendritic structures has been analyzed. Models are validated using single track laser powder bed deposition experiments for Inconel718 feedstock. Predicted melt pool shapes, microstructures specific for different processing parameters have been compared against experimental melt pool dimensions and dendritic structure. Finally, the developed modeling framework allows predicting the microstructure-driven mechanical properties of additively-manufactured parts.
||Planned: Supplemental Proceedings volume