|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||A-28: Incorporating Complex Thermal Histories in Grain Microstructure Simulations of Additively Manufactured 316L SS
||Kyle Johnson, Theron M. Rodgers, Joseph E. Bishop
|On-Site Speaker (Planned)
Predicting microstructure evolution due to the rapid solidification and complex thermal histories of additive manufacturing (AM) is key to understanding the resulting process-structure-property relationships. To meet this objective, this research employed numerical heat transfer modeling combined with kinetic Monte Carlo (KMC) simulations. Previously, the KMC technique has been utilized to predict grain morphology using linear temperature gradients without time evolution. To further refine microstructure predictions using this method, spatial temperature histories were generated by simulating the production of a 316L stainless steel tube via powder bed technique. The temperature histories were then used in KMC simulations to model microstructure evolution of grain morphology. These results provide a novel methodology linking physically based thermal simulations to microstructure. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under Contract DE-AC04-94AL85000.
||Planned: Supplemental Proceedings volume