|About this Abstract
||MS&T22: Materials Science & Technology
||Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
||Mesoscale Modeling of the Additively Manufactured 316L: Effects of Microstructure and Microscale Residual Stresses
||Mohammadreza Yaghoobi, Yin Zhang, Krzysztof S. Stopka, David J Rowenhorst, Ting Zhu, John E. Allison, David L. McDowell
|On-Site Speaker (Planned)
Microstructure and residual stresses play a key role in the response of components produced by Additive Manufacturing (AM). While macroscopic residual stresses are commonly considered in computational models, the effect of micro-residual stress is less well established. The current work investigates the effects of microstructure and micro-residual stresses on the response of AM stainless steel. A crystal plasticity model is developed as an extension of the Armstrong–Frederick cyclic hardening plasticity model which captures the tensorial evolution of backstress induced due to micro-residual stresses. Open source PRISMS-Plasticity and PRISMS-Fatigue software are used to conduct large scale CPFE simulations and fatigue analysis. Reconstructed AM stainless steel microstructures are used to investigate the interaction of micro-residual stresses with the microstructural features on cyclic responses including stress-strain and elastic lattice strain. The effect of micro-residual stresses and microstructure on the microscopic response including the local plastic slip and fatigue driving forces is addressed.