|About this Abstract
|MS&T21: Materials Science & Technology
|Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
|Grain-scale Residual Stress Modeling in Wire Arc Additive Manufacturing of Haynes 282 Super Alloy
|Santanu Paul, Wei Xiong, Albert To
|On-Site Speaker (Planned)
The most important topic hindering the build success of industrial components using Wire Arc Additive Manufacturing (WAAM) is the understanding of the residual stresses in the component. This study will present a multi-scale thermomechanical finite element (FE) model for predicting the intragranular or Type III residual stresses developed in the component during the layer-by-layer deposition of the WAAM process. The multi-scale model will incorporate the residual distortions computed using the modified inherent strain model and the grain texture predicted by the Discrete Dendrite Dynamics (DDD) method along with the periodic boundary conditions for a static equilibrium analysis for prediction of Type III residual stresses. First, a global thermomechanical analysis of the component will be conducted lasting several thermal cycles. Finally, based on interpolation of the solution from the global analysis onto the outer zone of the sub-model, the local mechanical analysis will be done separately and processed by the sub-model.