|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Large-scale Metallic Components
||Modified Inherent Strain Method for Wire Arc Additive Manufacturing
||Wen Dong, Albert To
|On-Site Speaker (Planned)
Wire arc additive manufacturing (WAAM) has drawn increasing attention due to its ability to print large metal parts. However, the large product size requires more heat input and also weakens heat dissipation, resulting in significant heat accumulation during the deposition. The present work extends the modified inherent strain method (MIS) to account for this heat accumulation and studies its influence on residual stress and distortion of parts printed by the WAAM process. For a given part, instead of using a uniform inherent strain vector over the entire part, a series of temperature-dependent strain vectors are calculated through the detailed process simulation and applied in the MIS-based part-scale simulation according to the temperature distribution of the deposit. The effect of solid-state phase transformation in WAAM-processed Ti6Al4V is also incorporated into the model when determining the inherent strains. The proposed method is experimentally validated and shows good accuracy.
||Additive Manufacturing, Modeling and Simulation,