|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Large-scale Metallic Components
||Correlating Microstructure with Thermal Models in Wire-arc Additive Manufacturing of Mild Steel
||Mark Anderson, Jeffrey Shield, Prahalada Rao, Janmejay Kulkarni, Alex Riensche, Surya Kumar
|On-Site Speaker (Planned)
Wire-arc additive manufacturing (WAAM) allows for high deposition rates with low materials cost, providing a feasible route to production of large-scale parts. Some issues with the high deposition rates include the heat variances seen within the part due to the speed of processing. By controlling the thermal evolution the part experiences, we can tailor the microstructure of the part. In this study, we compared the microstructural evolution with thermal characteristics both measured and computed using graph theory for ER70S-6 wire. The goal is to predict microstructural evolution based on graph theory models. The study compared thin wall and trapezoid geometries with varying inter-bead wait times. Microstructurally, the cooling rates were analyzed by comparing the interlamellar spacing of the pearlite phase. The faster cooling rates showed a finer pearlite with less interlamellar spacing while the opposite is observed for slower cooling, and were consistent with the predicted and observed thermal characteristics.
||Additive Manufacturing, Characterization, Solidification