|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Applications of Solidification Fundamentals
||Welding and Solidification Theory Applied to the Prediction of Hot Cracking during Additive Manufacturing of Steels and Superalloys
||Ally Fraser, Austin Dicus, Tao Wang, Wes Roth, Ning Zhou, Mario Epler, Stephane Forsik
|On-Site Speaker (Planned)
Metals that are considered difficult to weld are susceptible to solidification cracking during additive manufacturing. In the conventional welding literature, hot cracking has been extensively studied and various modeling approaches derived from equilibrium and solidification thermodynamic calculations have been proposed to better understand cracking mechanisms. We have reviewed these models and applied them to estimate the cracking susceptibility during additive manufacturing of crack-prone alloys. We found a strong correlation between the cracking susceptibility calculated by these models and the density of cracks observed in as-printed steels and superalloys. We also demonstrated that an approach combining solidification theories and a robust process-and material-based development of laser parameters can be used as guide in the design of steels and superalloys for additive manufacturing applications.
||Additive Manufacturing, Modeling and Simulation, Solidification