|About this Abstract
|7th World Congress on Integrated Computational Materials Engineering (ICME 2023)
|Computationally Derived Correlations for
Process-induced Cracking During AM of Nickel-based Superalloys
|Hector Basoalto, Chizhou Fang, Prashant Shriram Jadhav, Magnus J Anderson, Yu Lu, Lucia Scotti
|On-Site Speaker (Planned)
A multiscale materials modelling framework is presented for simulating the microstructure and mechanical fields during selective laser melting (SLM) of a precipitate strengthened nickel-based superalloy. The approach accounts for physical phenomena associated with the additive process over a number of spatial and temporal scales including solid-liquid-vapour transitions, solidification microstructures (grains and precipitation of ) and defects. A crystal plasticity model is developed for simulation of the mechanical fields and accounts for dissolution and precipitation of particles for the alloy CM247. Stress jumps acting on grain boundaries are extracted, showing the cyclic thermal loading of these boundaries to be sensitive to local texture as well as spatial gradients of the thermal fields generated by the moving heat source. Location of boundaries (relative to the passing melt pool) with high risk of resulting in cracking of a build are identified and discussed in relation to process parameters.