EXPLORING THE MICROSTRUCTURAL EVOLUTION OF INCONEL 718 DURING INGOT BREAKDOWN: OPTIMISING THE COGGING PROCESS

摘要

A microstructural evolution model is used to explore the development of Inconel~(~R) 718 during the early stages of the cogging process. Predictions relating to the evolved structure have been assessed through experimental analysis of as-cogged material. However, in order to improve upon existing levels of microstructural refinement, it has been necessary to explore the influence of the process controlling parameters upon the developing microstructure. In particular, the influences of die velocity and bite size are considered in an attempt to optimise the simulated level of grain refinement. To this end, the commercial Forge3~(~R) software is employed to perform the viscoplastic computational analysis.