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Solidification Modelling With CALPHAD:
Process Applications of Equilibrium and Non-equilibrium Models and When to Use Them

Solidification Modelling With CALPHAD

Solidification can take place at many stages of the materials life cycle, impacting the material properties of a given component. For example, segregation can dictate heat treatment schedules. Non-equilibrium behavior can cause undesirable phases to form. Solidification cracking can occur depending on alloy chemistry and process parameters. The ability to accurately predict the solidification path, temperature range, and other thermophysical properties is critical not only for materials design but also for day-to-day process variation. Many models exist to predict both equilibrium and non-equilibrium solidification behaviour using CALPHAD-based tools. Model selection depends on the alloy chemistry and process parameters surrounding a given solidification process. For example, the rapid solidification of laser based fusion processes can necessitate the use of solute trapping models. The slower cooling of casting can require backdiffusion calculations. This presentation will outline the various CALPHAD-based solidification models, and discuss when each should be applied using industry focused case studies.

Speaker: Adam Hope, Thermo-Calc Software

About the Speaker

Adam Hope received his Ph.D. in welding engineering at The Ohio State University in 2016. His work focused on combining computational and experimental techniques to predict susceptibility to weld cracking and developing new weld metal compositions for nuclear power applications. After graduating, Adam joined Thermo-Calc Software where he provides applications support.

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