Speaker
Description
The topic presents a concept of full-field microstructure-based models that can be considered digital shadows of the metallic material's microstructure during numerical simulation of thermo-mechanical treatment. Recent progress in the area of full-field modelling is directly driven by the development of modern metallic materials, often of a multiphase nature. Such microstructure types lead to local heterogeneities influencing material behaviour and, eventually, macroscopic properties of the final product. Commonly used microstructure evolution models and experimental techniques often fail to capture the true complexity of such modern multiphase materials and multistage processes. Information from simplified phenomenological or mean-field models can be deceiving and does not describe the true geometry of microstructural features. In contrast, full-field 2D/3D modelling allows for a comprehensive and closer-to-reality visualisation of microstructures as they evolve, enabling researchers to observe the interactions between grains/phases in 2D/3D at an unprecedented level. At the same time, it has to be emphasised that numerical modelling is not an isolated endeavour; it is closely integrated with experimental methods. The synergy of the two approaches is the basis for modern computational materials science.
The concept of the digital material shadow, stages of the model development, and examples of practical applications to the simulation of microstructure evolution during forming and heat treatment operations will be discussed (e.g. recrystallisation, phase transformations). The selected results will demonstrate the capabilities and limitations of such microstructure-based models in computational material design.
