Influence of microstructural inhomogenities on internal stress and strain distributions during creep

The influence of the microstructure of metallic materials on its creep behavior is complex. Besides the chemical composition, the distinct configuration of the microstructural elements has a major influence on the deformation processes. In the presented work a physically based Finite Element model has been applied to study creep behavior on a microstructural level. The main focus is set on the local influence of grain boundaries and triple points on creep straining. The results indicate that such microstructural configurations lead to a highly heterogeneous creep strain distribution. Thus, this study is an important step to a deeper understanding of complex local interactions of creep phenomena