题目：Microstructure-based modeling of deformation and failure of martensitic steels

　　报告人：Prof. Alexander Hartmaier

　　         Interdisciplinary Center for Advanced Materials Simulation (ICAMS)
         　　Ruhr-Universität Bochum, Germany

　　时间： 6月25日（周三），9:00—11:00

　　地点：李薰楼468会议室

　　欢迎参加！

　　摘要：

　　In order to model the mechanical performance of martensitic steels, which posses a hierarchical microstructure over several length scales, we need to describe plastic deformation of individual microstructural constituents, like laths, blocks and packets.This is accomplished by applying crystal plasticity models for single crystalline regions and by introducing representative volume elements (RVE) of the rather complex microstructures. It will be demonstrated how such RVE-based micromechanical simulations and homogenization methods can be applied to make predictions on macroscopic mechanical properties of tempered martensitic steels. Furthermore, it will be discussed how the relatively large number of input parameters that is needed for such micromechanical modeling can be obtained either by atomistic simulations or by sophisticated micromechanical experiments.