Nano Mechanical Characterization and Physical Modeling of Plastic Deformation Chapter 1: Dislocation-Grain Boundary Interaction as a Strengthening Factor

Mechanical behaviors of metallic materials in a small scale are characterized and physically modeled based on experimental measurements and computational simulation. Local plasticity in the vicinity of a grain boundary is considered in terms of an interaction between dislocation and with a geometrical or a chemical factor. Molecular dynamic simulation revealed that the geometrical effect depends on not only a misorientation but also a combination with a dislocation character. TEM in-situ straining has a great potential to measure directly a critical stress upon slip discussed based on both the experimental results by TEM in-situ observation and the atomistic simulation in bcc metals.

Automated summary

The mechanical behaviors of metallic materials in a small scale have been characterized and modeled based on experimental measurements and computational simulation. The interaction between dislocation and grain boundary is considered, taking into account both geometrical and chemical factors. Molecular dynamic simulation reveals that the geometrical effect is influenced not only by misorientation but also by the dislocation character. TEM in-situ straining has the potential to directly measure the critical stress upon slip, as discussed based on both experimental results and atomistic simulation in bcc metals.