2438 純鉄多結晶体の塑性変形挙動のメゾスケール解析(G03-9 変形・弾塑性挙動(2),G03 材料力学)

概要

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Strain distribution in deformed polycrystalline iron plates was investigated using digital image correlation analysis of scanning electron microscope (SEM) images before and after tensile tests. Orientation of grains was determined by electron backscattering diagrams (EBSD). Magnitude of strain below 1% could be detected with spatial resolution of 4μ×4μ by the digital image correlation analysis. Inhomogeneous strain distribution was observed in and among grains. It was confirmed that each grain was deformed by the activation of a few slip systems of large Schmid factors. When slip axis is nearly normal to the boundary plane, shear is restricted and regions of small strain are formed near grain boundaries. On the other hand, when slip axis is nearly parallel to the boundary plane, the amount of shear is not diminished but the direction of slip is changed to parallel to the boundary plane.
一般社団法人日本機械学会の論文
2007-09-07