KCl単結晶の鋼球および四角すい圧子押し込みによる変形

概要

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In order to elucidate the mechnism of friction and wear, it is necessary to have a knowledge on deformation in materials produced by invasion of sharp projections or wear particles. In this study, the cleaved faces of KCl single crystal were indented with a steel ball or a Vickers diamond indentor. The deformation and hardness around the indentation were e3iamined from macroscopic viewpoints, and the dislocation patterns were observed from microscopic one. The results obtained are as follows : (1) The indents formed on the indented surfaces with a ball or a pyramid were not perfectly circular nor square in shape due to the crystal anisotropy. (2) The appearances of the pile-up and sink-in around indents were clarified. (3) The strain hardening around the indent was more active in the <110> direction than in the <100>. (4) The deformed area on {100} face with a ball or pyramidal indentor consisted of a high dislocation density range and a wing shaped area of comparatively low density extended along the <110> and <100> directions. (5) The hardness and the dislocation density were related each other. (6) The etch pit patterns in the cleaved cross section were observed on {110}_<45> faces.
社団法人日本材料学会の論文
1992-06-15