1319 SUS316ねじり疲労での活動すべり系と疲労き裂発生のEBSD・AFM複合解析(S21-2 疲労破面性状と疲労微視組織の解析,S21 金属材料の疲労特性と破壊機構)

概要

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Electron backscattering diffraction (EBSD) method and atomic force microscopy (AFM) were utilized to investigate the active slip systems and fatigue crack initiation behavior in stainless steel, SUS316NG, under torsion. The analysis of active slip systems based on Schmid factor shows that most grains possess the slip plane with the largest Schmid factor value as their primary slip plane. Fatigue cracks were divided into 4 types: GB (Grain Boundary), TB (Twin Boundary), SB (Slip Band), TC (Transcrystalline). The results of crack density distribution in comparison with the earlier research in tensional fatigue tests show that under low loading level TC cracks dominate the initiation stage regardless of the loading mode. The profile at the cross section of SB crack was measured by AFM. The observed tilt angle of slip plane agrees very with its theoretic value.
一般社団法人日本機械学会の論文
2005-09-18