摩擦圧接継手のひずみ分布と疲労損傷に及ぼすタフトライド処理の影響

概要

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In the previous report, the fatigue problem in friction welded specimens caused by cyclic stressing was investigated in connection with the microscopic-strain distribution or the strain concentration factor and the occurrence of slip-lines. It was found that the slip-lines in the specimen appear more densely at the parent material where the strain concentration factor is maximum, and the fracture occurs at this location. In the present paper it is intended to find out the influence of the tufftride treatment on the strain distribution and fatigue damage of the friction welded specimen subjected to rotary bending. The results obtained are summarized as follows: (1) The strain distribution or the strain concentration factor in the friction welded specimen is lot influenced strongly by the tufftride treatment. (2) The occurrence of slip-lines in the tufftrided specimen are remarkably restrained and the fatigue limit is improved, but the fatigue fracture is influenced by the microscopic-structure of the specimen, and occurs at the parent material. (3) The depth of diffusion layer by the tufftride treatment is not uniform and depends on the nicroscopic-structure of the specimen.
社団法人日本材料学会の論文
1981-01-15