827 複合表面性質処理を施したチタン合金 (SP-700) の疲労特性

概要

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The purpose of this study is to investigate the effect of the hybrid surface modifications on the fatigue properties of titanium alloy (SP-700). Rotational bending fatigue tests were performed on five types of specimens with different surface treatments. The results are summarized as follows : 1) The fatigue strength of the WPC treated specimen was larger than that of the untreated specimen. This is because, WPC process generates the hardened layer with compressive residual stress. 2) There was no difference in fatigue strength between the untreated and the physical vapor deposited specimen. At high stress levels, however, the fatigue lives of the specimen with TiN film were longer than that of the untreated ones. 3) The fatigue strength of the hybrid surface modified specimen was decreased less than that of the WPC treated specimen. This is because, the heat treatments during PVD process reduce the compressive residual stress.
一般社団法人日本機械学会の論文
2000-07-31