高マンガン鋼の低サイクル疲労特性

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タイトル別名
  • Low-Cycle Fatigue Properties of High Manganese Content Steel.
  • コウ マンガン コウ ノ テイ サイクル ヒロウ トクセイ

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Fatigue tests in the low-cycle range had been performed to investigate the fatigue crack initiation characteristics under a completely reversed push-pull load. The material used in this test is high manganese content austenitic steel (HM steel) in comparison with a typical austenitic stainless steel SUS304. Then, it is confirmed that there are no differences in the fatigue crack initiation and the relatively small crack growth properties, and that the Manson-Coffin law can be applied to these two kinds of materials. In addition, the gradient in the relationship between the plastic strain and the number of cycles under the strain-controlled condition becomes larger for HM steel than that for SUS304. On the other hand, HM steel shows the same properties as SUS304 in the relation between the cumulative plastic strain and the number of cycles to failure not only under the strain-controlled condition but also under the stress-controlled condition.

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