Fatigue Fracture of Duplex Stainless Steel with Heterogeneous Nanostructure by Heavy Cold Rolling

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  • 冷間強圧延によりヘテロナノ組織を付与した二相ステンレス鋼の疲労破壊
  • レイカン キョウアツエン ニ ヨリ ヘテロナノ ソシキ オ フヨ シタ ニソウ ステンレスコウ ノ ヒロウ ハカイ

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Abstract

<p>Fatigue behaviors of duplex stainless steels with excellent tensile properties brought by heterogeneous nanostructure were examined with changing volume fraction of ferritic-austenitic phases. In as-rolled samples, fatigue strength taken by 107 cycles became double comparing with those of conventional stainless steels. The volume fraction of ferritic-austenitic phases has not affected fatigue behavior. Further, the fatigue strength was improved additionally 200 MPa by aging heat-treatment after cold rolling. The duplex stainless steels with heterogeneous nanostructure possessed enough fatigue strength even in 3%NaCl solution though its fatigue strength declined.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 105 (2), 272-281, 2019

    The Iron and Steel Institute of Japan

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