Fatigue Behavior of Fe-Cr-Ni-based Metastable Austenitic Steels with an Identical Tensile Strength and Different Solute Carbon Contents

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  • 同引張強度かつ異なる固溶炭素量を有するFe-Cr-Ni基準安定オーステナイトステンレス鋼の疲労挙動
  • ドウ ヒッパリ キョウド カツ コトナル コヨウ タンソリョウ オ ユウスル Fe-Cr-Ni キジュン アンテイ オーステナイトステンレスコウ ノ ヒロウ キョドウ
  • Fatigue behavior of Fe-Cr-Ni-based metastable austenitic steels with an identical tensile strength and different solute carbon contens

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Abstract

<p>Fatigue properties of Fe-19Cr-8Ni-0.05C and Fe-19Cr-8Ni-0.14C steels were investigated using a rotating bending fatigue test machine. Fatigue limit of both of the steels were dominated by critical stress amplitude for crack initiation. Because of the austenite stability, the fatigue limit of the Fe-19Cr-8Ni-0.05C steel was 200 MPa higher than that of the Fe-19Cr-8Ni-0.14C steel. Although occurrence of dynamic strain aging in the Fe-19Cr-8Ni-0.14C was expected to improve fatigue limit, the effect did not appear due to the remarkable increase of phase stability that deteriorates positive effects of transformation-induced plasticity and transformation-induced crack closure.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 104 (2), 88-97, 2018

    The Iron and Steel Institute of Japan

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