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The effect of combined low-cycle fatigue and creep on the life of austenitic stainless steels

  • Mechanical Behavior
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Abstract

Experiments regarding the effect of simultaneous fatigue and creep on life have been performed for a 20 pct Cr-35 pct Ni stainless steel at 700°C. It was found that a life fraction rule, comprising an interaction term besides the terms of pure fatigue and creep damage, adequately accounts for the observed lives. The interaction term contains the product of the fatigue and creep damage, and may physically be interpreted as the damage generation due to the interaction of the fatigue and creep processes. There is evidence that the surface crack density represents a measure of the total damage. The cracks created during the combined fatigue and creep test were both transgranular and intergranular. They were probably nucleated intergranularly and later, during their growth, were transformed to transgranular cracks. As the creep damage of the test was increased gradually, more cracks remained intergranular throughout the test.

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Authors and Affiliations

  1. The Royal Institute of Technology, Fack, Stockholm, Sweden

    R. Lagneborg

  2. Liljeholmens Kabelfabrik AB, Stockholm

    R. Attermo

Authors
  1. R. Lagneborg
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  2. R. Attermo
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formerly with AB Atomenergi, Stockholm.

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Lagneborg, R., Attermo, R. The effect of combined low-cycle fatigue and creep on the life of austenitic stainless steels. Metall Trans 2, 1821–1827 (1971). https://doi.org/10.1007/BF02913411

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  • DOI: https://doi.org/10.1007/BF02913411

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