オーステナイト系不銹鋼の高温疲労強度について

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タイトル別名
  • Fatigue Strength of Austenitic Stainless Steel at Elevated Temperatures
  • オーステナイトケイ フシュウコウ ノ コウオン ヒロウ キョウド ニ ツイテ

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抄録

The present work was undertaken to examine the fatigue strength of stainless steel at elevated temperatures, since little work had been done in this field. The specimens used are samples of several austenitic stainless steels such as AISI Type 304, 316, 347, 321 and also iron-base high-Cr high-Ni alloys. Rotating cantilever fatigue tests were made with plain and notched specimens at temperatures 460°C to 700°C, and the results obtained were as follows: (1) The higher the carbon content, the higher was found the fatigue strength in 18%Cr-8%Ni steels, irrespective of their Cr or Ni contents. (2) Whenever the specimens had not fractured after the first 105∼106 times of repetitions of loading, fatigue failure would not occur even if repetition of loading was continued further; therefore a definite endurance limit was obtained which was higher than the yield point of the specimen. (3) The fatigue strength of stainless steels at elevated temperatures was increased by under-stressing, and a significant coaxing effect was observed. It may be concluded that the fatigue strength of austenitic stainless steel at elevated temperatures is affected remarkably by precipitation of chromium carbide and other precipitates.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (10), 645-649, 1960

    公益社団法人 日本金属学会

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