合金鋼ＳＣｒ，ＳＣＭ調質平滑材の疲労寿命予測法　（金属材料技術研究所データシートに基づく考察）

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  • A method for predicting fatigue life of heat-treated low-alloy steels, SCr and SCM. (Estimation based on the data sheets of national research institute for metals).
  • ゴウキン コウ SCr SCM チョウシツ ヘイカツザイ ノ ヒロウ ジュミョ

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Various kinds of low-alloy steels have been used widely for machines and structures. Accordingly, it is an important task to estimate the fatigue lives oflow-alloy steels. Although many fatigue data sheets have been published, they have large scatter, and it seems to be difficult to directly predict the fatigue lives from the raw data. In this study, using two kinds of low-alloy steels (SCr440 and SCM435) the systematic fatigue tests were carried out. An effective and convenient method based on the small-crack growth law and tensile strength is presented for estimating the fatigue life of plain members. Moreover, the validity of this method is checked applying it to the data sheets by the Japan National Research Institute for Metals.

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