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概要
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Fatigue test results of the steel containing macroscopic inclusions under many-fold multiple load in two stress levels are presented. The test material is 3%Cr-0.5%Mo alloy steel commonly used for marine turbine rotor shaft. Fatigue tests of large number of cycles up to 10<SUP>8</SUP> were conducted. The primary stresses chosen are 1.2<SUP>σ</SUP>w and 1.5<SUP>σ</SUP>w, in which <SUP>σ</SUP>w is the endurance limit under the constant load amplitude.<BR>The test results indicated that the life of the material containing many macroscopic inclusions of 0.3-0.9 mm in length might be predicted conservatively if the linear damage law would be used, because the value of Σ (n/N) was larger than 1 even when the primary stress was 1.5<SUP>σ</SUP>w.
- 公益社団法人 日本マリンエンジニアリング学会の論文