Fatigue Life Assessment Based on Crack Growth Behavior in Reduced Activation Ferritic/Martensitic Steel
作者： Shuhei NOGAMI , Yuki SATO , Akira HASEGAWA
DOI: 10.1080/18811248.2010.9711636
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摘要: Crack growth behavior under low cycle fatigue in reduced activation ferritic/martensitic steel, F82H IEA-heat (Fe-8Cr-2W-0.2V-0.02Ta), was investigated to improve the life assessment method of fusion reactor structural material. Low test carried out at room temperature air a total strain range 0.4–1.5% using an hourglass-type miniature specimen. The relationship between surface crack length and fraction described one equation independent range. Therefore, residual could be estimated length. Moreover, microcrack initiation if there one-to-one correspondence number cycles failure. rate by introducing concept normalized rate.
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