新しい高温クリープ疲労損傷則に基づく余寿命評価法とそのMod.9Cr-1Mo鋼への適用(<特集>高度強度)

概要

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The idea and procedures are presented for evaluating the remaining life based on a new creep-fatigue damage rule. The proposed method needs only information about crack length at a given number of cycles or crack length change during a given cycles interval and F_<ij> the ratio of the partitioned inelastic strain range to the total inelastic strain range. It is shown that the material damage and the applied inelastic strain range as well as the remaining life of IJ tested Mod.9Cr-1Mo steel can be evaluated when the difference between the measured crack length and the hypothetical initial crack length or the measured crack length change is greater than 30μm, and that the respective accuracy in predicting each of the remaining life, the applied inelastic strain range and the material damage is within about factor of 3〜4, 2.5〜2.8 and 1.5〜3.
社団法人日本材料学会の論文
1999-02-15