Cr-Mo-V鍛鋼の疲労損傷発生に対する統計的解析

概要

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In this study, an attempt to analyze the fatigue damage in Cr-Mo-V rotor steel based on a probability theory or statistical mechanics was made. The following results were obtained: (a) A model of distributed "driving force" with uniform "fracture resistance" is applicable for the analysis of two phenomena, i.e., the fatigue crack initiation and the decrease of half value breadth of X-ray diffraction profiles with an increase of fatigue damage in Cr-Mo-V steel forging (b) The driving force shows an exponential distribution. The mean value of the distribution appears to be a monotonic function of the nominal strain of fatigue test. (c) It is reasonable to consider that the change of half-value breadth of X-ray diffraction profiles corresponds to the accumulation of fatigue damage before crack initiation.
社団法人日本機械学会の論文
1996-03-25