Low-and High-Cycle Fatigue Properties of Carbon Steels, Cr and Cr-Mo Steels Specified in JIS for Machine Structural Use

Fatigue tests and fretting fatigue tests of two steam turbine steels at room temperature and 773 K were carried out. The reduction of fatigue life and strength in the fretting test were significant at 773 K as well as at room temperature. The values of the friction coefficient at 773 K was almost equal to those at room temperature. The geometry of the fretting fatigue crack was flat in the early stage of fatigue life where a significant effect of fretting was observed. With increasing crack length and with a reducing effect of fretting, the fatigue crack shape changed to a semi-circular form. The fretting fatigue lives predicted on the basis of elastic-plastic fracture mechanics analysis, with the frictional force between the fretting pad and the specimen taken into consideration, agreed well with experimental results at both temperatures.

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Low-and High-Cycle Fatigue Properties of Carbon Steels, Cr and Cr-Mo Steels Specified in JIS for Machine Structural Use

Cited by 6 publications

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