Crack nucleation and growth periods in 30CrMnSiNiA steel under repeated-impact tensile loads
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The article describes the results of a study of the effect of material structure (tempering temperature) and test temperature on the duration of the crack nucleation and growth stages during impact fatigue tests on 30CrMnSiNiA. It was shown that the period of nucleation of microcracks increases with an increasing UTS of the steel. The nucleation of microcracks is not sensitive to temper brittleness of steel. Lowering the test temperature leads to an increase in the crack nucleation period and shortens its growth period.
KeywordsFatigue Brittleness Material Structure Growth Stage Test Temperature
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