Study of Test Temperature Effect on Regularities of Fatigue Crack Propagation in Heat-resistant 15Kh2MFA and 15KhNMFA Steels.

被引：0
|
作者：
Pokrovskii, V.V.
Skorenko, Yu.S.
Karzov, G.P.
Timofeev, B.T.
Leonov, V.P.
机构：
来源：
Problemy Prochnosti | 1982年 / 02期
关键词：
FRACTURE MECHANICS;
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摘要：
The paper presents a procedure for an experimental study of regularities in the fatigue crack propagation in structural steels under normal and elevated temperatures as well as with results of studies in cyclic crack resistance of 15Kh2MFA and 15Kh2NMFA steels at 293 and 623 K. It is shown that the temperature increase from 293 to 623 K results in an insignificant increase in the rate of the fatigue crack growth in the average-amplitude (dl/dN APP GRTH 10** minus **8 m/cycle) section of fracture diagrams, in an increase of the stress intensity factor threshold value and in a significant decrease in the fatigue crack propagation rate at low stress intensity factor levels.
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