Very high cycle fatigue properties of ultrahigh strength steels in the presence of hydrogen
Wenchao Yu,
Wanqing Lv,
Xiaofei He
et al.
Abstract:The very high cycle fatigue (VHCF) properties of 2000 MPa ultrahigh strength martensitic steels after hydrogen pre-charging were investigated by means of ultrasonic fatigue tests. Results showed that the VHCF lives of the experimental steels were drastically decreased by about two orders after pre-charged with a hydrogen concentration of CH = 1.23 wppm. The experimental steel tempered at a higher temperature of 300 °C with some epsilon-carbides and a lower density of dislocations showed higher VHCF lives in th… Show more
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