Very high cycle fatigue properties of ultrahigh strength steels in the presence of hydrogen-Reference-Cited by-同舟云学术

Very high cycle fatigue properties of ultrahigh strength steels in the presence of hydrogen

Published:2024-09-13 Issue: Volume: Page:
ISSN:0267-0836
Container-title:Materials Science and Technology
language:en
Short-container-title:Materials Science and Technology

Author:

Yu Wenchao¹,Lv Wanqing¹,He Xiaofei¹,Zhu Shipeng²,Wang Maoqiu¹,Shi Jie¹

Affiliation:

1. Institute of Special Steel, Central Iron and Steel Research Institute, No. 9 Qixiang Road, Haidian District, Beijing 100081, P. R. China

2. Shandong Iron and Steel Group Rizhao Co., Ltd, No.1, Lingang Road, Lanshan District, Rizhao, Shandong, 276800, P. R. China

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 the presence of hydrogen. It could be attributed to the lower hydrogen diffusion coefficient since hydrogen might accelerate fatigue crack propagation in the granular bright facet (GBF) area.

Publisher

SAGE Publications

Link

https://journals.sagepub.com/doi/pdf/10.1177/02670836241285333

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