Very high-cycle fatigue performance of high carbon-chromium bearing steels with different metallurgical qualities

[Display omitted] •VHCF of GCr15 bearing steel produced by two different melting routes were studied.•VHCF difference is mainly due to the difference of their inclusion characteristics.•Nitride is more detrimental to VHCF performance than other inclusions.•Reasons for crack initiating modes of inter...

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Bibliographic Details
Published in:International journal of fatigue 2023-07, Vol.172, p.107632, Article 107632
Main Authors: Zeng, Qu, Hui, Weijun, Zhang, Yongjian, Liu, Xiangjiang, Yao, Zan
Format: Article
Language:English
Subjects:
Crack initiation
Granular bright facet
High carbon-chromium bearing steel
Inclusion
Very high-cycle fatigue
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Summary:[Display omitted] •VHCF of GCr15 bearing steel produced by two different melting routes were studied.•VHCF difference is mainly due to the difference of their inclusion characteristics.•Nitride is more detrimental to VHCF performance than other inclusions.•Reasons for crack initiating modes of interface and internal cracking were clarified. This study aims to explore the very high cycle fatigue performance of GCr15 bearing steel produced by two different melting routes by ultrasonic fatigue testing. The results show that the fatigue strength of the steel fabricated by continuous casting is still slightly lower (∼4%) than that of the steel by electroslag remelting route mainly due to the difference of their inclusion characteristics. The nitride is more detrimental to fatigue performance mainly due to its internal cracking mode and lower threshold value for granular bright facet formation. Compared with other GCr15 steels in literature, the tested steels exhibit excellent fatigue performance.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2023.107632