Abnormal relation between tensile and fatigue strengths for a high-strength low-alloy steel

The microstructure, tensile and fatigue strengths of the high-strength 35CrMo steel with quenched and tempered (QT) and hot-rolled (HR) states were investigated. There is not a commonly linear relation between tensile and fatigue strengths, namely, the HR steel with higher tensile strength has lower...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2022-01, Vol.832, p.142418, Article 142418
Main Authors: Gao, C., Yang, M.Q., Pang, J.C., Li, S.X., Zou, M.D., Li, X.W., Zhang, Z.F.
Format: Article
Language:English
Subjects:
Damage mechanism
Dual phase steels
Fatigue failure
Fatigue strength
Heat treating
High strength low alloy steels
High-strength steel
Hot rolling
Inhomogeneity
Metal fatigue
Microstructure
Quenching and tempering
Steel
Tensile strength
Tensile stress
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Summary:The microstructure, tensile and fatigue strengths of the high-strength 35CrMo steel with quenched and tempered (QT) and hot-rolled (HR) states were investigated. There is not a commonly linear relation between tensile and fatigue strengths, namely, the HR steel with higher tensile strength has lower fatigue strength, which is mainly attributed to microstructural inhomogeneity of the steel and different damage mechanisms under fatigue and tensile loads. In this work, an estimation method of fatigue strength for steels with dual phase is suggested.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2021.142418