Evaluation of Fatigue Failure of S960QL Steel in the Conditions of Plastic Strain

Abstract:

The article presents the results of research on low cycle fatigue strength of high-strength structural steel S960QL. During the tests, controlled force was applied using the different total strain amplitude ε_ac and strain ratio R_ε = 0.1. The obtained results allowed to determine the value of the cyclic strain hardening exponent n' and the cyclic strength coefficient K' and to draw the cyclic stress-strain curve. Analysis was also carried out of fatigue life based on the Manson-Coffin-Basquin equation. Fatigue values were also determined. Fractographic tests of fatigue fractures allowed to identify the causes of crack initiation and the course of their propagation.

• Periodical: Solid State Phenomena (Volume 250)
• Pages: 175-181
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.250.175
• Online since: April 2016
• Authors: Tomasz Ślęzak*, Lucjan Sniezek, Janusz Torzewski, Volodymyr Hutsaylyuk
• Keywords: Fatigue Life, Fatigue Strength, High-Strength Steels

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