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Bending fatigue strength of aerospace quality gear steels at ambient and elevated temperatures

Lookup NU author(s): Dr Timothy Lisle, Christian Little, Christopher Aylott, Professor Brian Shaw

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2022 The Authors. Gear bending fatigue testing was conducted on six commercial aerospace quality steels, in the carburised, shot-peened and super finished condition, establishing S-N curves at ambient and elevated temperatures, providing evidence of higher than predicted strength established in accordance with ISO 6336:2006. At elevated temperatures, a systematic drop in mean strength was experienced for all candidate steels. Detailed fractography established the fracture initiation site, unique to each steel, illustrating a propensity for surface initiation in the finite life region and subsurface beyond the knee point, whilst certain grades displayed a distinct change in the location of fracture initiation at elevated temperatures.

Publication metadata

Author(s): Lisle TJ, Little CP, Aylott CJ, Shaw BA

Publication type: Article

Publication status: Published

Journal: International Journal of Fatigue

Year: 2022

Volume: 164

Print publication date: 01/11/2022

Online publication date: 09/07/2022

Acceptance date: 06/07/2022

Date deposited: 10/08/2022

ISSN (print): 0142-1123

ISSN (electronic): 1879-3452

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.ijfatigue.2022.107125

DOI: 10.1016/j.ijfatigue.2022.107125

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