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Effect of contact stress and slip amplitude on fretting fatigue behaviour of ultrasonic surface nanocrystallized TC11 titanium alloy

Authors :
Kaifa Fan
Daoxin Liu
Can Wang
Jing Yang
Yanjie Liu
Xiaohua Zhang
Junfeng Xiang
Magd Abdel Wahab
Source :
Journal of Materials Research and Technology, Vol 28, Iss , Pp 4052-4064 (2024)
Publication Year :
2024
Publisher :
Elsevier, 2024.

Abstract

In this paper, combined experimental and numerical methods are applied to investigate the effect of different contact stress and slip amplitude on the fretting fatigue (FF) behaviour of TC11 titanium alloy with gradient nanostructure introduced by ultrasonic surface rolling process (USRP). The properties of gradient nanostructure are characterized using scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray residual stress tester, microhardness tester. As evidenced by the FF experimental results, USRP can significantly improve the FF life of TC11 by introducing large compressive residual stress and work hardening layer. The dominant parameters in improving the FF resistance under different loading conditions are investigated. In addition, the simulated results from Abaqus show that contact stress plays a more important role in influencing FF life compared to fretting bridge span, which is attributed to the change in slip amplitude and stress concentration. Fretting fatigue life initially increases and then decreases with contact stress and there is a contact stress threshold that leads to minimum lifetime. This threshold of USRP specimens is greater than that of untreated specimens. The transition of fretting mode along with contact stress is observed and discussed.

Details

Language :
English
ISSN :
22387854
Volume :
28
Issue :
4052-4064
Database :
Directory of Open Access Journals
Journal :
Journal of Materials Research and Technology
Publication Type :
Academic Journal
Accession number :
edsdoj.2c5a7357809a45eea39390ae66f03810
Document Type :
article
Full Text :
https://doi.org/10.1016/j.jmrt.2024.01.020