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Materials 2016, 9(12), 984; doi:10.3390/ma9120984

Fretting Fatigue Experiment and Analysis of AlSi9Cu2Mg Alloy

1
School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China
2
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
3
China North Engine Research Institute, Tianjin 300400, China
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Received: 29 September 2016 / Revised: 15 November 2016 / Accepted: 23 November 2016 / Published: 5 December 2016
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Abstract

An investigation was carried out in order to study the fretting fatigue behavior of an AlSi9Cu2Mg aluminum alloy. The fretting fatigue tests of AlSi9Cu2Mg were performed using a specially designed testing machine. The failure mechanism of fretting fatigue was explored by studying the fracture surfaces, fretting scars, fretting debris, and micro-hardness of fretting fatigue specimens using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and micro Vickers hardness test techniques. The experimental results show that the fretting fatigue limit (42 MPa) is significantly reduced to approximately 47% of the plain fatigue limit (89 MPa) under 62.5 MPa contact pressure. Furthermore, the fretting fatigue life decreases with increasing alternating stress and increasing contact pressure. The examination results suggest that the stress concentrates induced by oxidation-assisted wear on the contact interface led to the earlier initiation and propagation of crack under the fretting condition. View Full-Text
Keywords: fretting fatigue; fractography; fretting scar; fretting debris; micro-hardness fretting fatigue; fractography; fretting scar; fretting debris; micro-hardness
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, J.; Xu, H.; Su, T.; Zhang, Y.; Guo, Z.; Mao, H.; Zhang, Y. Fretting Fatigue Experiment and Analysis of AlSi9Cu2Mg Alloy. Materials 2016, 9, 984.

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