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Metals 2016, 6(7), 160; doi:10.3390/met6070160

The Effects of Corrosive Media on Fatigue Performance of Structural Aluminum Alloys

1
Department of Engineering Mechanics, School of Aerospace Engineering, AML, Tsinghua University, Beijing 100084, China
2
Engineering Research & Development Center, AVIC SAC Commercial Aircraft Company LTD, Shenyang 110850, China
*
Author to whom correspondence should be addressed.
Academic Editor: Filippo Berto
Received: 3 June 2016 / Revised: 3 July 2016 / Accepted: 7 July 2016 / Published: 13 July 2016
(This article belongs to the Special Issue Fatigue Damage)
View Full-Text   |   Download PDF [3840 KB, uploaded 13 July 2016]   |  

Abstract

The effects of corrosive media on rotating bending fatigue lives (the cyclic numbers from 104 to 108) of different aluminum alloys were investigated, which involved the corrosion fatigue lives of five kinds of aluminum alloys in air, at 3.5 wt. % and 5.0 wt. % NaCl aqueous solutions. Experimental results indicate that corrosive media have different harmful influences on fatigue lives of different aluminum alloys, in which the differences of corrosion fatigue lives depend strongly on the plastic property (such as the elongation parameter) of aluminum alloys and whether to exist with and without fracture mode II. The other various influence factors (such as the dropping corrosive liquid rate, the loading style, and the nondimensionalization of strength) of corrosion fatigue lives in three media were also discussed in detail by using the typical cases. Furthermore, fracture morphologies and characteristics of samples, which showed the different fatigue cracking behaviors of aluminum alloys in three media, were investigated by scanning electron microscopy (SEM) in this paper. View Full-Text
Keywords: aluminum alloy; corrosive environment; fatigue performance; rotating bending test; relative strength aluminum alloy; corrosive environment; fatigue performance; rotating bending test; relative strength
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Yang, H.; Wang, Y.; Wang, X.; Pan, P.; Jia, D. The Effects of Corrosive Media on Fatigue Performance of Structural Aluminum Alloys. Metals 2016, 6, 160.

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