Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: M. Hajihashemi, N. Yazdian, M. Ajabshiri and M. A. Asadabad
Pages: [39] - [47]
Received Date: October 21, 2015
Submitted by:
DOI: http://dx.doi.org/10.18642/jmseat_7100121557
Undercarriage components encounter some drastic corrosion and abrasion faults. Therefore, to prevent the occurrence of these phenomena, applying hard-chromium coatings for steels and anodized coatings for aluminum alloys is essential. The aim of this study is to investigate the influence of common surface operations in aviation industries on the fatigue behaviour of the most applicable aerospace alloys (including Al 7075-T6 alloys). Therefore, three different anodizing processes in sulphuric acid, chromic acid solutions, and hard-anodizing type were applied on aluminum alloys and their fatigue behaviour were evaluated by drawing stress-life curves. The results obtained from the stress-life curves of aluminum alloys showed that the presence of anodized coating resulted in the reduction of its fatigue life. Presence of tension stresses arising from the anodized coatings is the main reason for this decrement in fatigue strength.
fatigue, interfaces, anodizing, A17075 alloy, stress-life curves.
