Effect of cold expansion on fatigue life of anodized Al alloy. Issue 1 (April 2019)

• Record Type: Journal Article
• Authors: Li, Nan; Li, Haitao; Liu, Hongtao; Liu, Changkui
• Is Part Of: IOP conference series. Volume 490:Issue 1(2019)
• Publication Date: 2019-04
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/490/2/022076
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: Anodizing treatment can improve corrosion resistance of aluminum alloy but decrease the fatigue life significantly. Introducing cold expansion before anodizing can increase the fatigue life of the specimen with open-hole structure by 2582% than the anodized one. Scanning electron microscopy (SEM) was employed for microstructure and fracture surface observation. Residual stress distribution near the sample hole edge was measured to elucidate the strengthening mechanism. The results revealed that although anodizing treatment decreases the surface integrity, the cold expansion is an effective method to improve the open-hole structure specimen remarkably.