Performance of alumina coatings prepared by hard anodizing, micro arc oxidation and detonation spray processes on Al–Mg–Si alloy under fretting wear loading. (April 2014)

• Record Type: Journal Article
• Authors: Kumar, S Anand; Pradhan, Sritam; Raman, S Ganesh Sundara; Gnanamoorthy, R
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 228:Number 4(2014:Apr.)
• Page Start: 454
• Page End: 462
• Publication Date: 2014-04
• Subjects: Fretting wear -- alumina coating -- hard anodizing -- micro arc oxidation -- detonation spray processes; Tribology -- Periodicals; 621.89
• DOI: 10.1177/1350650113513756
• Languages: English
• ISSNs: 1350-6501

Abstract

Hard anodizing, micro arc oxidation and detonation spraying of alumina were done on AA 6063 substrate. Fretting wear tests were done at different normal loads and a constant displacement of 55 µm for 50, 000 cycles at 5 Hz. The micro arc oxidation and detonation spray coated samples exhibited lower coefficient of friction compared to hard anodizing coated and uncoated samples. Both micro arc oxidation and detonation sprayed samples showed superior fretting wear resistance compared to hard anodizing and uncoated samples. However, hard anodizing coated samples exhibited inferior fretting wear resistance compared to uncoated samples due to cracking and fragmentation of brittle and hard anodized layer.