Microstructure and Corrosion Behavior of Laser Cladding Al₃Ti-Based Composite Coatings on AA6063 Aluminum Alloy

Abstract:

Intermetallic compound Al3Ti-based IMC coatings were formed on AA6063 aluminum alloy by laser cladding. The microstructure and corrosion characteristics in 3.5% NaCl solution were investigated. The results show that, the laser cladding coating is made up of Al3Ti dendrites, interdendritic α-Al and uniform distribution of TiC which hardly melted during laser irradiation, and shows good bonding to the substrate. The cross distribution of Al3Ti and α-Al helps to avoid the generation of cracks in the coating. The corrosion resistance of the laser cladding coatings is greatly increased as compared with the substrate, which owes mainly to the existence of hard Al3Ti and TiC. And with the increasing of TiC content in the coating, the corrosion resistance is improved simultaneously.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2973-2978
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2973
• Online since: January 2013
• Authors: Huan He, Yue Chun Fu, Wei Hua Guo, Min Xiao, Xing Zhi Pang, Xiao Ming Shen, Jian Min Zeng
• Keywords: Corrosion, Microstructure

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