Abstract
Due to their superior mechanical properties, formability, corrosion resistance, and lightweight nature, 6xxx series aluminum (Al) alloys are considered as a promising structural material. Nevertheless, the successful application of these materials depends on their response to the external environment. Recently, designers considered the surface properties an equally important aspect of the component design. Due to this concern, these alloys are subjected to varieties of surface modification methodologies. Many methodologies are explored to modify the 6xxx series Al alloys surfaces effectively. These methods are anodizing, plasma electrolytic oxidation (PEO), cladding, friction stir processing, friction surfacing, melting, alloying, and resolidification using high energy beams, etc. This review work discusses some of these methods, recent research activities on them, important process variables, and their role on the final properties of the surfaces.
Highlights
Friction stir processing (FSP) is a surface modification technology based on the principles of friction stir welding (FSW), which is helpful in enhancing specific properties by facilitating local microstructural change [69,70]
Rathee et al [99] compared the strengths of various particle addition methods during FSP to fabricate a surface composite, and they observed that the use of grooves to deposit reinforcements exhibits homogenous surface composite
This review article elucidated a comprehensive discussion on various surface modification techniques for 6xxx series Al alloys
Summary
This alloy is considered a structural alloy with medium strength. It probably has the lowest quantity of alloying elements in 6xxx series Al alloys, which are of practical relevance. It is used in tubing form for various profiles for furniture used in buses and railways
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