Laser Surface Alloying

The material processing procedure, which utilizes a high-power density laser, was made to focus on a metal coating to melt the thin layer of the substrate is called Laser Surface Alloying (LSA). It is one of the efficient processes to fabricate material for proper microstructure and non-equilibrium solidification. These fabricated materials have shown good corrosion and wear resistance than the base material of several alloys. Compared to traditional methods like welding, thermal spraying, etc., LSA had the advantage of the constrained heat-affected zone (HAZ), high density, and good mechanical properties. Surface modification using laser alloying of various materials, processing techniques, properties of the alloying surfaces, and combination of multiple alloys and elements to the laser surface modification are described in detail, along with the favorable conditions for adhesive wear.

Keywords: Alloying surface, Aluminum, Ceramics, Cracks, Dilution, Hardness, Heat affected zone, Inconel alloys, Interface, Laser surface alloying, Mechanical properties, Metallic glass, Microhardness, Powders, Porosity, Process techniques, Titanium, Solidification, Stainless steel, Wear.