Abstract
The metallic materials such as steel, iron, titanium and nickel alloys etc., are extensively used in the automobile, marine, biomedical, aerospace, chemical industry and power generation sector. However, the poor surface properties restricted their wide usage in many applications. Therefore, the surface properties need to be enhanced through novel treatments without affecting the bulk. In recent years, laser surface modification attracts more due to their inherent properties. The laser based surface altering process is appropriate to modify the metallic surfaces in terms of their flexibility, simple operation and process economy. Laser surface modification includes; surface hardening, melting, alloying, cladding and texturing. Thus, from a process engineering, metallurgical reasons and tribologist view point, the laser surface modification process can be recognized as an important topic.
Highlights
In the 20th century, Laser surface alteration played a major role in enhancing the material surface properties
From the analysis found that the microhardness and withstanding voltage of Cu-50Cr are significantly improved by using laser surface melting (LSM) [14]
The surface properties of substrate can be improved by a number of methods such as laser surface alterations such as surface hardening, melting, alloying, cladding and texturing in order to improve the mechanical performance and tribological behavior
Summary
In the 20th century, Laser surface alteration played a major role in enhancing the material surface properties. This is due to the refined, solid solution strengthening and uniform microstructure. This is due to the significant effect of grain refinement on hardness [19]. Laser surface alloying is a material processing technique that utilizes the focused laser sources and produces the high power density to melt the metal coating and a portion of the underlying substrate. The wear loss is highly related to the hardness and base material produces poor wear resistance when compared to clad surface
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