Progress of laser surface treatment on magnesium alloy

Abstract

Magnesium (Mg) metals have been widely used in various fields as one of the most promising lightweight structural materials. However, the low corrosion resistance and poor mechanical properties restrict its applications. Surface treatments are common approach to enhance the mechanical strength and corrosion resistance of Mg metals. Among them, laser surface treatment generates novel tissues and structures in situ on the sample surface, thereby improving properties of mechanical strength and corrosion resistance. We briefly describe the changes in surface organization that arise after laser treatment of Mg surfaces, as well as the creation of structures such as streaks, particles, holes, craters, etc., and provide an overview of the reasons for the alterations. The effect of laser processing on wettability, hardness, friction wear, degradation, biocompatibility and mechanical properties were reviewed. At last, the limitations and development trend of laser treatment on Mg metals research were further pointed out.

Aplicación de láser a recubrimientos de proyección térmica base níquel, sobre acero al carbono

“…Algunas posibilidades más recientes incluyen la utilización de radiación láser pulsante (Cuao et al, 2021), el planteamiento de su uso como una tecnología verde (Zhong et al, 2022) ó su empleo para modificar materiales de interés para uso biomédico, como las aleaciones de magnesio (Zhang et al, 2022).…”

Microstructure and Corrosion Resistance of AZ91 Magnesium Alloy after Surface Remelting Treatment

“…The presence of the β phase promotes the formation of galvanic cells in the material, as a result of which the α-Mg phase, acting as an anode in the galvanic pair, dissolves quickly [45]. As can be seen, the β phase could play dual roles in the corrosion of α-Mg; it can be either a galvanic cathode or a barrier to corrosion, depending on its size, distribution, and fraction [14,46,47].…”