Abstract
Abstract Pulsed Nd:YAG laser was used to treat the surface of a magnesium alloy to improve the thermal fatigue resistance. The average grain size of the as-received material was reduced to ~3 μm and moreover β-Mg 17 Al 12 was precipitated in different forms. In addition, high density dislocation was acquired. The treated zone could efficiently prevent cracking on the sample surface. The crack growth was curbed within the treated zone and the microhardness increased by 80%. This enhancement was ascribed to the modified microstructural characteristics of the treated surface.
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