Abstract
This article focused on the effect of ultrasonic surface rolling process (USRP) on the surface morphology, microstructure, microhardness and corrosion behavior of Mg-Gd-Zn-Zr alloy. Due to plastic deformation during USRP, the surface integrity of Mg-Gd-Zn-Zr alloy was reconstructed with the decrease of surface roughness, the introduction of grain refinement and twinning. It contributed to improve the microhardness and corrosion behavior that the surface microhardness increased about 25.5 % to 112.47 HV, and the corrosion current density decreased about 99.86 % to 1.362 × 10-4 μA/cm2. The results indicated that the USRP exhibited good application prospects in improving the surface properties of Mg alloys.
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