Joining of Corrosion-resistant Metal Foil to Magnesium Alloy by Shot Peening

Abstract

To improve the surface properties of magnesium alloys, shot peening was used to joined dissimilar metal foils. The joining of magnesium alloys with dissimilar metal foils was investigated to improve the surface properties. In the experimental method, the metal foils were pure titanium, pure copper, pure nickel, pure iron and stainless steel. The thickness of the metal foil was 0.2 to 0.4 mm. Shot peening was performed on a centrifugal shot peening machine. The shot media was cast steel with an average diameter of 1.0 mm. The peening velocity and peening time were 60 m / s and 10 s, respectively. After joining, no voids or cracks were observed at the joining interface. In bending test, the metal foil did not peel off even when the substrate was broken. In addition, the bondability of dissimilar metal foils was improved by heat treatment at 450 °C. Wear resistance was also improved by the joining of stainless steel foil. This method was effective for surface modification of magnesium alloys.