Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
Magnesium is a lightweight material among practical metals and has a lower density than other metals. In addition, the alloy has several attractive properties such as high strength-to-weight ratio, good machinability, good electromagnetic shielding properties, and recyclability. However, most magnesium alloys require improved corrosion and wear resistance. In the present study, the joining of magnesium alloys to dissimilar metal foils by shot peening was investigated to improve surface properties. In the experimental method, several types of magnesium alloys were commercially available extruded round bars. The alloy type was AZX611, and the metal foils were pure titanium. 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. The substrate and metal foils were heated at 300 oC and 350 oC. 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. This method was effective for surface modification of magnesium alloys.
