Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 25, 2025 - November 29, 2025
In the field of transportation equipment such as automobiles and aircraft, the use of light metals instead of steel materials is progressing. In particular, magnesium alloys are lightweight and have high specific strength. Furthermore, they have excellent vibration absorption, machinability, and electromagnetic wave shielding properties, so their use as electronic device housings is expanding. However, their corrosion resistance is lower than that of steel materials. Therefore, research is being actively conducted on coating magnesium alloys with highly corrosion-resistant and wear-resistant materials using many surface treatment techniques such as plating and deposition. In the present study, shot lining, a joining method that applies shot peening, was performed to improve the corrosion resistance of magnesium alloys. The experimental materials used were commercially available flame-retardant magnesium alloy extruded round bars. The corrosion-resistant metal foil was pure titanium foil with a thickness of 0.02 to 0.04 mm. Pure titanium foil was joined to magnesium alloy by shot lining, and the joining property was investigated by bending tests. The main results are as follows. Pure titanium foil with a thickness of 0.04 mm could be joined at a processing temperature of 350 °C. It was found that the use of a pure aluminum foil insert material was effective in improving the bondability. In the workpiece bonded with a 0.04 mm thick titanium foil, it was found that the bondability was improved by heat treatment at 450 °C or higher.
