Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 11, 2022 - September 14, 2022
Magnesium alloys are increasingly being used in the field of transportation equipment, such as automobiles and aircraft, where energy saving is being promoted. However, the problem with magnesium alloys is that they have lower corrosion and wear resistance than steel materials. Therefore, a lot of research on alloy development and surface modification has been attempted. In the present study, to improve the corrosion resistance and wear resistance of magnesium alloys, dissimilar materials were joined using shot peening. Using a cast steel projection material having a diameter of 1 mm, the projection was performed at a projection speed of 60 m / s and a processing temperature of 300 ° C. The base alloys are AZ31, AZ61, AZX611, and AZ91D. The dissimilar material was an aluminum laminated material containing ceramic powders and a heat-resistant resin sheet. The ceramic powders were alumina and zirconia, with a particle size of 0.1 to 0.3 mm. Resin was a sheet of polyimide, with a thickness of 0.025 mm. The joinability was determined by microstructure observation and bending test. The three-point bending test destroyed the joint surface, but did not cause peeling of dissimilar materials from the substrate. It was also found that wear resistance was improved by joining hard dissimilar materials.
