Abstract
In the present study, joining and caulking of a dissimilar material using shot peening was investigated. The availability of the plastic flow, i.e., the peening droop makes the joining of the dissimilar material possible. This method is similar to caulking. In the experiment, two kinds of shot peening machines, air type and centrifugal type, were employed. In order to examine experimentally the influence of working temperature on joinability, equipment with a heating furnace was produced. Firstly, the influences of processing conditions on the joining between the dissimilar material and the cylindrical substrate were examined. The dissimilar materials were joined to the cylindrical substrate. Secondary, the joining of the dissimilar materials using the peening droop was performed. The bond strength was evaluated by tensile test. The dissimilar materials were successfully joined to the substrate by the peening droop. Bond strength increased with increasing kinetic energy of shots and processing temperature. It was found that the present method using the shot peening process was very effective for joining the dissimilar materials.
