부산대학교 도서관

In this study, using a devised friction welding apparatus which incorporates a pneumatic actuator and gripper to give a precise control of the friction time and pressure, the friction welding of Zr-based bulk metallic glasses (BMG) to crystalline metals has been tried. The shape and volume of the protrusion formed at the weld interface were investigated. As crystalline metals, Ti-alloys, Al-alloys and a Zr-metal were adopted. In order to characterize the friction welded interface, micrographic observation and X-ray diffraction analysis on the weld cross-section were carried out. A successful joining of the Zr-based bulk metallic glasses(BMG) to crystalline metals could be obtained certain pairs of materials combination used and through the precise control of friction conditions. The residual strength after welding bulk metallic glasses(BMG) to crystalline was evaluated by the four-point bending test and compared with the cases of friction welding to similar materials.