Friction stir welding of Zr55Cu50Ni 5Al10 bulk metallic glass

Abstract

A Zr55Cu50Ni5Al10 bulk metallic glass plate was successfully welded below its crystallization temperature by friction stir welding. The flash formation and heat concentration at the shoulder edge was minimized using a wider tool with the shoulder surface recessed by an angle of 3°. To evaluate the crystallization of the weld, the microstructure and mechanical properties were analyzed using DSC, XRD, TEM, and microhardness. As a result, it was found that the amorphous structure and original mechanical properties were maintained throughout the entire joint. © 2009 The Japan Institute of Metals.