Experimental study of mechanical properties of bulk metallic glass under multi-axial stress condition and trial manufacture of specimen

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The purpose of this research is the confirmation of the yield surface of bulk metallic glasses by multi-axial loading method. To carry out this experimental method, the melting arc furnace for the development of the specimen with appropriate shape was designed and fabricated. The specimen manufactured for trial by using the furnace crystallized easily on the cooling process of the melting metal. Therefore the experimental study for the basic yield surface was performed by Zr_<55>Cu_<30> Al_<10>Ni_5 BMG plate specimens. In addition, the method to improve the ductile property of Zr based BMG for tensile load at room temperature by its thermoplastic deformation was found out.