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

本研究的目的是用多轴加载法确定大块金属玻璃的屈服面。为实现这一实验方法，设计并制作了适合形状试样发育的熔弧炉。在熔化金属的冷却过程中，用炉制造的试样容易结晶。因此，采用Zr_<55>Cu_<30> Al_<10>Ni_5 BMG板试样进行基本屈服面实验研究。此外，还找到了利用Zr基BMG的热塑性变形来提高其室温拉伸性能的方法。

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.