Ti 40 Zr 10 Cu 36 Pd 14 비정질기지 복합재의 미세조직과 기계적 특성에 미치는 냉각속도의 영향

In this paper, we demonstrate that the microstructure and mechanical properties in the Ti40Zr10Cu36Pd14 alloy can be tailored by controlling the cooling rate during solidification. A lower cooling rate increases the volume fraction of crystalline phase such as B2 but decreases the free volume of the glassy matrix. The increase of the B2 volume fraction can dramatically enhance the toughness of the composites, since the B2 phase is relatively ductile compared to the glassy matrix and seems to have good interface stability with the matrix. From the experimental results, it was found that there is a transition point in the plasticity of the composites depending on the cooling rate. Here, we explain how the toughness of the composites varies in accordance with the cooling rate in the Ti40Zr10Cu36Pd14 alloy system. (Received April 22, 2016; Accepted May 25, 2016)