Cryogenic Impact Testing of Metallic Glass Matrix Composites

Cryogenic Charpy Impact Testing was employed to investigate the impact toughness of Vitreloy 1 (Zr_41.2, Ti_13.8, Cu_12.5, Ni_10.0, Be_22.5), DH3 (Zr_39.6, Ti_33.9, Nb_7.60, Cu_6.40, Be_12.5) and Tin (Sn) on a temperature scale of (100K-300K). DH3 BMGMC was compared to the monolithic glasses (Vitreloy 1 and DH3-Matrix). There was a ductile to brittle transition in the mechanical performance of DH3; however, the ductile to brittle transition was small in comparison to other contending BCC metals. The dislocation motion in the BCC-phase of DH3 decreases at lower temperatures but has higher impact toughness than monolithic glasses Vitreloy 1 and DH3-Matrix.