Dresden 2011 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 4: Liquid and Amorphous Metals I
MM 4.2: Vortrag
Montag, 14. März 2011, 11:15–11:30, IFW D
Study of mechanical property and crystallization of a ZrCoAl bulk metallic glass — •Jun Tan1,2,3, Yue Zhang1, Mihai Stoica1, Norbert Mattern1, Fusheng Pan2, and Jürgen Eckert1,3 — 1IFW Dresden, Institute for Complex Materials, P.O. Box 27 01 16, D-01171 Dresden, Germany — 2Materials Science & Engineering College, Chongqing University, 400030 Chongqing, China — 3TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
The mechanical property of Zr56Co28Al16 bulk metallic glasses (BMGs) under compression test at room temperature was investigated. The alloy exhibited high fracture strength of approximately 2136 MPa and a pronounced plastic strain of 10.2%. No strainhardening behavior was observed. The evolution of the morphology of the shear bands on the lateral surface of the as-cast samples was studied using scanning electron microscopy (SEM). The plasticity can be attributed to the formation and interaction of multiple shear bands during deformation. The crystallization behavior was studied by differential scanning calorimetry (DSC) at different heating rates.The crystallization behavior research of this alloy indicates that the precipitation of the B2-ZrCo phase may be further utilized to promote the ductility of the ZrCoAl BMG composites.