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MM: Fachverband Metall- und Materialphysik
MM 8: Liquid and Amorphous Metals II
MM 8.3: Talk
Monday, March 14, 2011, 15:00–15:15, IFW D
The effect of quenching on the mechanical properties of Ti40Zr10Cu34Pd14Sn2 bulk metallic glass — •Na Zheng1, Mihai Stoica1, Mariana Calin1, Norbert Mattern1, and Jürgen Eckert1, 2 — 1IFW Dresden, Institute for Complex Materials, P.O. Box 27 01 16, D-01069 Dresden, Germany — 2TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
Ti40Zr10Cu34Pd14Sn2 bulk metallic glass (BMG) exhibits large glass forming ability and good mechanical properties. Upon compression tests, it was found that the plastic strain is 3.5% and the corresponding fracture stress is around 2050 MPa. Annealing at elevated temperatures followed by rapid quenching is an effective way to tailor the microstructure of BMG and then change the mechanical properties. In this work, Ti40Zr10Cu34Pd14Sn2 BMG with the diameter of 2 mm was obtained by suction casting. Differential Scanning Calorimetry (DSC) investigations preformed at 20 K/min heating rate reveal the glass transition temperature (Tg) of 673 K and the first onset temperature of crystallization (Tx1) of 726 K. After annealing at temperatures slightly before Tg and in the supercooled liquid region (Tg-Tx1), the BMG samples were quenched in water. The aim is to study the effect of quenching on the mechanical properties of Ti40Zr10Cu34Pd14Sn2 BMG. Additionally, the fracture morphology of these samples is also investigated.