Regensburg 2007 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 20: Poster session

MM 20.17: Poster

Dienstag, 27. März 2007, 14:45–18:00, Poster C

Martensite formation in a ductile Cu47.5Zr47.5Al5 bulk metallic glass composite — •Simon Pauly, Jayanta Das, Cécilie Duhamel, and Jürgen Eckert — IFW Dresden, Postfach 27 01 16, D-01171 Dresden

A Cu47.5Zr47.5Al5 alloy was solidified into rods of 2, 3 and 5 mm diameter and the microstructures as well as the elastic and plastic properties were investigated along the length of each rod. It was found that neither the microstructure nor the mechanical properties vary significantly along the length of the specimens, except for the 5 mm diameter rod where the top part was proved to be fully crystalline containing cubic B2 CuZr (austenite) and monoclinic CuZr (martensite) phases. A composite microstructure consisting of B2 CuZr embedded in an amorphous phase was revealed in the other parts of the 5 mm diameter and along the 2 mm and 3 mm diameter rods. The differently solidified alloys show high strength (σy up to 1721 MPa) and a distinct deformability (εp up to 10.1 %) under uniaxial compression and a work hardening-like behavior.