Dresden 2003 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

M: Metallphysik

M 41: Postersitzung

M 41.30: Poster

Donnerstag, 27. März 2003, 14:30–16:30, HSZ

Microstructure, thermal stability and mechanical properties of a Zr-Nb-Cu-Ni-Al alloy wich were prepared by using different casting systems — •Nicolle Radtke, Jürgen Eckert, Uta Kühn, Valeria Porcarelli, and Ludwig Schultz — IFW Dresden; Postfach 27 00 16; 01171 Dresden

We report about the microstructure, thermal stability and the mechanical properties of a slowly cooled Zr-Nb-Cu-Ni-Al alloy with a glassy matrix and ductile bcc precipitates wich were prepared by using different casting systems. We compare the influence of injection casting, centrifugation casting and die casting. These three casting techniques have different characteristics and, hence, lead to different cooling conditions. The phase formation and the microstructure of the composite material are investigated by X-ray diffraction, thermal anlaysis, scanning electron microscopy and EDX-analysis. The cooling conditions determine the dendrite sizes and the volume fraction of the bcc phase, consequently yielding different microstructure and exothermic reactions. The correlation between the resulting microstructure and the room temperature deformation behavior will be critically discussed. The partial financial support of the EU within the framwork of the RTN network on bulk metallic glasses (HPRN-CT-2000-00033) is gratefully acknowledged.