engleski

MICROSTRUCTURE EVOLUTION AND THERMAL STABILITY OF RAPIDLY SOLIDIFIED AI-Ni-Co-RE ALLOY

In the frame of this work, AI-5NM Co-3RE (RE-Rare Earth (Mischmetal)) rapidly solidified ribbons were manufactured and analyzed. The morphology of the as-cast structure, as well as the microstructural features were analyzed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).Thermal stability has been investigated by combination of four point scanning electrical resistivity measurement (ER), differential scanning calorim-etry (DSC) and microhardness measurement. From the results we can conclude, that AI-5Ni-1Co-3RE rapidly solidified alloys have good thermal stability due to very slow coarsening kinetics of precipitated particles.

apid solidification; metallic materials; heat transfer; precipitation; electrical resistivity measurement

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