Naslov
Influence of Betatisation Temperature on Thermal Transformation Behaviour of CuZn27Al 3 Alloy

Autori
Ćorić, Danko ; Franz, Mladen

Izvornik
Transactions of FAMENA (1333-1124) 28 (2004), 1; 27-34

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
CuZnAl; shape memory; transformation temperatures

Sažetak
Thermal transformation behaviour of the CuZn27Al 3 shape memory alloy has been analysed after betatisation and quenching from the temperatures of 600°C to 800°C. The specific behaviour of the alloy in the thermal transformation range has been analysed by means of differential scanning calorimetry and micrographic testing. The results show a significant dependence of the austenitic martensitic transformation on the temperature of thermal treatment, particularly if T<700°C. Apart from the variation in transformation temperatures there is also a change of characteristic temperature hysteresis which is related to the occurrence of sub-grains and formation of crystals of alpha-solid solution, changing also the chemical composition of the beta-phase. The betatisation above 700°C facilitates the flow of both austenitic and martensitic reactions. With the increase in temperature the betatisation gradually narrows the range of the transformation cycle.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA