Abstract
The character of D03 ordering resulting from different quenching rates and its effect on the characteristic martensitic transformation temperatures and shape-memory effect in the Cu-21.5 at % Zn-12.5 at % Al alloy has been analysed. ln room temperature water-quenched samples with a cooling rate ∼ 1000° C sec−1 showing B2 long-range order and DO3 Short-range order, e significant stabilization of martensite in the reverse transformation was observed. This stabilization was eliminated in the air-cooled samples with a cooling rate ∼20° C sec−1 showing DO3 long-range order. Mechanical tests revealed a more complete shape recovery in the air-cooled samples, when compared to room temperature waterquenched ones.
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