A shape memory alloy consisting essentially of, by weight ratio, 2 to 15% aluminium, 0.01 to 3% beryllium and the balance being substantially copper, with impurities being inevitably present in the process of preparation, and a shape memory alloy further including 0.05 to 15% zinc, both including composition...http://www.google.de/patents/US4407776?utm_source=gb-gplus-sharePatent US4407776 - Shape memory alloys
