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Properties of Cu-based shape memory alloys

Copper based shape memory alloys (SMAs) are very important metallic materials for different application. The main advantage of Cu-based SMA are their low price in compared to other SMAs. Condition for memory effect is presence of phase transformation austenite to martensite. The comparison main properties of Cu-based shape memory alloys in relation to Ni-Ti shape memory alloys is given. Properties of Cu-Al-Ni alloys are superior to those of Cu-Zn-Al alloys. In the work results of investigation Cu-based shape memory alloys are presented with accent on metallography analysis, mechanical testing, thermal analysis and corrosion properties.

shape memory alloys, martensite microstructure, corrosion

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