Abstract
The microstructure, mechanical properties, and electrochemical behavior of Ti-12V-9Sn shape memory alloy were investigated, with commercial pure titanium (C.P. Ti) and Ti-12V alloy as controls. The metastable β phase was partially retained and α″ martensite phase was obtained in Ti-12V-9Sn alloy, whereas only martensitic phases (α′ and α″) existed in Ti-12V alloy at room temperature. Ti-12V-9Sn alloy exhibited a good combination of strength and elongation, which showed a “double yield” feature, along with a complete shape recovery strain of 4%. The electrochemical measurements indicated that all of the experimental samples exhibited excellent corrosion resistance in the artificial saliva with and without 0.2% NaF, among which Ti-12V-9Sn alloy possessed the lowest corrosion current density in both kinds of simulated body fluids.
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