Abstract
Elastic property and electronic structure of TiNiPt high-temperature shape memory alloys have been investigated by first-principles calculations using the pseudopotentials plane wave method. The effect of Pt content on the martensitic transformation temperature and transformation type is clarified based on the elastic constants of the B2 phases. It is found that high martensitic transformation temperature is due to a low shear resistance C ′ . Furthermore, the electronic structure mechanisms behind the elastic properties are discussed based on the density of states.
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