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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1019Martensitic Transformation Behaviour of...

Martensitic Transformation Behaviour of Ti₅₀Pt_50-xCo_x Shape Memory Alloys

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Abstract:

The supercell approach method was used to investigate the effect of partial substitution of Pt with Co on the TiPt potential shape memory alloy. The first-principles calculations were carried out within the generalized gradient approximation to determine the stability of the Ti₅₀Pt_50-xCo_x for x=6.25, 18.75 and 25. We found that the calculated heats of formation and density of states predicted the 6.25 at. % Co to be the most stable structures compared. The elastic properties, thermal coefficient of linear expansion and the density of states results suggest that the partial substitution of Pt with Co decreases the Ms of TiPt with the softening of the Cʹ shear moduli.

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Periodical:

Advanced Materials Research (Volume 1019)

Pages:

385-390

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1019.385

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Online since:

October 2014

Authors:

Rosinah Mahlangu*, Hasani Chauke, P.E. Ngoepe

Keywords:

Coefficient of Linear Expansion, Density of States, Elastic Constants, Martensitic Transformation (MT), Shape Memory Alloy (SMA)

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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