Combined experimental and theoretical study on the effect of Nb content on martensitic transformation of NbRu shape memory alloys

doi:10.1088/1674-1056/19/3/037101

Abstract The effect of Nb content on the martensitic transformation of NbRu high-temperature shape memory alloys is investigated by experiments and first-principles calculations. We calculate the lattice parameters, density of states, charge density, and heats of formation of Nb_50+xRu_50-x $\beta$ phase. The results show that an increase in Nb content increases the stability of Nb_50+xRu_50-x $\beta$ phase, leading to a significant decrease of the $\beta$ to $\beta'$ martensitic transformation temperature. In addition, the mechanism of the effects of Nb content on phase stability and martensitic transformation temperature is studied on the basis of electronic structure.

Keywords: high-temperature shape memory alloy NbRu electronic structure martensitic transformation

Received: 22 April 2009
Revised: 15 September 2009
Accepted manuscript online:

PACS:	81.30.Kf	(Martensitic transformations)
	71.20.Be	(Transition metals and alloys)
	64.70.K-
	71.15.Mb	(Density functional theory, local density approximation, gradient and other corrections)
	61.66.Dk	(Alloys )
	82.60.Cx	(Enthalpies of combustion, reaction, and formation)

Fund: Project supported by the Youth Top-notch Innovative Talents Program of Harbin University of Science and Technology.

Cite this article:

Tan Chang-Long(谭昌龙), Cai Wei(蔡伟), and Tian Xiao-Hua(田晓华) Combined experimental and theoretical study on the effect of Nb content on martensitic transformation of NbRu shape memory alloys 2010 Chin. Phys. B 19 037101

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Combined experimental and theoretical study on the effect of Nb content on martensitic transformation of NbRu shape memory alloys

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