Combined experimental and theoretical study on the effect of Nb content on martensitic transformation of NbRu shape memory alloys |
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| Authors: | Tan Chang-Long Cai Wei and Tian Xiao-Hua |
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| Institution: | College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| 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 Nb50+xRu50-x β phase. The
results show that an increase in Nb content increases the stability
of Nb50+xRu50-x β phase, leading to a
significant decrease of the β to β' 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. |
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| Keywords: | high-temperature shape memory alloy NbRu electronic
structure martensitic transformation |
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