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2008•Chinese Physics LettersOpen access

Effect of Fe on Martensitic Transformation of NbRu High-Temperature Shape Memory Alloys: Experimental and Theoretical Study

Tan Chang-Long, Tian Xiao-Hua, Cai Wei

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Abstract

Effect of Fe on the martensitic transformation of NbRu high-temperature shape memory alloys is investigated by the experiments and first-principles calculations. The results show that Fe is predicted to occupy Ru sites. The addition of Fe increases the stability of Nb 50 Ru 50-x Fe x β phase, leading to the significant decrease of the β to β' martensitic transformation temperature. In addition, the mechanism of the Fe alloying effect is explained on the basis of the electronic structure.

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Effect of Fe on the martensitic transformation of NbRu high-temperature shape memory alloys is investigated by the experiments and first-principles calculations. The results show that Fe is predicted to occupy Ru sites. The addition of Fe increases the stability of Nb 50 Ru 50-x Fe x β phase, leading to the significant decrease of the β to β' martensitic transformation temperature. In addition, the mechanism of the Fe alloying effect is explained on the basis of the electronic structure.

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Available abstract

Effect of Fe on the martensitic transformation of NbRu high-temperature shape memory alloys is investigated by the experiments and first-principles calculations. The results show that Fe is predicted to occupy Ru sites. The addition of Fe increases the stability of Nb 50 Ru 50-x Fe x β phase, leading to the significant decrease of the β to β' martensitic transformation temperature. In addition, the mechanism of the Fe alloying effect is explained on the basis of the electronic structure.

Key concepts: Materials science, Diffusionless transformation, Shape-memory alloy, Martensite, Transformation (genetics), Thermodynamics, Phase (matter), Condensed matter physics

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