Microstructure Observation of Ni50Ti45Ta5 Shape Memory Alloy

Chang Wei Gong; Fen Fang Guo; Yu Ming Tian; Yue Sheng Chai

doi:10.4028/www.scientific.net/AMR.391-392.452

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 391-392Microstructure Observation of Ni50Ti45Ta5 Shape...

Microstructure Observation of Ni₅₀Ti₄₅Ta₅ Shape Memory Alloy

Abstract:

The phase transformation and microstructure in solution-treated Ni₅₀Ti₄₅Ta₅ shape memory alloy have been investigated. Two different second-phase particles, (Ti,Ta)2Ni and a tantalum-rich solid solution (β-Ta) mostly located at grain boundaries are observed. The results indicate that the Ta atoms are suggested to replace Ti atoms, instead of Ni atoms in these alloys. Ni50Ti45Ta5 alloy is similar to equiatomic NiTi alloy with near equal transformation temperatures and having one stage transformation. The main lattice twin is type II twin. compound twin also observed because of 5at% Ta addition.

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Periodical:

Advanced Materials Research (Volumes 391-392)

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452-456

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https://doi.org/10.4028/www.scientific.net/AMR.391-392.452

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Online since:

December 2011

Authors:

Chang Wei Gong, Fen Fang Guo, Yu Ming Tian, Yue Sheng Chai

Keywords:

Microstructure, Ni₅₀Ti₄₅Ta₅, Phase Transformation

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