Effect of Ageing Temperatures on the Transformation Behaviour of Ti-50.7at.%Ni Shape Memory Alloy

Abstract:

Ti-50.7at.%Ni as one of Ni-rich TiNi shape memory alloy is very responsive to precipitation ageing treatment due to the formation of Ti₃Ni₄ precipitates. This study indicates that this alloy exhibits different transformation sequences under different ageing temperatures. Precipitation of Ti₃Ni₄ has introduced the formation of intermediate R-phase prior to martensitic transformation. The lack of 2-step R-phase transformation, B2→R1 and B2→R2 transformation in this alloy, suggested that Ti₃Ni₄ precipitation occurs homogeneously.

• Periodical: Advanced Materials Research (Volume 845)
• Pages: 108-112
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.845.108
• Online since: December 2013
• Authors: Kurnia Hastuti, Esah Hamzah*, Jasmi Hashim
• Keywords: R-Phase, Shape Memory Alloy (SMA), Transformation Temperature

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