Precipitates Formation in Ti-Ni Equiatomic Alloys due to Annealing Heat Treatment

Abstract:

The use of smart material such as Ti-Ni in actuators application requires an intense mechanical and metallurgical investigation to understand its behavior. This paper studies martensitic transformation using DSC and X-ray diffraction techniques to compare shape memory parameters in Ti-50.2%Ni (A1) and equiatomic Ti-50.0%Ni (A2) Alloys. The as as-received samples were submitted to annealing at 400°C and 500°C for 24 hours then quenched in at 25°C. The influence of heat treatment on martensitic transformations temperatures and the appearance of R-phase were analyzed using DSC and X-ray diffraction.

• Periodical: Materials Science Forum (Volume 643)
• Pages: 49-54
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.643.49
• Online since: March 2010
• Authors: Carlos Augusto Nascimento Oliveira, Euclides Apolinário Cabral De Pina, Cezar Henrique Gonzalez, Carlos José de Araújo, U.S.L. Filho, Oscar Olimpio de Araújo Filho
• Keywords: Heat Treatment, R-Phase Transformation, Ti-Ni Alloy, X-Ray Diffraction (XRD)

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