Mechanical Behavior and Structural Analysis of a TiNi Alloy Annealled in the 300 to 500°C Range and Air Cooled

Lioudmila Aleksandrovna Matlakhova; Everton Maick Rangel Pessanha; Eduardo Atem de Carvalho

doi:10.4028/www.scientific.net/MSF.869.497

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Mechanical Behavior and Structural Analysis of a TiNi Alloy Annealled in the 300 to 500°C Range and Air Cooled
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HomeMaterials Science ForumMaterials Science Forum Vol. 869Mechanical Behavior and Structural Analysis of a...

Mechanical Behavior and Structural Analysis of a TiNi Alloy Annealled in the 300 to 500°C Range and Air Cooled

Abstract:

This work has as objectives the structural analysis and mechanical behavior of a TiNi (46.5Ti-53.5Ni (wt%) / 51.6Ti-48.4Ni (at%)) alloy displaying Shape Memory Effect, manufactured by Light Metals Institute, in Russia, as a ∅ 5.12 mm wire. Samples were annealed at 300 to 550oC, and air cooled afterwards. X-Ray and scanning electron microscopy structural analysis was performed. Mechanical tests by compression testing were made, up to 10% strain, with control unloading, and afterwards continued up to fracture. The alloy has shown itself sensitive to the heat treatment and applied strain. In the alloy, after annealing at different temperatures in the interval of 300 to 550oC, phases B19’, R and Ti₂Ni, were identified. Along higher annealing temperatures, up to 550oC, R phase was replaced by B2. In this alloy, strain induced Martensitic Reversible Transformations (MRT) type B2/R→B19 ́/R_def were induced.

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Materials Science Forum (Volume 869)

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497-502

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.869.497

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Online since:

August 2016

Authors:

Lioudmila Aleksandrovna Matlakhova*, Everton Maick Rangel Pessanha, Eduardo Atem de Carvalho

Keywords:

Compressive Strain, Heat Treatment, Structural Analysis, TiNi Alloy

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