Influence of the Deep Cryogenic Treatment at the Phase Transformation Temperatures and at the Stabilization of the Cu-14Al-4Ni SMA Alloy

Marcelo Nava; Pedro Cunha de Lima; Emmanuel Pacheco Rocha Lima

doi:10.4028/www.scientific.net/MSF.1012.331

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Influence of the Deep Cryogenic Treatment at the Phase Transformation Temperatures and at the Stabilization of the Cu-14Al-4Ni SMA Alloy
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HomeMaterials Science ForumMaterials Science Forum Vol. 1012Influence of the Deep Cryogenic Treatment at the...

Influence of the Deep Cryogenic Treatment at the Phase Transformation Temperatures and at the Stabilization of the Cu-14Al-4Ni SMA Alloy

Abstract:

Deep cryogenic treatment (DCT) is industrially applied to improve the wear resistance characteristics of tool steels. However, on non-ferrous metals, the knowledge about the obtained characteristics after DCT is limited. The purpose of this work was to investigate how DCT affects the properties and the behavior of the Cu-14Al-4Ni alloy treated at different times and after thermomechanical cycling was performed. In the present investigation, there was performed a comparative experimental analysis of the transformation temperatures, microhardness and shape recovery capacity of the alloy obtained by smelting, treated by DCT and thermomechanically cycled. The DCT provided the stabilization of the martensitic phase β'₁ and, consequently, the stabilization of the phase transformation temperatures and the shape recovery capacity of the shape memory effect of the alloy, increasing the alloy life.

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23rd Brazilian Conference on Materials Science and Engineering

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Periodical:

Materials Science Forum (Volume 1012)

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331-336

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1012.331

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Online since:

October 2020

Authors:

Marcelo Nava*, Pedro Cunha de Lima, Emmanuel Pacheco Rocha Lima

Keywords:

Cu-Al-Ni Alloy, Deep Cryogenic Treatment, Shape Memory Alloys, SMA

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