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Metals 2017, 7(4), 141; doi:10.3390/met7040141

Dynamic Recovery and Superelasticity of Columnar-Grained Cu–Al–Mn Shape Memory Alloy

1
Key Laboratory for Advanced Materials Processing of the Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China
2
Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
*
Authors to whom correspondence should be addressed.
Academic Editor: Takuo Sakon
Received: 23 March 2017 / Revised: 9 April 2017 / Accepted: 11 April 2017 / Published: 15 April 2017
(This article belongs to the Special Issue Shape Memory Alloys 2017)
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Abstract

The columnar-grained Cu71.5Al17.5Mn11 shape memory alloy was treated by single-pass hot rolling at 900 °C with a thickness reduction of 67.3% followed by immediate water quenching. Dynamic recovery other than discontinuous dynamic recrystallization occurred during the treatment process, bringing about retained columnar grains with <001> textures, as well as dislocations introduced into the parent matrix. As a result, a large maximum recoverable strain of more than 11% was maintained due to the retained beneficial grain characteristics. The critical stress for inducing martensitic transformation and stress hysteresis were enhanced mainly due to the existence of dislocations. View Full-Text
Keywords: shape memory alloy; Cu–Al–Mn; columnar grain; hot deformation; dynamic recovery; martensitic transformation; superelasticity shape memory alloy; Cu–Al–Mn; columnar grain; hot deformation; dynamic recovery; martensitic transformation; superelasticity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, S.; Huang, H.; Xie, J.; Kimura, Y.; Xu, X.; Omori, T.; Kainuma, R. Dynamic Recovery and Superelasticity of Columnar-Grained Cu–Al–Mn Shape Memory Alloy. Metals 2017, 7, 141.

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