Effect of Hot Rolling on the Thermomechanical properties of a Superelastic Cu-Al-Be-Cr Alloy

Shape memory alloys are generally produced by casting processes and are subsequently homogenized. However, to obtain semifinished products on an industrial scale, the ingots from the casting process must be hot worked. In particular, final bar and sheet products can be obtained by hot rolling proces...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2020-01, Vol.23 (1), p.1
Main Authors: Candido, Gemierson Valois da Mota, Oliveira, Danniel Ferreira de, Brito, Ieverton Caiandre Andrade, Caluête, Rafael Evaristo, Andrade, Breno Henrique da Silva, Cavalcante, Danielle Guedes de Lima
Format: Article
Language:English
Subjects:
Abnormal Grain Growth
Alloys
Casting
Chromium base alloys
Copper
Copper base alloys
Correlation analysis
ENGINEERING, CHEMICAL
Grain growth
Hot Rolling
Ingot casting
Martensitic transformations
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Oxidation
Phase transitions
Reduction
Shape memory alloys
Superelasticity
Thermomechanical properties
Thermomechanical treatment
Transformation temperature
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Summary:Shape memory alloys are generally produced by casting processes and are subsequently homogenized. However, to obtain semifinished products on an industrial scale, the ingots from the casting process must be hot worked. In particular, final bar and sheet products can be obtained by hot rolling process. During intense hot work, surface oxidation of the material and microstructural changes may cause modifications to its original thermomechanical properties. In this sense, the present work aimed to study the correlation of the superelastic behavior in a Cu-Al-Be-Cr alloy before and after subjecting it to the hot rolling thermomechanical process. Abnormal grain growth was observed for a hot rolled sample with 30% reduction in initial alloy thickness. This abnormal growth in relation to non-rolled alloy caused an increase in phase transformation temperatures, a reduction in residual strain, a reduction in induction stress and an increase in alloy superelasticity.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-mr-2019-0542