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     Research Journal of Applied Sciences, Engineering and Technology


Evaluation of Residual Stresses in a Rolled Sheet of AA 6082-T6 Aluminium Alloy

1F.V. Diaz, 1F.N. Rosso, 1A.C. Walker, 1C.A. Mammana and 2A.P.M. Guidobono
1Departamento de Ingenieria Electromecanica, Universidad Tecnologica Nacional (FRRa), Acuna 49, 2300 Rafaela, Argentina
2Division Metrologia Dimensional, Instituto Nacional de Tecnologia Industrial, Centro Regional Rosario, Ocampo y Esmeralda, 2000 Rosario, Argentina
Research Journal of Applied Sciences, Engineering and Technology  2019  2:67-72
http://dx.doi.org/10.19026/rjaset.16.6001  |  © The Author(s) 2019
Received: October 24, 2018  |  Accepted: November 26, 2018  |  Published: March 15, 2019

Abstract

This study aims to determine and evaluate residual stress components and anisotropy degrees in specimens of a rolled sheet of AA 6082-T6 aluminium alloy. The residual displacements were measured, using an optimised micro-indentation method, with an absolute error down to ±200 nm. A distribution of 8 micro-indents allowed to measure the residual displacements in 5 centroids of several geometric figures associated with that distribution. The results reveal that the normal components are compressive and much higher than the tangential components. The principal directions associated with each centroid were very close to the rolling direction. From the graphical tool called Mohr's circle, it was possible to detect a smooth variation associated with the residual stress state in the rolling direction. Finally, both the residual stress states and anisotropy degrees, evaluated along the rolling direction, would respond to a function which would be similar to the planar rotation function corresponding to the normal and tangential components.

Keywords:

Aluminium alloy, anisotropy degree, micro-indent method, Mohr's circle, residual stresses,


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Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.

ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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