Research Article | OPEN ACCESS
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
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,
References
-
Dean, J., G. Aldrich-Smith and T.W. Clyne, 2011. Use of nanoindentation to measure residual stresses in surface layers. Acta Mater., 59(7): 2749-2761.
CrossRef Direct Link -
Díaz, F.V., R.E. Bolmaro, A.P.M. Guidobono and E.F. Girini, 2010. Determination of residual stresses in high speed milled aluminium alloys using a method of indent pairs. Exp. Mech., 50(2): 205-215.
CrossRef -
Díaz, F.V. and C.A. Mammana, 2012. Study of Residual Stresses in Conventional and High-speed Milling. In: Filipovic, L.A. (Ed.), Milling: Operations, Applications and Industrial Effects. Nova Science Publishers, Inc., New York, pp: 127-155.
-
Díaz, F.V., C. Mammana and A. Guidobono, 2012. Evaluation of residual stresses induced by high speed milling using an indentation method. Modern Mech. Eng., 2(4): 143-150.
CrossRef -
Díaz, F.V., C.A. Mammana and A.P.M. Guidobono, 2015. Evaluation of residual stresses in low, medium and high speed milling. Res. J. Appl. Sci. Eng. Technol., 11(3): 252-258.
CrossRef Direct Link -
Dotson, C.L., R. Harlow and R.L. Thompson, 2003. Fundamentals of Dimensional Metrology. 5th Edn., Thompson Delmar Learning, New York.
-
Gere, J.M., 2004. Mechanics of Materials. 5th Edn., Brooks/Cole, Pacific Grove, CA.
-
Lu, J., 1996. Handbook of Measurement of Residual Stresses. Fairmont Press Inc., Lilburn, GA.
-
Noyan, I.C. and J.B. Cohen, 1987. Residual Stress Measurement by Diffraction and Interpretation. Springer Verlag, Berlin.
-
Rendler, N.J. and I. Vigness, 1966. Hole-drilling strain-gage method of measuring residual stresses. Exp. Mech., 6(12): 577-586.
CrossRef -
Rowlands, R.E., 1987. Residual Stresses. In: Kobayashi, A. (Ed.), Handbook on Experimental Mechanics. Prentice-Hall, New Jersey, pp: 768-813.
-
Schwach, D.W. and Y.B. Guo, 2006. A fundamental study on the impact of surface integrity by hard turning on rolling contact fatigue. Int. J. Fatigue, 28(12): 1838-1844.
CrossRef -
Suresh, S. and A.E. Giannakopoulos, 1998. A new method for estimating residual stresses by instrumented sharp indentation. Acta Mater., 46(16): 5755-5767.
CrossRef -
Timoshenko, S.P. and J.N. Goodier, 1970. Theory of Elasticity. 3rd Edn. McGraw-Hill, New York.https://doi.org/10.1115/1.3408648
CrossRef -
Toribio, J., 1998. Residual stress effects in stress-corrosion cracking. J. Mater. Eng. Perform., 7(2): 173-182.
CrossRef -
Torres, M.A.S. and H.J.C. Voorwald, 2002. An evaluation of shot peening, residual stress and stress relaxation on the fatigue life of AISI 4340 steel. Int. J. Fatigue, 24(8): 877-886.
CrossRef -
Withers, P.J., 2007. Residual stress and its role in failure. Rep. Prog. Phys., 70(12): 2211-2264.https://doi.org/10.1088/0034-4885/70/12/R04
CrossRef -
Wyatt, J.E. and J.T. Berry, 2006. A new technique for the determination of superficial residual stresses associated with machining and other manufacturing processes. J. Mater. Proc. Tech., 171(1): 132-140.
CrossRef -
Wyatt, J.E. and J. Berry, 2009. Mapping of superficial residual stresses in machined components. J. Ind. Technol., 25(1): 1-8.
Direct Link -
Coules, H.E., G.C.M. Horne, K. Abburi Venkata and T. Pirling, 2018. The effects of residual stress on elastic-plastic fracture propagation and stability. Mat. Design, 143: 131-140.
CrossRef -
Gao, Y.K., M. Yao and J.K. Li, 2002. An analysis of residual stress fields caused by shot peening. Metall. Mater. Trans. A, 33: 1775-1778.
CrossRef -
Lee, Y.H. and D. Kwon, 2003. Measurement of residual-stress effect by nanoindentation on elastically strained (1 0 0) W. Scripta Mater., 49(5): 459-465.
CrossRef -
Niku-Lari, A., 1983. Influence of residual stresses introduced by shot peening upon the fatigue life of materials. Exp. Tech., 7(3): 21-25.
CrossRef -
Wang, S., Y. Li, M. Yao and R. Wang, 1998. Compressive residual stress introduced by shot peening. J. Mater. Proc. Tech., 73(1-3): 64-73.
CrossRef
Competing interests
The authors have no competing interests.
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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.
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