A quantitative modeling of the unloading behavior of metals during a tensile test
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Se´bastien Allain
Abstract
This work proposes an original quantitative approach to understand the backward plastic strain resulting from the unloading of a polycrystalline metal during an interrupted tensile test. Based on a prior model by Salama and Roberts, the main assumption is that the relaxed plastic strain is due to the small relaxation of mobile dislocation loops, also responsible for the internal stresses. During unloading, the number of dislocation loops per active source remains constant, but they move backwards as the applied stress decreases. Thus, the main challenge consists in the quantitative estimation of each hardening component and their variations, upon loading and during the unloading sequences, without reverse straining. The model is applied in the case of an interstitial-free steel, with excellent agreement. This study provides a more consistent framework related to the evaluation of the Bauschinger effects in metals avoiding the ambiguity on the choice of the plastic strain offset.
References
[1] N.Brown, in: C.J.MacMahonJr. (Ed.), Microplasticity, Interscience Publishers, New York (1961) 45.Search in Google Scholar
[2] R.M.Cleveland, A.K.Ghosh: Int. J. Plast.18 (2002) 769.10.1016/S0749-6419(01)00054-7Search in Google Scholar
[3] H.Mori, H.Fujita: J. Phys. Soc. Jap.38 (1975) 1348.Search in Google Scholar
[4] X.Feaugas: Acta Mater.47 (1999) 3617.10.1016/S1359-6454(99)00222-0Search in Google Scholar
[5] H.Y.Yu: Mater. Des.30 (2009) 846.10.1016/j.matdes.2008.05.064Search in Google Scholar
[6] K.Salama, J.M.Roberts: Scripta Met.4 (1970) 749.10.1016/0036-9748(70)90054-2Search in Google Scholar
[7] O.Bouaziz, A.Aouafi, S.Allain: Mater. Sci. For.584–586 (2008) 605.10.4028/www.scientific.net/MSF.584-586.605Search in Google Scholar
[8] C.W.Sinclair, W.J.Poole, Y.Bréchet: Scripta Mat.55 (2006) 739.10.1016/j.scriptamat.2006.05.018Search in Google Scholar
[9] M.Yang, Y.Akiyama, T.J.Sasaki: Mater. Proc. Tech.151 (2004) 232.10.1016/j.jmatprotec.2004.04.114Search in Google Scholar
[10] C.Déprés, M.Fivel, L.Tabourot: Scripta Mat.58 (2008) 1086.10.1016/j.scriptamat.2008.02.027Search in Google Scholar
[11] N.Ibrahim, J.D.Embury: Mater. Sci. Eng.19 (1975) 147.10.1016/0025-5416(75)90018-XSearch in Google Scholar
[12] J.H.Schmitt: Thesis.Search in Google Scholar
[13] S.Thuillier, P.Y.Manach: Int. J. Plast.25 (2009) 733.10.1016/j.ijplas.2008.07.002Search in Google Scholar
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- Basic
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