Constitutive Analyses of Tensile Tests on Pre-Rolled AA3003 Sheets

Abstract:

A new rationale to assess the work-hardening locus for pre-rolled sheets is described based on the realization that since the internal stresses necessarily sum to zero, the mean dislocation density remains the same upon re-pull in the rolling direction. Thus the 0.2 % yield stress as function of thickness strains results in an estimate of the stress-strain relation during rolling. Under plane strain, the thickness strain is negative to that of extension and hence the deduced rolling locus is compared to that of extrapolated tensile one of the start sheet. This comparison indicates that the onset of Stage IV occurs when volume fraction of point defects produced attains about 2 %.

• Periodical: Materials Science Forum (Volumes 794-796)
• Pages: 710-715
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.794-796.710
• Online since: June 2014
• Authors: Shigeo Saimoto*, Kaan Inal, Hai Ou Jin
• Keywords: Aluminium Alloy, Constitutive Relations, Dislocation Density, Internal Stress

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