The flow stress anisotropy of rolled sheets of Al, Cu and interstitial-free steel was investigated by tensile testing. Strong anisotropy, i.e., larger than expected from the texture, was induced by the dislocation structure in Al and IF steel increasing with the rolling pre-strain while no such effect was found in Cu. Taking into account the different spacings, misorientations and crystallographic alignment of the dislocation boundaries as well as the texture induced by rolling in the 3 metals, the anisotropy was modelled as arising from the resistance to slip offered by parallel dislocation boundaries. Good agreement between prediction and experiment also concerning the absolute flow stress values was found for all three metals. The best agreement was found for Al, where the dislocation structure was most thoroughly characterized.

Anisotropy in Rolled Metals Induced by Dislocation Structure. Z.J.Li, G.Winther, N.Hansen: Acta Materialia, 2006, 54[2], 401-10