Experimental characterization and elasto-plastic modeling of the quasi-static mechanical response of TA-6 V at room temperature

Abstract

The paper presents an experimental study of the quasi-static deformation behavior of a TA-6 V in sheet form. To quantify the plastic anisotropy and the tension-compression asymmetry of this material at room temperature, monotonic tensile and compressive tests were carried out on specimens cut out along several orientations in the plane of the sheet. It was observed that although the tensile flow stress anisotropy is very mild, the Lankford coefficients' anisotropy is very pronounced. To describe the observed mechanical response an elastic/plastic approach was used. Yielding was described using a family of yield criteria that account for strength differential effects and allow an improved description of the anisotropy and its evolution through multiple linear transformations. Comparisons between uniaxial monotonic data and FE simulations using the model show a very good agreement. (C) 2011 Elsevier Ltd. All rights reserved.