Mechanical properties determination of dual-phase steels using uniaxial tensile and hydraulic bulge test
authors Amaral, R; Santos, AD; Lopes, AB
nationality International
journal CIENCIA & TECNOLOGIA DOS MATERIAIS
author keywords Sheet metal forming; dual-phase steels; flow curve; biaxial hydraulic bulge; yield locus
keywords SHEET METALS; STRESS
abstract Numerical simulations of sheet metal forming processes need the establishment of highly reliable results, which in turn need the accurate identification of mechanical properties. In this paper a study is presented on the choice of the characterization function of flow stress-strain curve of sheet metal materials, as well as the selection of the best yield locus, based on experimental uniaxial tensile and biaxial hydraulic bulge tests performed on dual-phase steels of industrial interest. To obtain a better characterization of the hardening curve, a combination is made using the uniaxial tensile test data with biaxial hydraulic bulge test results, since bulge test covers a larger range of plastic strain when compared to tensile test. Since the two flow curves have different strain paths, they can't be directly compared or combined. Therefore, it is necessary a transformation of flow stress-strain curve provided from biaxial bulge test into equivalent stress-strain curve. Different methodologies were applied to transform biaxial stress-strain curve to an equivalent one and the different results are compared and evaluated. (C) 2017 Portuguese Society of Materials (SPM). Published by Elsevier Espana, S.L.U. All rights reserved.
publisher ELSEVIER ESPANA S I
issn 0870-8312
year published 2017
volume 29
issue 1
beginning page E239
ending page E243
digital object identifier (doi) 10.1016/j.ctmat.2016.06.007
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000412098700046

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