Paper Title:
Implementation of Twin Reorientation and Softening Schemes in a Polycrystal Plasticity Model for Mg Alloys
  Abstract

Uniaxial compression tests on hot-rolled AZ31 Mg alloy were carried out at a temperature of 300°C. In order to investigate work hardening and texture evolution during plastic deformation, cylindrical specimens were compressed to the rolling direction. Experimental investigation reveals that flow curves are strongly dependent on microstructure evolution such as deformation twinning and softening phenomenon. The occurrence of deformation twinning and softening phenomenon was revealed by the observation of microtexture using electron backscatter diffraction (EBSD). A visco-plastic self-consistent (VPSC) polycrystal model was used to simulate the work hardening, softening and texture evolution during the uniaxial compression. In order to calculate orientation of deformation twins, predominant twin reorientation (PTR) scheme was implemented into the polycrystal model. A softening scheme was also implemented in the polycrystal model to predict softening phenomenon and texture evolution after a peak stress.

  Info
Periodical
Materials Science Forum (Volumes 558-559)
Edited by
S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara
Pages
1063-1068
DOI
10.4028/www.scientific.net/MSF.558-559.1063
Citation
S. H. Choi, Y.S. Song, J. K. Kim, B.J. Jung, Y. B. Park, "Implementation of Twin Reorientation and Softening Schemes in a Polycrystal Plasticity Model for Mg Alloys", Materials Science Forum, Vols. 558-559, pp. 1063-1068, 2007
Online since
October 2007
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$32.00
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