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Determination of flow stress under hot deformation conditions

Solhjoo, S ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.msea.2012.05.057
  3. Publisher: 2012
  4. Abstract:
  5. In order to predict the flow stress curves up to peak under the hot working conditions two crucially modified models are presented. The modification is done by considering the effects of both temperature and strain rate. Besides, the ability of prediction at very low strains is added to them. Furthermore a new mathematical model has been developed to estimate the stress-strain curves beyond the peak via a secant hyperbolic function. The predicted results are found to be in accord with empirical values
  6. Keywords:
  7. Hot deformation ; Constitutive modeling ; Deformation conditions ; Empirical values ; Flow stress curves ; Low strains ; Modified model ; New mathematical model ; Stress and strain ; Working conditions ; Strain ; Stress-strain curves ; Hot working
  8. Source: Materials Science and Engineering A ; Volume 552 , 2012 , Pages 566-568 ; 09215093 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0921509312007630