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On the evolution of flow stress during constrained groove pressing of pure copper sheet

Hosseini, E ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.commatsci.2008.12.004
  3. Publisher: 2009
  4. Abstract:
  5. Using a mechanical model and dislocation density based model, the evolutions of dislocation density and flow stress of pure copper during constrained groove pressing (CGP) process are investigated. In this regard, the strain and strain rate are achieved from the mechanical model and then input into the dislocation model. To verify the predicted flow stress, the process of constrained groove pressing is performed on the sheets of pure copper from one to three passes. The predicted flow stresses are compared with the experimental data and a good agreement is observed. Also, it is found that during the straining of the copper sheet in CGP process, the dislocation density and strength dropping occur in lower strain than that in other severe plastic deformation processes. © 2008 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Constrained groove pressing (CGP) ; Copper sheets ; Dislocation density ; Dislocation models ; Experimental datum ; Flow stress ; Mechanical models ; Modeling ; Pure coppers ; Severe plastic deformations ; Three pass ; Copper ; Plastic flow ; Strain rate ; Stresses ; Aluminum sheet
  8. Source: Computational Materials Science ; Volume 45, Issue 4 , 2009 , Pages 855-859 ; 09270256 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S092702560800520X