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Modeling of dislocation density and strength on rheoforged A356 alloy during multi-directional forging

Kavosi, J ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.commatsci.2013.08.029
  3. Abstract:
  4. In this study, a hybrid model is presented to predict the dislocation density and strength evolution of the rheoforged non-dendritic A356 alloy during multi-directional forging. Regarding the characteristics of non-dendritic A356 alloy, combination of Shear Lag and Nes models is used for the eutectic structure, and Nes model is used for the α-Al globular phase. The aspect ratio variations of Si particles in eutectic structure during 3 passes of multi-directional forging do not change the model predictions, significantly. Model predictions on shear stress are in good agreement with experimental results of shear punch test
  5. Keywords:
  6. Dislocation density ; Multi-directional forging ; Nes model ; Dislocation densities ; Eutectic structures ; Globular phase ; Model prediction ; Shear-lag model ; Shear-punch tests ; Strength ; Alloys ; Aspect ratio ; Eutectics ; Forecasting ; Forging
  7. Source: Computational Materials Science ; Vol. 81 , 2014 , pp. 284-289
  8. URL: http://www.sciencedirect.com/science/article/pii/S0927025613004825