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Modeling of dislocation density and strength on rheoforged A356 alloy during multi-directional forging
, Article Computational Materials Science ; Vol. 81 , 2014 , pp. 284-289 ; Saei, M ; Kazeminezhad, M ; Dodangeh, A ; Sharif University of Technology
Abstract
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