Modeling of mechanical behavior of ultra fine grained aluminum produced by multiple compressions in a channel die

Abstract

Mechanical behavior of AA1100 aluminum alloy processed by multiple compressions in a channel die<br><br>was modeled on the basis of a generalized three-dimensional dislocation-density-based two-phase composite<br><br>model. The simulated yield stress values were compared with the experimental data obtained by<br><br>the multiple compressions in a channel die after several passes. A good agreement was found between<br><br>the experimental and simulated yield stress values. The results showed that the yield stress of the ultra<br><br>fine grained materials, produced by multiple compressions in a channel die, can reasonably be simulated<br><br>using a dislocation-density-based two-phase model. Moreover, the experimentally determined average<br><br>grain size of the studied material correlates well with that predicted by the model. Therefore, it can be<br><br>said that the dislocation-based model could be used to predict the average grain size of the multiple compressed<br><br>materials in a channel die.