A. Karimi Taheri, Kazeminezhad, A. Kiet Tieu,
Volume 4, Issue 1 (6-2007)
Abstract
Abstract: The theoretical calculation of dislocation density in different regions of a deformed
workpiece of 99.99% pure copper has been carried out using different procedures consisting of
Finite Element Method (FEM) and hardness measurement. To assess the validity of the results
pertaining to these procedures, the dislocation density is experimentally measured utilizing the
Differential Scanning Calorimetry (DSC). Comparing the predicted and experimental results, it
was found that the average error in prediction of the dislocation density by the hardness
measurement and FEM is 12% and 2.5%, respectively. Also, for further confirmation of the
evaluated dislocation density of each region of the deformed workpiece, the annealing process was
carried out and in the region of higher dislocation density, a finer grain size was observed.
