THEORETICAL AND EXPERIMENTAL EVALUATION OF DISLOCATION DENSITY IN A WORKPIECE AFTER FORMING PROCESS

The theoretical calculation of dislocation density in different regions of a deformedworkpiece of 99.99% pure copper has been carried out using different procedures consisting offinite element method (fem) and hardness measurement. to assess the validity of the resultspertaining to these procedures, the dislocation density is experimentally measured utilizing thedifferential scanning calorimetry (dsc). comparing the predicted and experimental results, itwas found that the average error in prediction of the dislocation density by the hardnessmeasurement and fem is 12% and 2.5%, respectively. also, for further confirmation of theevaluated dislocation density ofeach region ofthe deformed workpiece, the annealing process wascarried out and in the region ofhigher dislocation density, a finer grain size was observed.