Effect of a Special ECAP Die Configuration on Microhardness Distributions in Pure Aluminum
Experiments were conducted to evaluate the feasibility of using a new ECAP die configuration in which there are arcs of curvature at the intersection of the two channels at both the outer and inner points. The experiments used a configuration in which the radii of curvature were identical at both the outer and inner points since calculations suggest this corresponds to an optimum configuration. High-purity aluminum was pressed using this special die and hardness measurements were taken on cross-sectional planes after pressing. The results show the new die configuration leads to less homogeneity than with conventional ECAP dies.
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
Z. C. Duan and T. G. Langdon, "Effect of a Special ECAP Die Configuration on Microhardness Distributions in Pure Aluminum", Materials Science Forum, Vols. 667-669, pp. 69-74, 2011