Abstract
A comprehensive study on the large deformation responses of Equal Channel Angular Pressing (ECAP) processed AA6082 over wide ranges of strain rates (10(-4) <= (epsilon) over dot <= 5 x 10(3) s(-1)) and temperatures (294 <= T <= 473 K) are presented. The circular billets of as-received AA6082 was solution treated prior to over aging. The over aged billets were then ECAP processed at room temperature to 4 and 6 passes using route C. The Vickers micro hardness measurements indicated a gradual increase in the hardness values with number of ECAP passes. A significant increase in the yield strength with number of passes has also been observed. The observed compression experimental responses were modeled using the modified form of Johnson-Cook (JC) constitutive model. The correlations and predictions from the model are close to the observed experimental responses. (C) 2014 Elsevier Ltd. All rights reserved.