Densification of mixed metal powder at high temperature

Densification behaviors of mixed metal powder under high temperature were i nvestigated. Experimental data of mixed copper and tool steel powder with v arious volume fractions of Cu powder were obtained under hot isostatic pres sing and hot pressing. By mixing the creep potentials of McMeeking and co-w orkers and of Abouaf and co-workers originally for pure powder, the mixed c reep potentials with various volume fractions of Cu powder were employed in the constitutive models. The constitutive equations were implemented into a finite element program (ABAQUS) to compare with experimental data for den sification of mixed powder under hot isostatic pressing and hot pressing. F inite clement calculations by using the creep potentials of Abouaf and co-w orkers agreed reasonably well with experimental data, however, those by the model of McMeeking and co-workers underestimate experimental data as obser ved in the case of pure metal powders. (C) 2001 Elsevier Science Ltd. All r ights reserved.