Fig. 2From: Prediction of ductile fracture initiation for powder metallurgical aluminum-copper preforms using FEMFriction calibration curve for P/M a Al preforms, b Al-2Â wt.% Cu preforms, c Al-4Â wt.% Cu preforms, and d Al-6Â wt.% Cu preforms with 90Â % initial relative densityBack to article page