Sensitivity and uncertainty analysis of microstructure—property relationships for compacted powder metals

摘要

In an earlier study, the authors presented a characterisation of the FC-0205 Ancorsteel powderscontaining 0.6 and 1.0% Acrawax to define the evolution of the failure line and cap surface of themodified Drucker/Prager cap model during compaction. Using the results of that study (i.e. FC-0205 material parameters), this paper presents sensitivity and uncertainty analysis of themicrostructure-property relationships for powder metallurgy compaction. It is found for all of theresponses of interest (the compressibility curve, the interparticle friction, the material cohesion,the cap eccentricity and the elastic modulus) that the most dominant parameter is the initial (ortap) density. It is also observed that the uncertainty in output parameters for the case of 1% wax ismuch larger than those forthe case of 0.6% wax, due to the large uncertainty in the failure stress(in particular, the compressive failure stress).