Analysis of iron powder design for compaction process

Abstract

This paper aims at finding a relationship among the iron powder design parameters, the material properties, and the final properties. The iron powder design parameters were the composition of graphite, particle size, and the composition of lubricant. The material properties in Shima-Oyane constitutive model are alpha, beta, gamma, a, b, and n. The final properties of green bodies are green density, density deviation, effective stress, hydrostatic pressure, effective strain, and volumetric strain. The correlations between the powder design parameters and the material properties were obtained by compaction experiments with regression method. The correlations between the material properties and the final properties were obtained by the compaction simulation with regression method. The regression model which shows the correlations between the powder design parameters and the final properties with the fixed process conditions and geometry were developed. This regression model gives the generic information of the powder design. (C) 2014 Elsevier B.V. All rights reserved.