Study of Elastic Moduli of Sintered Low Alloy Steels by Acoustic Pulse Method

Abstract

The influence of porosity (P) on Young’s modulus (E) and Poisson’s ratio (υ) of sintered steels produced from four types of steel powders were investigated. The values of E and υ depends mainly on the value of P, and those were a little affected by alloying elements. The relationship between compacting pressure (CP) and P and the relationships between E, υ, and P were described as following equations: P = P1 + P2 exp(- CP / P3), E = E0 (1 - kEP)2, and υ = (υ0 - υsub)(1 - kυP)2 + υsub, where subscript 0 means P = 0, and P1 - 3, kE, kυ and υsub were empirical constants. It was clarified that if powder and sintering temperature is defined, the elastic moduli of sintered steel can be calculated as a function of compacting pressure.