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.

• Periodical: Materials Science Forum (Volumes 534-536)
• Pages: 749-752
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.534-536.749
• Online since: January 2007
• Authors: Norimitsu Hirose, Kazuya Oouchi, Akira Fujiki, Junichi Asami
• Keywords: Diffusion Bonded Powder, P/M Machine Part, Poisson's Ratio, Pre-Alloyed Powders, Young's Modulus

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