Relations of porosity to Young's modulus and tensile strength and correlations between those mechanical properties of sintered steels

Norimitsu Hirose, Shin Ichi Tanaka, Akira Fujiki, Junichi Asami

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Abstract

Young's modulus (E) and tensile strength (S) of sintered steels depend mainly on porosity (P). The relations of P to E and S are described as E = (E0 - Esub)exp(- bE · P) + E sub and S = (S0 - Ssub) exp(- bs · P)+Ssub, respectively, Where E0 and S0 mean the mechanical properties at P=0, Esub, bE, S sub, and bs are experimental constants. The E sub and bE are affected by pore characteristic, such as pore shape, size, and interconnection, and S0, Ssub, and bs depend on not only the pore characteristic but also metal matrix structure. The fitting curves of shear modulus and 0.2% proof stress used by the above relation of P also correspond to the measured values of them, respectively. And then, Poisson's ratio calculated by the above relatons of Young's and shear moduli correspond to the measured value in comparison with Poisson's ratio calculated by the fitting equation, the type of E = E 0 exp(- bE · P), of each modulus. Furthermore, the relationship between ln(S - Ssub) and ln(E - Esub) of sintered steels shows the positive linear correlation.

Original languageEnglish
Pages (from-to)895-900
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume72
Issue number6
Publication statusPublished - 2006 Jun 1

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Keywords

  • Elasticity
  • Material Testing
  • Porosity
  • Sintered Material
  • Tensile Strength
  • Young's Modulus

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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