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

研究成果: Article

抜粋

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.

元の言語English
ページ(範囲)895-900
ページ数6
ジャーナルNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
72
発行部数6
DOI
出版物ステータスPublished - 2006 6
外部発表Yes

ASJC Scopus subject areas

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

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