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

doi:10.1299/kikaia.72.895

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

Research output: Contribution to journal › Article › peer-review

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 - E_sub)exp(- b_E · P) + E _sub and S = (S₀ - S_sub) exp(- b_s · P)+S_sub, respectively, Where E₀ and S₀ mean the mechanical properties at P=0, E_sub, b_E, S _sub, and b_s are experimental constants. The E _sub and b_E are affected by pore characteristic, such as pore shape, size, and interconnection, and S₀, S_sub, and b_s 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(- b_E · P), of each modulus. Furthermore, the relationship between ln(S - S_sub) and ln(E - E_sub) of sintered steels shows the positive linear correlation.

Original language	English
Pages (from-to)	895-900
Number of pages	6
Journal	Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	72
Issue number	6
DOIs	https://doi.org/10.1299/kikaia.72.895
Publication status	Published - 2006 Jun
Externally published	Yes

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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Relations of porosity to Young's modulus and tensile strength and correlations between those mechanical properties of sintered steels. / Hirose, Norimitsu; Tanaka, Shin Ichi; Fujiki, Akira; Asami, Junichi.

In: Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 72, No. 6, 06.2006, p. 895-900.

Research output: Contribution to journal › Article › peer-review

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

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.",

keywords = "Elasticity, Material Testing, Porosity, Sintered Material, Tensile Strength, Young's Modulus",

author = "Norimitsu Hirose and Tanaka, {Shin Ichi} and Akira Fujiki and Junichi Asami",

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AU - Hirose, Norimitsu

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AU - Fujiki, Akira

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PY - 2006/6

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N2 - 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.

AB - 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.

KW - Elasticity

KW - Material Testing

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KW - Sintered Material

KW - Tensile Strength

KW - Young's Modulus

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