### 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 = (E_{0} - E_{sub})exp(- b_{E} · P) + E _{sub} and S = (S_{0} - S_{sub}) exp(- b_{s} · P)+S_{sub}, respectively, Where E_{0} and S_{0} 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 S_{0}, 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 |

Publication status | Published - 2006 Jun |

Externally published | Yes |

### Fingerprint

### Keywords

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

### ASJC Scopus subject areas

- Mechanical Engineering

### Cite this

*Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A*,

*72*(6), 895-900.

**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.

Research output: Contribution to journal › Article

*Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A*, vol. 72, no. 6, pp. 895-900.

}

TY - JOUR

T1 - Relations of porosity to Young's modulus and tensile strength and correlations between those mechanical properties of sintered steels

AU - Hirose, Norimitsu

AU - Tanaka, Shin Ichi

AU - Fujiki, Akira

AU - Asami, Junichi

PY - 2006/6

Y1 - 2006/6

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

KW - Porosity

KW - Sintered Material

KW - Tensile Strength

KW - Young's Modulus

UR - http://www.scopus.com/inward/record.url?scp=33748335417&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748335417&partnerID=8YFLogxK

M3 - Article

VL - 72

SP - 895

EP - 900

JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

SN - 0387-5008

IS - 6

ER -