Preparation and evaluation of stress-elastic and plastic strain diagrams of sintered steels

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

研究成果: Article

抄録

The differences in Young's moduli (E) and Poisson's ratios (v), calculated by the stress-strain diagrams from tensile testing (TT) and the sound velocities from an acoustic pulse method (APM), of sintered steels were compared. The values of E TT and V TT were smaller than those of E APM and V APM, respectively, because not only the elastic strain, but also the plastic strain are included in the stress-strain diagram of the sintered steels. Furthermore, by using the longitudinal and transverse elastic strains calculated from the values of E APM and V APM, the longitudinal and transverse plastic strains were separated from the stress-longitudinal and transverse strain diagrams. Consequently, the elastic limit or 0.2% yield strength was simply defined from the stress-longitudinal plastic strain diagram, in the case of the sintered steels which does not show a linearity of stress-strain diagram at the lower stresses. The differences in the elastic and plastic strains versus stress of each sample were explained on the basis of the pore characteristics, such as size, shape, and interconnection, and microstructures.

元の言語English
ページ(範囲)31-35
ページ数5
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
53
発行部数1
DOI
出版物ステータスPublished - 2006 1
外部発表Yes

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Steel
Plastic deformation
Acoustics
Tensile testing
Acoustic wave velocity
Poisson ratio
Yield stress
Elastic moduli
Microstructure

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

これを引用

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abstract = "The differences in Young's moduli (E) and Poisson's ratios (v), calculated by the stress-strain diagrams from tensile testing (TT) and the sound velocities from an acoustic pulse method (APM), of sintered steels were compared. The values of E TT and V TT were smaller than those of E APM and V APM, respectively, because not only the elastic strain, but also the plastic strain are included in the stress-strain diagram of the sintered steels. Furthermore, by using the longitudinal and transverse elastic strains calculated from the values of E APM and V APM, the longitudinal and transverse plastic strains were separated from the stress-longitudinal and transverse strain diagrams. Consequently, the elastic limit or 0.2{\%} yield strength was simply defined from the stress-longitudinal plastic strain diagram, in the case of the sintered steels which does not show a linearity of stress-strain diagram at the lower stresses. The differences in the elastic and plastic strains versus stress of each sample were explained on the basis of the pore characteristics, such as size, shape, and interconnection, and microstructures.",
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T1 - Preparation and evaluation of stress-elastic and plastic strain diagrams of sintered steels

AU - Hirose, Norimitsu

AU - Tanaka, Shin Ichi

AU - Fujiki, Akira

AU - Asami, Junichi

PY - 2006/1

Y1 - 2006/1

N2 - The differences in Young's moduli (E) and Poisson's ratios (v), calculated by the stress-strain diagrams from tensile testing (TT) and the sound velocities from an acoustic pulse method (APM), of sintered steels were compared. The values of E TT and V TT were smaller than those of E APM and V APM, respectively, because not only the elastic strain, but also the plastic strain are included in the stress-strain diagram of the sintered steels. Furthermore, by using the longitudinal and transverse elastic strains calculated from the values of E APM and V APM, the longitudinal and transverse plastic strains were separated from the stress-longitudinal and transverse strain diagrams. Consequently, the elastic limit or 0.2% yield strength was simply defined from the stress-longitudinal plastic strain diagram, in the case of the sintered steels which does not show a linearity of stress-strain diagram at the lower stresses. The differences in the elastic and plastic strains versus stress of each sample were explained on the basis of the pore characteristics, such as size, shape, and interconnection, and microstructures.

AB - The differences in Young's moduli (E) and Poisson's ratios (v), calculated by the stress-strain diagrams from tensile testing (TT) and the sound velocities from an acoustic pulse method (APM), of sintered steels were compared. The values of E TT and V TT were smaller than those of E APM and V APM, respectively, because not only the elastic strain, but also the plastic strain are included in the stress-strain diagram of the sintered steels. Furthermore, by using the longitudinal and transverse elastic strains calculated from the values of E APM and V APM, the longitudinal and transverse plastic strains were separated from the stress-longitudinal and transverse strain diagrams. Consequently, the elastic limit or 0.2% yield strength was simply defined from the stress-longitudinal plastic strain diagram, in the case of the sintered steels which does not show a linearity of stress-strain diagram at the lower stresses. The differences in the elastic and plastic strains versus stress of each sample were explained on the basis of the pore characteristics, such as size, shape, and interconnection, and microstructures.

KW - Plastic strain

KW - Poisson's ratio

KW - Stress-strain diagram

KW - Young's modulus

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