Poisson's Ratio of Sintered Materials for Structural Machine Parts

Hirose, Norimitsu; Asami, Junichi; Fujiki, Akira; Oouchi, Kazuya

doi:10.2497/jjspm.51.515

Cited by 10 publications

(3 citation statements)

References 8 publications

(3 reference statements)

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“…17 After rolling, the porosity in the surface layer decreases, which results in the increase in both elastic modulus and the Poisson's ratio of the surface material. 18 With the real contact area decreasing, the friction coefficient of rolled material becomes lower. As the friction couples are in elastic–plastic contact, the friction coefficient decreases as load increases because of the non-linear relationship between the real contact area and the load.…”

Section: Resultsmentioning

confidence: 99%

Friction and wear behaviours of surface densified powder metallurgy Fe–2Cu–0.6C material

et al. 2016

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Surface rolling was employed to fabricate a densified layer on a powder metallurgy (PM) Fe-2Cu-0.6C piece. A densified surface layer with a depth of 335 μm and a surface hardness of 330 HV 0.1 was obtained, in which the lamellar spacing of pearlite and grain size of ferrite were refined. Friction and wear behaviours of the surface densified material were studied. Results indicated that friction coefficient of the rolled material decreased as the load increased, which was lower than that of the un-rolled material. Wear volumes were lower than that of the un-rolled material, which increased as the load increased. Wear loss was caused by flake spalling and grooves, and the wear mechanism mainly was abrasive wear. The surface densified layer with higher hardness and lower porosity can hinder the cracks initiation and propagation on the surface and under the surface, which enhance the wear resistance of the PM material.

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Section: Resultsmentioning

confidence: 99%

Friction and wear behaviours of surface densified powder metallurgy Fe–2Cu–0.6C material

et al. 2016

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“…The surface roughness of material decreases after rolling, which could reduce the friction coefficient [17,18]. The elastic modulus is increased [19] and surface hardness is improved. It could reduce the adhesion resistance and elastic plastic deformation in the rolling process, which also could result in a decrease in friction coefficient [20].…”

Section: Effect Of Load On the Tribological Behaviorsmentioning

confidence: 99%

Study on the rolling friction and wear properties of surface densified powder metallurgy Fe-2Cu-0.6C material

Liu

Zheng

Guo

et al. 2020

Surf. Topogr.: Metrol. Prop.

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Rolling friction and wear behaviours of a surface densified Fe-2Cu-0.6C powder metallurgy material were investigated. Results indicated that friction coefficient and wear were significantly decreased after rolling. Wear rate tended to be steady as the rolling cycle increases. Under light load, wear was caused by delamination and ploughing. Delamination crack initiated on material surface. Under heavy load, wear was caused by delamination and pits. Cracks initiated at the surface and subsurface. However, due to the hardened surface layer and a lower porosity, probability of subsurface crack initiation was reduced and crack locations were closer to surface. Crack propagation distance also was shortened. The surface densified layer plays an important role in improving the rolling wear resistance of the material.

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“…There are some reports of the Young's modulus of sintered steel [1,2] and few reports of both Young's modulus and Poisson's ratio of sintered steel. Both Young's modulus and Poisson's ratio are affected mainly by porosity, secondly by the kind of base iron powder or sintering temperature, but are shown to be independent of alloying element, heat treatment, and sintering atmosphere [3].…”

Section: Introductionmentioning

confidence: 98%

Study of Elastic Moduli of Sintered Low Alloy Steels by Acoustic Pulse Method

Hirose¹,

Oouchi

Fujiki

et al. 2007

MSF

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The influence of porosity (P) on Young’s modulus (E) and Poisson’s ratio (υ) of sintered steels produced from four types of steel powders were investigated. The values of E and υ depends mainly on the value of P, and those were a little affected by alloying elements. The relationship between compacting pressure (CP) and P and the relationships between E, υ, and P were described as following equations: P = P1 + P2 exp(- CP / P3), E = E0 (1 - kEP)2, and υ = (υ0 - υsub)(1 - kυP)2 + υsub, where subscript 0 means P = 0, and P1 - 3, kE, kυ and υsub were empirical constants. It was clarified that if powder and sintering temperature is defined, the elastic moduli of sintered steel can be calculated as a function of compacting pressure.

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Poisson's Ratio of Sintered Materials for Structural Machine Parts

Cited by 10 publications

References 8 publications

Friction and wear behaviours of surface densified powder metallurgy Fe–2Cu–0.6C material

Friction and wear behaviours of surface densified powder metallurgy Fe–2Cu–0.6C material

Study on the rolling friction and wear properties of surface densified powder metallurgy Fe-2Cu-0.6C material

Study of Elastic Moduli of Sintered Low Alloy Steels by Acoustic Pulse Method

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