Poisson's ratio of sintered materials for structural machine parts

Hirose Norimitsu, Asami Junichi, Fujiki Akira, Oouchi Kazuya

Research output: Contribution to journalArticlepeer-review

Abstract

The relationships between Young's modulus, shear modulus and Poission's ratio of sintered materials and porosity were investigated for use as practical P/M machine parts. Three types of steel powders were prepared and then compacted, sintered, and heat-treated under various conditions. Porosity had the greatest influence on Young's modulus, shear modulus, and Poisson's ratio.Especially, Poisson's ratio was affected by the pore shape, which depended on the type of powder, sintering temperature and atmosphere, and heat treatment. For the more practical use of powder compositions, there was little influence by the sintering atmosphere on the Poisson's ratio of the sintered and heat-treated materials. For a partially alloyed powder (Fe-4mass% Ni-1.5mass% Cu-0.5mass% Mo)+0.8mass% C powder, Poisson's ratio versus porosity depended only on the sintering temperature at a porosity below 20%. In this case, a simpler approximate equation of Poisson's ratio of the sintered and heattreated specimen versus porosity was proposed as follows: v=0.300-0.266P+0.579P2 at 1423K(sintering temperature)or v=0.304-0.264P+0.548P2 at 1523K.

Original languageEnglish
Pages (from-to)226-232
Number of pages7
JournalFenmo Yejin Jishu/Powder Metallurgy Technology
Volume27
Issue number3
Publication statusPublished - 2009 Jun 1
Externally publishedYes

Keywords

  • P/M machine part
  • Poisson's ratio
  • Porosity
  • Shear modulus
  • Young's modulus

ASJC Scopus subject areas

  • Mechanics of Materials
  • Metals and Alloys

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