Mechanical properties of Al—Si and Al—Fe powder metallurgy alloys

Mitsuo Niinomi, Toshiro Kobayashi, Shinji Hakata

研究成果: Article査読

抄録

The relationship between mechanical properties and microstructure, and the mechanism of strengthening of Al—18 wt%Si and Al—8 wt%Fe alloys made by powder metallurgy process were investigate. Si particles are observed in the Al—18 wt% Si alloys, and Al3Fe and Al6Fe particles are observed as intermetallic compounds in the Al—8 wt%Fe alloys using an transmission electron microscopy. Work hardening mechanism of the alloys is summarized as follows: Firstly dislocation loops are formed around fine dispersion particles. Then, many dislocation such as like prismatic loops pile up as deformation progresses. Finally, stress concentration induced by dislocation loops is subjected to the plastic release. The strength of those alloys are related closely to both the volume fraction of particles and the particle size.

本文言語English
ページ(範囲)772-777
ページ数6
ジャーナルjournal of japan institute of light metals
41
11
DOI
出版ステータスPublished - 1991

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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