Intermetallic compound produced by semi-solid processing from Al/Ni powder mixture and its mechanical strength at elevated temperature

Eiji Yuasa, Kensuke Morita, Katsuyoshi Kondoh, Tatsuhiko Aizawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

To produce Al-Ni intermetallic compound, Al-42mass%Ni powder mixture was formed by back-forward extrusion at the temperature near to melting point of aluminum. The structure of alloy extruded at 910 K consists of Al3Ni, Al3Ni2 and eutectic structure. In the alloy extruded at 1010 K, it consists of the intermetallic compound Al3Ni and Al3Ni2. The volume fraction of each phase in the structure changes by the heat treatment, that is, the Al3Ni phase increases with increase of heat-treating temperature and the eutectic structure disappears. High temperature deformation behaviors of these alloys were characterized by compressive test at various temperatures. The alloy of intermetallic compound containing the eutectic structure have large ductility, the eutectic structure transforms to Al3Ni phase during the high temperature deformation and this transformation similarly occurs by the heat treatment at eutectic temperature. It was recognized that the compressive yield stresses in Al3Ni and Al3Ni2 phases became higher with rising deformation temperature, it is referred to as "anomalous strengthening behavior of intermetallic compound".

Original languageEnglish
Pages (from-to)1036-1041
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume49
Issue number11
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • Al-Ni alloy
  • High-temperature deformation
  • Intermetallic compound
  • Mechanical strength
  • Semi-solid processing

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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