Fabrication of aluminum borate whisker reinforced AZ91D magnesium alloy composites by semi-solid process and their mechanical properties

Makoto Yoshida, Shingo Takeuchi, Jin Pan, Gen Sasaki, Nobuyuki Fuyama, Toshio Fujii, Hideharu Fukunaga

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In order to develop a light weight piston for an automobile engine, aluminum borate whisker reinforced AZ91D magnesium alloy composites were fabricated by a semi-solid material process using squeeze casting. By controlling the solid fraction, fs, and the rate of the infiltration into the preform, we succeeded in reinforcing a part of the cast alloy without deformation of the preform. The tensile strength of the alloy/composites interface fabricated by semi-solid (50% fs, solid fraction in the semi-solid slurry) process was 120 MPa, and it was equal to the strength by conventional 0% fs process. However, the flexural strength of the composite by the 50% fs process was about 10% lower than the strength of that from the 0% fs process, 498 MPa. After solid solution and aging treatment, the bending strength of the composites in both 0% and 50% fs process was decreased. This might be caused by the notch effect of Mg2Si compound produced between SiO2 binder of the preform and magnesium during heat treatment.

Original languageEnglish
Pages (from-to)255-263
Number of pages9
JournalAdvanced Composite Materials: The Official Journal of the Japan Society of Composite Materials
Volume10
Issue number2-3
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes

Keywords

  • Metal matrix composites
  • Semi-solid
  • Squeeze casting

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering

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