Effects of Sb, Sr, and Bi on the material properties of cast Al-Si-Cu alloys produced through heated mold continuous casting

Mitsuhiro Okayasu, Shuhei Takeuchi, Shaohua Wu, Toshihiro Ochi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Rare earth metals can create a fine eutectic Si structure in cast Al-Si10.6-Cu2.5 (ADC12) alloys produced through heated mold continuous casting. Fine and spherical eutectic Si phases are created in the ADC12 alloys through the addition of Sr0.04, and fine lamellar eutectic Si phases are created through Sb and Bi addition. Crystal orientation on the face perpendicular to the casting direction is formed by [110]; however, this uniform formation is collapsed in the ADC12 alloy with an increasing amount of Sr addition, such as Sr > 0.04%. The shape of the eutectic Si is statically analyzed, and the effects of the eutectic Si characteristics on the mechanical properties are examined experimentally. On the one hand, the mechanical properties of the ADC12-Sr alloy increase with increasing Sr content because of the fine eutectic Si, the randomly orientated crystal formation, and so on. On the other hand, the material ductility increases in the ADC12 alloy with increasing addition of Sb and Bi elements. A high fracture strain of approximately 14% is obtained for the ADC12-Bi1.5 alloy.

Original languageEnglish
Pages (from-to)1139-1147
Number of pages9
JournalJournal of Mechanical Science and Technology
Volume30
Issue number3
DOIs
Publication statusPublished - Mar 1 2016

Keywords

  • Cast Al alloy
  • Eutectic Si phase
  • Material property
  • Rare earth metal

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

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