Effect of grain refiner and grain size on the susceptibility of Al-Mg die casting alloy to cracking during solidification

Ryosuke Kimura, Haruaki Hatayama, Kenji Shinozaki, Izumi Murashima, Jo Asada, Makoto Yoshida*

*この研究の対応する著者

研究成果: Article査読

39 被引用数 (Scopus)

抄録

The die casting process and its alloys have been developed in recent years for automobile body parts such as B-pillars. However, it is known that die casting alloys with high ductility and fracture elongation often show a higher susceptibility to cracking during solidification than conventional Al-Si alloys. Thus, it is important to estimate and control the susceptibility to cracking during solidification before trial casting or mass-production. In this study, as a representative non-heat treatment type alloy, Al-4.5wt%Mg (JIS AC7A, AA 514) aluminum alloy was used. The effect of the addition of silicon and grain refiner on the reduction of the susceptibility to cracking was examined. In order to evaluate the susceptibility to cracking, both the "I-beam casting cracking test" and the "TIG spot welding cracking test" were carried out. As a result, the addition of Ti + B worked as a grain refiner on both testing methods. The susceptibility to cracking was significantly reduced by the addition of Ti + B in both the I-beam casting and the weld crater. It was found that the finer grain size led to lower susceptibility to cracking. Furthermore, the susceptibility to cracking of the die casting product decreased with the addition of Ti + B.

本文言語English
ページ(範囲)210-219
ページ数10
ジャーナルJournal of Materials Processing Technology
209
1
DOI
出版ステータスPublished - 2009 1 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • コンピュータ サイエンスの応用
  • 金属および合金
  • 産業および生産工学

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