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

    Research output: Contribution to journalArticle

    33 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)210-219
    Number of pages10
    JournalJournal of Materials Processing Technology
    Volume209
    Issue number1
    DOIs
    Publication statusPublished - 2009 Jan 1

    Fingerprint

    Die casting
    Grain Size
    Cracking
    Solidification
    Casting
    Susceptibility
    Die
    Automobile bodies
    Spot welding
    Silicon
    Ductility
    Elongation
    Aluminum alloys
    Welds
    Testing
    Aluminum Alloy
    Automobile
    Welding
    Evaluate

    Keywords

    • Al-Mg alloy
    • Die casting
    • Grain refinement
    • Solidification cracking

    ASJC Scopus subject areas

    • Computer Science Applications
    • Modelling and Simulation
    • Ceramics and Composites
    • Metals and Alloys
    • Industrial and Manufacturing Engineering

    Cite this

    Effect of grain refiner and grain size on the susceptibility of Al-Mg die casting alloy to cracking during solidification. / Kimura, Ryosuke; Hatayama, Haruaki; Shinozaki, Kenji; Murashima, Izumi; Asada, Jo; Yoshida, Makoto.

    In: Journal of Materials Processing Technology, Vol. 209, No. 1, 01.01.2009, p. 210-219.

    Research output: Contribution to journalArticle

    Kimura, Ryosuke ; Hatayama, Haruaki ; Shinozaki, Kenji ; Murashima, Izumi ; Asada, Jo ; Yoshida, Makoto. / Effect of grain refiner and grain size on the susceptibility of Al-Mg die casting alloy to cracking during solidification. In: Journal of Materials Processing Technology. 2009 ; Vol. 209, No. 1. pp. 210-219.
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