Criteria of solidification cracking of Al-Mg and Al-Si alloys by acoustic emission method

Akira Matsushita, Itaru Endo, Makoto Yoshida

    Research output: Contribution to journalArticle

    Abstract

    Detection of solidification cracking of JIS AC7A aluminum alloy and Al-7%Si alloy was attempted by using acoustic emission method. In order to detect AE of solidification cracking, we investigated about AE signals of gas porosity, shrinkage cavity, and fracture in the semi-solid tensile test. The frequency bands of these casting defects were 150 kHz or less, so the source characterization of AE signals were difficult by that. Therefore we discussed and suggested value of integrated AE peak volt as an indicator of crack initiation. As a result, we proved value of time integral (IAP) is beneficial for eutectic alloy and value of temperature integral (TIAP) is beneficial for noneutectic alloy. We also suggested value of time temperature integral (DIAP) as the criterion of crack initiation which is beneficial for eutectic and non-eutectic alloy.

    Original languageEnglish
    Pages (from-to)104-108
    Number of pages5
    JournalKeikinzoku/Journal of Japan Institute of Light Metals
    Volume62
    Issue number3
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Acoustic emissions
    Solidification
    Crack initiation
    Eutectics
    Frequency bands
    Aluminum alloys
    Casting
    Porosity
    Gases
    Temperature
    Defects

    Keywords

    • Acoustic emission
    • Aluminum
    • Direct chill casting
    • Hot tearing
    • Solidification cracking

    ASJC Scopus subject areas

    • Materials Chemistry
    • Metals and Alloys
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    Criteria of solidification cracking of Al-Mg and Al-Si alloys by acoustic emission method. / Matsushita, Akira; Endo, Itaru; Yoshida, Makoto.

    In: Keikinzoku/Journal of Japan Institute of Light Metals, Vol. 62, No. 3, 2012, p. 104-108.

    Research output: Contribution to journalArticle

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