Detection of solidification cracking of Al-7mass%Si alloy by using acoustic emission and visualization methods

Itaru Endo, Hiroyuki Chiba, Toru Ueki, Takanari Toriyama, Makoto Yoshida

Research output: Contribution to journalArticle

Abstract

Detection of AE signals of solidification cracking of Al-7mass%Si alloy was attempted with in situ microscopic observation on the surface of casting using high speed camera. During solidification, it was found that AE signal from the casting with crack was higher than AE signal from the casting without crack. As a result of observation of casting using high speed camera, it was found that a rise of AE signal corresponded to initiation of solidification cracking. This stage was the stage of eutectic solidification. Thus, AE signals of solidification cracking should be generated during eutectic solidification. However, AE signals from the casting without cracking were also detected during solidification. This means that AE signals other than solidification cracking should be generated during solidification. Therefore, AE signals detected during eutectic solidification is not necessarily AE signals of solidification cracking. In order to detect AE signals of solidification cracking, it is necessary to separate AE signals of solidification cracking and other than solidification cracking.

Original languageEnglish
Pages (from-to)486-491
Number of pages6
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume60
Issue number10
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

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

ASJC Scopus subject areas

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

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