AE法による2元系Al-CuおよびAl-Si合金鋳塊における鋳造割れの動的観察

大滝 光弘; 南口 哲也; 宇都 秀之; 本間 梅夫; 雄谷 重夫

doi:10.2464/jilm.37.207

In situ detecting of hot-tearing in solidifying Al-Cu and Al-Si binary alloy castings by means of AE method

Mitsuhiro OHTAKI, Tetsuya NAGUCHI, Hideyuki UTO, Umewo HONMA, Shigeo OYA

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Keywords: acoustic emission, solidification, hot-tearing, continuous type AE signals, burst type AE signals

JOURNAL FREE ACCESS

1987 Volume 37 Issue 3 Pages 207-213

DOI https://doi.org/10.2464/jilm.37.207

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Published: March 31, 1987 Received: August 04, 1986 Available on J-STAGE: July 23, 2008 Accepted: - Advance online publication: - Revised: -
Correction information
Date of correction: July 23, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : AE signals detected directly by use of the inserted wave guide in the final freezing zone of Al-220%Cu and Al-17%Si alloy castings solidifying in the I-beam type hot-tearing mold-were discussed on the basis of the formation process of hot-tearing. Two types of AE signals are detected in the later stage of solidification. One is the continuous type corresponding with the solidification end and the formation of microcracks or shrinkage cavities formed at the grain interfaces. The other is the burst type corresponding with the propagation of the microcracks. On-line monitoring of hottearing may be possible when using a characteristic that numerous and grate amplitude AE signals in the early stage of solidification are shown in the solidifying test bar having remarkable hot-tearing.
Right : AE signals detected directly by use of the inserted wave guide in the final freezing zone of Al-220%Cu and Al-17%Si alloy castings solidifying in the I-beam type hot-tearing mold-were discussed on the basis of the formation process of hot-tearing. Two types of AE signals are detected in the later stage of solidification. One is the continuous type corresponding with the solidification end and the formation of microcracks or shrinkage cavities formed at the grain interfaces. The other is the burst type corresponding with the propagation of the microcracks. On-line monitoring of hot-tearing may be possible when using a characteristic that numerous and grate amplitude AE signals in the early stage of solidification are shown in the solidifying test bar having remarkable hot-tearing.

Date of correction: July 23, 2008 Reason for correction: - Correction: DTPUB Details: Wrong : 19870330
Right : 19870331

Date of correction: July 23, 2008 Reason for correction: - Correction: AFFILIATION Details: Wrong :
1) Faculty of Science and Engineering, Waseda University
2) Furukawa Electric Co.
3) Graduate Student of Science and Engineering, Waseda University
4) Honda Co.
5) Graduate student of Science and Engineering, Waseda University
6) Dia Research Institute
7) The Castings Research Laboratory, Waseda University

Right :
1) Faculty of Science and Engineering, Waseda University
2) Furukawa Electric Co.
3) Science and Engineering, Waseda University
4) Honda Co.
5) Science and Engineering, Waseda University
6) Dia Research Institute
7) The Castings Research Laboratory, Waseda University

Date of correction: July 23, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

AE signals detected directly by use of the inserted wave guide in the final freezing zone of Al-220%Cu and Al-17%Si alloy castings solidifying in the I-beam type hot-tearing mold-were discussed on the basis of the formation process of hot-tearing. Two types of AE signals are detected in the later stage of solidification. One is the continuous type corresponding with the solidification end and the formation of microcracks or shrinkage cavities formed at the grain interfaces. The other is the burst type corresponding with the propagation of the microcracks. On-line monitoring of hot-tearing may be possible when using a characteristic that numerous and grate amplitude AE signals in the early stage of solidification are shown in the solidifying test bar having remarkable hot-tearing.

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Correction information

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