X-Ray CT Inspection for Porosities and Its Effect on Fatigue of Die Cast Aluminium Alloy

Material type: その他

Author: KUWAZURU, Osamuほか

Publisher: 一般社団法人日本機械学会

Publication date: 2008

Material Format: Digital

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Note (General)：: 出版タイプ： AOEffect of porosities on the fatigue properties of high-pressure die cast alminium alloy is addressed. Three-dimensional shape and location of...

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Material Type: その他
Title: X-Ray CT Inspection for Porosities and Its Effect on Fatigue of Die Cast Aluminium Alloy
Author/Editor: KUWAZURU, Osamu
MURATA, Yozo
HANGAI, Yoshihiko
UTSUNOMIYA, Takao
KITAHARA, Soichiro
YOSHIKAWA, Nobuhiro
Author Heading: KUWAZURU, Osamu
MURATA, Yozo
HANGAI, Yoshihiko
UTSUNOMIYA, Takao
KITAHARA, Soichiro
YOSHIKAWA, Nobuhiro
Publication, Distribution, etc.: 一般社団法人日本機械学会
Publication Date: 2008
Publication Date (W3CDTF): 2008
Periodical title: Journal of Solid Mechanics and Materials Engineering
No. or year of volume/issue: 2 9
Volume: 2
Issue: 9
Pages: 1220-1231
Subject Heading: Fatigue
Aluminium Alloy
High-Pressure Die Cast
Casting Defect
Gas Pore
Shrinkage Cavity
X-ray Computed Tomography
Target Audience: 一般
Note (General): 出版タイプ： AO
Effect of porosities on the fatigue properties of high-pressure die cast alminium alloy is addressed. Three-dimensional shape and location of porosities in the specimen were inspected by the X-ray CT to determine which pore affects the fatigue crack. The tension-compression fatigue test was carried out and the CT inspection was also conducted for all the specimens before and after the fatigue test. By comparing the CT inspection with the SEM observation of the fracture surface, we confirmed that the crack initiation was restricted to shrinkage pores near the specimen surface, and the inner large pores were not the source of fatigue crack. But we found that a cluster of shrinkage cavities can initiate a crack and affect the fatigue fracture although it exists far inside. Multiple cracks were also found on the bumpy fracture surface, and they seemed to reduce the fatigue life by coalescing into a single large crack. Moreover, we demonstrated the successive CT inspection during the fatigue test, and showed its availability to detect the fatigue crack propagation behaviour.
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ