Improvement of Charpy impact strength of aluminum alloy die castings by PRPC process

Yoshihiko Hangai; Soichiro Kitahara; Kenji Sato; Osamu Kuwazuru; Takao Utsunomiya; Nobuhiro Yoshikawa

doi:10.1299/kikaia.74.915

Improvement of Charpy impact strength of aluminum alloy die castings by PRPC process

Yoshihiko Hangai, Soichiro Kitahara, Kenji Sato, Osamu Kuwazuru, Takao Utsunomiya, Nobuhiro Yoshikawa

Research output: Contribution to journal › Article › peer-review

Abstract

An eruption of porosities which degrade strength reliability of products, is inevitable in the die casting process. We have investigated PRPC (Porosity Reducing Post Compression) process of ADC12 aluminum alloy die castings to reduce inside porosity. In this study, a validity of PRPC process is demonstrated in terms of the Charpy impact strength. We ensure that the porosity ratio was considerably reduced by the PRPC process by means of X-ray CT observation. We conclude that the Charpy impact strength improves since the effective cross-sectional area of the specimen concerning fracture increases after PRPC process without any harmful influence. This conclusion is exemplified by the flat fracture surface of the specimen after PRPC process.

Original language	English
Pages (from-to)	915-916
Number of pages	2
Journal	Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	74
Issue number	6
DOIs	https://doi.org/10.1299/kikaia.74.915
Publication status	Published - 2008 Jun
Externally published	Yes

Keywords

Aluminum alloy
Charpy impact strength
Die casting
Fracture surface
Plastic working
Porosity
X-ray computed tomography

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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Improvement of Charpy impact strength of aluminum alloy die castings by PRPC process. / Hangai, Yoshihiko; Kitahara, Soichiro; Sato, Kenji; Kuwazuru, Osamu; Utsunomiya, Takao; Yoshikawa, Nobuhiro.

In: Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 74, No. 6, 06.2008, p. 915-916.

Research output: Contribution to journal › Article › peer-review

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abstract = "An eruption of porosities which degrade strength reliability of products, is inevitable in the die casting process. We have investigated PRPC (Porosity Reducing Post Compression) process of ADC12 aluminum alloy die castings to reduce inside porosity. In this study, a validity of PRPC process is demonstrated in terms of the Charpy impact strength. We ensure that the porosity ratio was considerably reduced by the PRPC process by means of X-ray CT observation. We conclude that the Charpy impact strength improves since the effective cross-sectional area of the specimen concerning fracture increases after PRPC process without any harmful influence. This conclusion is exemplified by the flat fracture surface of the specimen after PRPC process.",

keywords = "Aluminum alloy, Charpy impact strength, Die casting, Fracture surface, Plastic working, Porosity, X-ray computed tomography",

author = "Yoshihiko Hangai and Soichiro Kitahara and Kenji Sato and Osamu Kuwazuru and Takao Utsunomiya and Nobuhiro Yoshikawa",

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AU - Hangai, Yoshihiko

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AU - Utsunomiya, Takao

AU - Yoshikawa, Nobuhiro

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AB - An eruption of porosities which degrade strength reliability of products, is inevitable in the die casting process. We have investigated PRPC (Porosity Reducing Post Compression) process of ADC12 aluminum alloy die castings to reduce inside porosity. In this study, a validity of PRPC process is demonstrated in terms of the Charpy impact strength. We ensure that the porosity ratio was considerably reduced by the PRPC process by means of X-ray CT observation. We conclude that the Charpy impact strength improves since the effective cross-sectional area of the specimen concerning fracture increases after PRPC process without any harmful influence. This conclusion is exemplified by the flat fracture surface of the specimen after PRPC process.

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KW - Die casting

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KW - Plastic working

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