書誌事項
- タイトル別名
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- Effects of Microstructures and Porosity on Tensile Properties of Al-Si-Cu Cast Alloys
- Al Si Cuケイ チュウゾウ ゴウキン ノ ヒッパリ トクセイ ニ オヨボ
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The effects of microstructure and porosity were investigated on the tensile properties of AC4B type Al-Si-Cu cast alloys containing 7 mass % Si, 3 mass % Cu, 0.17 mass % Mg, 0 to 0.72 mass % Fe and 0 to 0.4 mass % Sr. The specimens were solidified at a cooling velocity of 2.7 K/s or 14.4 K/s in metallic molds. T6 heat treatment was applied to a group of specimens. Since the crack generates from porosity, iron-rich compound and eutectic Si particle, the relation of the tensile properties and the size and morphology of the defects was investigated. Porosities larger than each crystallized phase appeared in the specimens cooled at 14.4 K/s, though the melt was degassed by bubbling a dry Ar gas through it. The crack initiated from larger porosities in the tensile test. In particular, the elongation decreased with the increase in the maximum size of the porosity. On the other hand, larger acicular or Chinese script type iron-rich compounds developed in specimens cooled at 2.7 K/s. The compounds lowered both the tensile strength and elongation, though they tended to raise the 0.2 % proof strength. Higher cooling velocities and proper amounts of Sr addition refined the microstructure and porosities, hence improving the tensile properties of both the as cast and T6 specimens.
収録刊行物
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- 鋳造工学
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鋳造工学 70 (4), 254-259, 1998
公益社団法人 日本鋳造工学会
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詳細情報 詳細情報について
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- CRID
- 1390001206507692416
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- NII論文ID
- 10002553703
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- NII書誌ID
- AN10514770
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- ISSN
- 21855374
- 13420429
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- NDL書誌ID
- 4459428
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可