書誌事項
- タイトル別名
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- Effect of Heat Treatments on Matrix Strength and Precipitation Behavior in Al-Zn-Mg Foams
- Al Zn Mgケイ ハッポウタイ ノ ザイリョウ キョウド ト セキシュツ キョドウ ニ オヨボス ネツ ショリ ノ エイキョウ
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Al-Zn-Mg foams manufactured by a batch casting process were subjected to aging treatments with and without solution treatment. The effect of the heat treatments on matrix strength (micro-hardness) and precipitation behavior in the foams was investigated by means of transmission electron microscopy (TEM) and X-ray absorption fine structure (XAFS) analysis at a synchrotron radiation facility.<br> Foam aged at 398 K for 8 h after the solution treatment showed the greatest increase in strength. Fine precipitates were dispersed homogeneously and densely, which were speculated to be metastable η′ and equilibrium η phases transformed from GP zones. It is estimated that the GP zones were formed during water-quenching after the solution treatment. Overaging treatment at 423 K for 48 h after solution treatment softened the foam past its peak strength by approximately 10 in Vickers hardness. During this treatment, η′ and η phases coarsened significantly and the number density of these precipitates decreased. It is concluded that a significant drop in the strength was suppressed during overaging by the presence of a high density of the GP zones, defined as Zn-Mg ordered phases by the XAFS analysis.<br>
収録刊行物
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- 日本金属学会誌
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日本金属学会誌 73 (8), 630-635, 2009
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001206477352704
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- NII論文ID
- 10025157077
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- NII書誌ID
- AN00187860
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- COI
- 1:CAS:528:DC%2BD1MXhtFKqs77E
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL書誌ID
- 10402840
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可