書誌事項
- タイトル別名
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- Solidification microstructure and room-temperature fracture toughness of Al-based cast alloys prepared through eutectic reactions in Al-Mg-Zn ternary system
- Al-Mg-Zn3ゲンケイ ノ キョウショウ ハンノウ オ リヨウ シタ Alキ チュウゾウ ゴウキン ノ ギョウコ ソシキ ト シツオン ハカイジンセイ
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抄録
<p>This study was set to examine the fundamentals of solidification microstructure and room-temperature fracture toughness of different eutectic aluminum (Al) alloys strengthened by T-Al6Mg11Zn11 and/or β-Al3Mg2 intermetallic phases. The thermodynamic calculations for an Al-Mg-Zn ternary system assessed three alloy compositions of Al-22.5Mg-23.5Zn, Al-35.5Mg-2Zn and Al-34.5Mg-5Zn (mol%) corresponding to α-Al/T, α-Al/β and α-Al/T/β eutectic compositions, respectively. The designed alloys were prepared by different cast process for changing the cooling rate in solidification. The Al-22.5Mg-23.5Zn and Al-35.5Mg-2Zn alloys exhibited a number of fibrous α phase surrounded by of T-phase and β-phase matrix, respectively. The morphologies of eutectic microstructures were refined by high cooling rate in solidification. The three-phase microstructure of α, T and β phases was often observed in slowly solidified Al-34.5Mg-5Zn alloy, whereas only the α/β two-phase eutectic microstructure was observed in the rapidly solidified alloy sample. The indentation fracture method using Vickers indentation test was applied to measure the room-temperature fracture toughness of the experimental alloys prepared by mold-casting. The α/β twophase eutectic alloys exhibited a low fracture toughness of 1.1 MPa·m 0.5 in comparison with the α/T two-phase eutectic alloy. The lower fracture toughness would be responsible for the brittleness of β-phase matrix in the α/β twophase eutectic alloys.</p>
収録刊行物
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- 軽金属
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軽金属 72 (3), 79-87, 2022-03-15
一般社団法人 軽金属学会
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詳細情報 詳細情報について
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- CRID
- 1390573242959394560
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- NII書誌ID
- AN00069773
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- ISSN
- 18808018
- 04515994
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- NDL書誌ID
- 032043417
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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
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可
