書誌事項
- タイトル別名
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- Effect of solidified microstructures on mechanical properties of AZ91 magnesium alloy.
- AZ91 マグネシウム ゴウキン ノ キカイテキ セイシツ ニ オヨボス ギョ
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抄録
An AZ91 alloy was preparded by a gravity casting process with either constant grain size or constant cooling rate. The as-cast alloys show good mechanical properties with decreasing dendrite arm spacing (DAS) or grain size. These phenomena are possibly explaned by the fact that cracks do not easily propagate in the brittle eutectic Mg17Al12 compounds due to the fine compounds. The ultimate tensile strength (UTS), 0.2% proof stress (PS) and elongation (Ef) at fracture of the T6 treated alloys increase with decreasing grain size. But the UTS and Ef of the alloy remain almost constant with decreasing DAS, while the PS increases with decreasing DAS. These phenomena in the T6 treated alloys are explained by assuming that (1) the stress concentration at a grain boundary is higher with larger grain size, (2) the density of grain boundaries which act as obstacles during crack propagation is higher with smaller grain size and (3) the homogenization is easily achieved in a shorter solution heat-treatment time with a small DAS.
収録刊行物
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- 軽金属
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軽金属 47 (3), 133-138, 1997
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
- 1390282681312325632
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- NII論文ID
- 10003795103
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- NII書誌ID
- AN00069773
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- COI
- 1:CAS:528:DyaK2sXisl2hu7k%3D
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- ISSN
- 18808018
- 04515994
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- NDL書誌ID
- 4172733
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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
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可