書誌事項
- タイトル別名
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- Effects of Ga Concentration, Heat Treatment and Deformation Temperature on Pseudoelasticity of Fe-Ga Polycrystals
- Fe-Ga タケッショウ ノ ギダンセイ ニ オヨボス Ga ノウド,ネツ ショリ,ヘンケイ オンド ノ エイキョウ
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The pseudoelastic behavior of Fe-Ga polycrystals was examined focusing on the effects of Ga concentration, heat treatment and deformation temperature. Fe-Ga polycrystals solutionized at 800℃ exhibited pseudoelasticity at room temperature based on reversible motion of 1/4〈111〉 superpartial dislocations dragging an antiphase boundary (APB) in the D03 superlattice structure. In particular, at and above 25 at%Ga, paired 1/4〈111〉 superpartials dragging the next-nearest-neighbor APB were found to play an important role in the pseudoelasticity. The amount of strain recovery at room temperature was highest at 25 at%Ga. Moreover, heat treatment strongly influenced the pseudoelastic behavior of Fe-Ga alloys. For instance, the L12 and ω-like phases precipitating at higher Ga concentrations led to a decrease in strain recovery since the precipitates suppressed the reversible motion of 1/4〈111〉 superpartials. On the other hand, pseudoelasticity based on twinning and untwinning of 2.2T-type pseudo-twins appeared at low temperatures, especially at −180℃. The energy of {211} pseudo-twins formed in the Fe-Ga alloys was so high that the twins tended to disappear during unloading resulting in the pseudoelasticity. However, the amount of strain recovery decreased if pseudoelasticities based on dislocation motion and twinning concurrently took place between −150℃ and −50℃.<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 77 (6), 237-244, 2013
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
- 1390282681459292544
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- NII論文ID
- 10031176451
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- NII書誌ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL書誌ID
- 024685817
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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
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可