書誌事項
- タイトル別名
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- Dependences of Grain Size and Strain-Rate on Deformation Behavior of Commercial Purity Titanium Processed by Multi-Directional Forging
- タジク タンゾウ カコウ オ ホドコシタ コウギョウヨウ ジュンチタン ノ ヘンケイ キョドウ ノ ケッショウ リュウケイ イソンセイ ト ヒズミ ソクド イソンセイ
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抄録
<p>Strain-rate dependencies of deformation behavior of commercial purity titanium specimens having different grain sizes were systematically investigated. Ultrafine-grained titanium with an average grain size of 0.07 µm (UFG-Ti) fabricated by multi-directional forging followed by conventional thermo-mechanical processing, and fine-grained (FG-Ti) and coarse-grained (CG-Ti) specimens with an average grain sizes of 0.8 µm and 12 µm attained by its, respectively, annealing at 773 K and 973 K for 1.8 ks were prepared. The FG- and UFG-Ti specimens exhibited strong strain-rate dependence of 0.2％ proof stress, while that of CG-Ti ones were almost constant regardless of applied strain-rate. In-situ X-ray diffraction measurements during tensile tests were also conducted at synchrotron radiation facility, SPring-8. Using the modified Williamson-Hall and the modified Warren-Averbach methods, the activated slip systems and change in dislocation density during deformation were estimated. As a result, it was found that <a> and <c+a> slips were activated in FG- and UFG-Ti specimens. On the other hand, the activation of <c+a> slip was never observed in the CG-Ti ones. It can be, thus, concluded that the different strain-rate dependency of deformation behaviors of specimens with different grain sizes were ascribed to the difference in the deformation mechanisms.</p>
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 83 (12), 465-473, 2019-12-01
公益社団法人 日本金属学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390282752372799616
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- NII論文ID
- 130007751059
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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
- 030105862
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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