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ファイル | 記述 | サイズ | フォーマット | |
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14786435.2011.586158.pdf | 4.01 MB | Adobe PDF | 見る/開く |
タイトル: | Plastic deformation of polycrystals of Co |
著者: | Okamoto, Norihiko L. Oohashi, Takashi Adachi, Hiroki Kishida, Kyosuke https://orcid.org/0000-0003-0391-5022 (unconfirmed) Inui, Haruyuki https://orcid.org/0000-0003-0835-6725 (unconfirmed) Veyssière, Patrick |
著者名の別形: | 岡本, 範彦 |
キーワード: | intermetallic compound Co-base superalloys compression deformation behaviour dislocation transmission electron microscopy |
発行日: | Oct-2011 |
出版者: | Taylor & Francis |
誌名: | Philosophical Magazine |
巻: | 91 |
号: | 28 |
開始ページ: | 3667 |
終了ページ: | 3684 |
抄録: | The plastic behaviour of Co3(Al, W) polycrystals with the L12 structure has been investigated in compression from 77 to 1273 K. The yield stress exhibits a rapid decrease at low temperatures (up to room temperature) followed by a plateau (up to 950 K), then it increases anomalously with temperature in a narrow temperature range between 950 and 1100 K, followed again by a rapid decrease at high temperatures. Slip is observed to occur exclusively on {111} planes at all temperatures investigated. The rapid decrease in yield stress observed at low temperatures is ascribed to a thermal component of solid-solution hardening that occurs during the motion of APB-coupled dislocations whose core adopts a planar, glissile structure. The anomalous increase in yield stress is consistent with the thermally activated cross-slip of APB-coupled dislocations from (111) to (010), as for many other L12 compounds. Similarities and differences in the deformation behaviour and operating mechanisms among Co3(Al, W) and other L12 compounds, such as Ni3Al and Co3Ti, are discussed. |
著作権等: | © 2011 Taylor & Francis この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/161765 |
DOI(出版社版): | 10.1080/14786435.2011.586158 |
出現コレクション: | 学術雑誌掲載論文等 |
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