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γ' Precipitation and Growth Kinetics in Mechanically Alloyed Ni-Al


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タイトル: γ' Precipitation and Growth Kinetics in Mechanically Alloyed Ni-Al
著者: Tang, QingXin 著作を一覧する
Ukai, Shigeharu 著作を一覧する
Minami, Akinobu 著作を一覧する
Hayashi, Shigenari 著作を一覧する
発行日: 2011年
出版者: Hindawi Publishing Corporation
誌名: Advances in Materials Science and Engineering
巻: 2011
開始ページ: 137387
出版社 DOI: 10.1155/2011/137387
抄録: The precipitation and growth kinetics ofγ' precipitates, which are strengthening factors in Ni-base oxide dispersion strengthened (ODS) superalloys, were investigated. The cuboidal-type γ' precipitates are formed in conventional arc-melted Ni-Al alloys, whereas spherical-type precipitates are formed in the mechanically alloyed (MAed) specimens. The morphology is controlled by a lattice misfit between the γ' precipitates and the matrix at the aging temperature of 800℃. The growth kinetics of the γ' precipitates can be followed by Ostwald ripening. The Arrhenius plot yielded a lower activation energy for the solute atom diffusion in MAed specimens, which is attributed to their high dislocation density and nanosized grains.
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 鵜飼 重治


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