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

Tang, QingXin; Ukai, Shigeharu; Minami, Akinobu et al.

Advances in Materials Science and Engineering, 2011, 2011, 137387

Permalink : https://hdl.handle.net/2115/47209

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アクセス権	open access
URI	https://hdl.handle.net/2115/47209
タイトル	γ' Precipitation and Growth Kinetics in Mechanically Alloyed Ni-Al
著者	Tang, QingXin ; Ukai, Shigeharu ; Minami, Akinobu ; Hayashi, Shigenari
著者名 Tang, QingXin
e-Rad_Researcher 00421529 著者名 Ukai, Shigeharu
著者名 Minami, Akinobu
著者名 Hayashi, Shigenari
言語	英語
発行日	2011
出版者	Hindawi Publishing Corporation
収録物名	Advances in Materials Science and Engineering
巻(号)	2011
ページ	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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 3.0 Unported
PISSN	1687-6822
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1155/2011/137387