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


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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/47209

Title:	γ' Precipitation and Growth Kinetics in Mechanically Alloyed Ni-Al
Authors:	Tang, QingXin Browse this author
	Ukai, Shigeharu Browse this author →KAKEN DB
	Minami, Akinobu Browse this author
	Hayashi, Shigenari Browse this author
Issue Date:	2011
Publisher:	Hindawi Publishing Corporation
Journal Title:	Advances in Materials Science and Engineering
Volume:	2011
Start Page:	137387
Publisher DOI:	10.1155/2011/137387
Abstract:	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.
Rights:	http://creativecommons.org/licenses/by/3.0/
Type:	article
URI:	http://hdl.handle.net/2115/47209
Appears in Collections:	工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鵜飼重治

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