Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites

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	Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites
	Z. Q. Yang; J. Chen; L. L. He; H. T. Cong; H. Q. Ye
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:12 页码:3633-3644
摘要	The microstructure and grain boundary relaxation in ultrafine-grained AlN oxide composites were studied by electron microscopy observation and internal friction measurement, respectively. Both the microstructure and the internal friction behavior of the composites were strongly influenced by the thermomechanical treatment parameters. All the Al particles were still covered by the native amorphous oxide shells in those composites sintered at T < 823 K, and no indication of Al grain boundary relaxation was detected. Some At oxide shells were cracked, resulting in the formation of a few Al-Al grain boundaries between adjacent particles in the sample sintered at 823 K, and one internal friction peak centered at similar to 440 K was detected. All the oxide shells were broken into small fragments in those samples sintered at T >= 843 K, and two internal friction peaks were detected, one prominent peak at similar to 440 K and one weak peak at similar to 540 K. A microstructure with a bimodal grain size distribution of Al was formed via partial recrystallization after thermomechanical treatment of the sample sintered at 893 K, and two internal friction peaks with comparable intensity were detected. The internal friction peaks were associated with the relaxation of Al grain boundary in the composites. (C) 2009 Acta Matcrialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[yang, zhiqing; chen, ji; he, lianlong; cong, hongtao; ye, hengqiang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [chen, ji] liaoning shihua univ, dept mech engn, fushun 113001, peoples r china.;yang, zq (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;yangzq@imr.ac.cn
关键词	Al Oxide Composite Internal Friction Microstructure Temperature Internal-friction High-purity Aluminum Molecular-dynamics Simulation Nanocrystalline Aluminum Mechanical Spectroscopy Creep Behavior Peak Dislocations Controversy
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WOS记录号	WOS:000267527000020
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32497
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Q. Yang,J. Chen,L. L. He,et al. Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites[J]. Acta Materialia,2009,57(12):3633-3644.
APA	Z. Q. Yang,J. Chen,L. L. He,H. T. Cong,&H. Q. Ye.(2009).Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites.Acta Materialia,57(12),3633-3644.
MLA	Z. Q. Yang,et al."Microstructure and grain boundary relaxation in ultrafine-grained Al/Al oxide composites".Acta Materialia 57.12(2009):3633-3644.