Microstructure and Evolution of Mechanically-Induced Ultrafine Grain in Surface Layer of Al-Alloy Subjected to USSP

doi:10.1016/S1359-6454(02)00051-4

IMECH-IR > 力学所知识产出(1956-2008)

	Microstructure and Evolution of Mechanically-Induced Ultrafine Grain in Surface Layer of Al-Alloy Subjected to USSP
	Wu XL(武晓雷); Tao N; Hong YS(洪友士); XU B; LU J; Lu K; Wu, X (reprint author), Cleveland State Univ, Dept Chem Engn, 1960 E24th St,SH455, Cleveland, OH 44115 USA.
发表期刊	Acta Materialia
	2002
卷号	50 期号:8 页码:2075-2084
ISSN	1359-6454
摘要	Experiments were conducted to investigate the ultrafine-grained (UFG) microstructures in the surface layer of an aluminum alloy 7075 heavily worked by ultrasonic shot peening. Conventional and high-resolution electron microscopy was performed at various depths of the deformed layer. Results showed that UFG structures were introdued into the surface layer of 62 μm thick. With increasing strain, the various microstructural features, e.g., the dislocation emission source, elongated microbands, dislocation cells, dislocation cell blocks, equiaxed submicro-, and nano-crystal grains etc., were successively produced. The grain subdivision into the subgrains was found to be the main mechanism responsible for grain refinement. The simultaneous evolution of high boundary misorientations was ascribed to the subgrain boundary rotation for accommodating further strains. Formed microstructures were highly nonequilibratory.  2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
学科领域	力学
DOI	10.1016/S1359-6454(02)00051-4
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000175760200013
关键词[WOS]	RESOLUTION ELECTRON-MICROSCOPY ; NANOCRYSTALLINE MATERIALS ; PLASTIC-DEFORMATION ; REFINEMENT ; COPPER ; SHEAR ; STEEL ; CU
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
引用统计	被引频次：453[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16150
专题	力学所知识产出(1956-2008)
通讯作者	Wu, X (reprint author), Cleveland State Univ, Dept Chem Engn, 1960 E24th St,SH455, Cleveland, OH 44115 USA.
推荐引用方式 GB/T 7714	Wu XL,Tao N,Hong YS,et al. Microstructure and Evolution of Mechanically-Induced Ultrafine Grain in Surface Layer of Al-Alloy Subjected to USSP[J]. Acta Materialia,2002,50,8,:2075-2084.
APA	武晓雷.,Tao N.,洪友士.,XU B.,LU J.,...&Wu, X .(2002).Microstructure and Evolution of Mechanically-Induced Ultrafine Grain in Surface Layer of Al-Alloy Subjected to USSP.Acta Materialia,50(8),2075-2084.
MLA	武晓雷,et al."Microstructure and Evolution of Mechanically-Induced Ultrafine Grain in Surface Layer of Al-Alloy Subjected to USSP".Acta Materialia 50.8(2002):2075-2084.

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