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.
Source Publication	Acta Materialia
	2002
Volume	50 Issue:8 Pages:2075-2084
ISSN	1359-6454
Abstract	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.
Subject Area	力学
DOI	10.1016/S1359-6454(02)00051-4
Indexed By	SCI ; EI
Language	英语
WOS ID	WOS:000175760200013
WOS Keyword	RESOLUTION ELECTRON-MICROSCOPY ; NANOCRYSTALLINE MATERIALS ; PLASTIC-DEFORMATION ; REFINEMENT ; COPPER ; SHEAR ; STEEL ; CU
WOS Research Area	Materials Science ; Metallurgy & Metallurgical Engineering
WOS Subject	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Citation statistics	Cited Times:471[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://dspace.imech.ac.cn/handle/311007/16150
Collection	力学所知识产出(1956-2008)
Corresponding Author	Wu, X (reprint author), Cleveland State Univ, Dept Chem Engn, 1960 E24th St,SH455, Cleveland, OH 44115 USA.
Recommended Citation 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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