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 PublicationActa Materialia
2002
Volume50Issue:8Pages:2075-2084
ISSN1359-6454
AbstractExperiments 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
DOI10.1016/S1359-6454(02)00051-4
Indexed BySCI ; EI
Language英语
WOS IDWOS:000175760200013
WOS KeywordRESOLUTION ELECTRON-MICROSCOPY ; NANOCRYSTALLINE MATERIALS ; PLASTIC-DEFORMATION ; REFINEMENT ; COPPER ; SHEAR ; STEEL ; CU
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Citation statistics
Cited Times:350[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/16150
Collection力学所知识产出(1956-2008)
Corresponding AuthorWu, 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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