IMECH-IR  > 非线性力学国家重点实验室
Grain Refinement of Pure Ti During Plastic Deformation
Wu S; Fan K; Jiang P; Chen SH(陈少华); Wu, S (reprint author), Renmin Univ China, High Sch, 37 Zhongguancun St, Beijing 100080, Peoples R China.
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2010
Volume527Issue:26Pages:6917-6921
ISSN0921-5093
AbstractThe mechanism of grain refinement was studied in titanium subjected to high-rate surface mechanical attrition treatment. By cross-sectional transmission electron microscopy, the deformation structures were systematically characterized in a nanocrystalline (NC) layer of the treated surface which exhibits a grain size gradient. The microstructural evolution with increasing strain involves (1) the formation of slip bands with dislocation-free cells in their interiors, (2) nucleation and migration of high-angle grain boundaries at cell boundaries consisting of high-density tangled dislocations, leading to the formation of submicrosized grains inside the slip bands, followed by (3) the formation of subgrains and dislocation cells inside the submicrosized grains with increasing misorientations, which finally become NC grains. The mechanism of grain refinement was interpreted in terms of the classical migration dynamic recrystallization (DRX) and continuous rotation DRX, respectively, leading to submicrosized and NC grains with increasing strains at high strain rates. The cooperative grain boundary sliding is active at high strain rate, by the presence of arrays of coplanar grain boundaries. (C) 2010 Elsevier B.V. All rights reserved.
KeywordNanocystalline Dynamic Recrystallization Grain Refinement Surface Mechanical Attrition Treatment Ti
DOI10.1016/j.msea.2010.06.085
Indexed BySCI ; EI
Language英语
WOS IDWOS:000283113200018
WOS KeywordDYNAMIC RECRYSTALLIZATION ; MICROSTRUCTURAL EVOLUTION ; STRUCTURAL REFINEMENT ; FORMATION MECHANISM ; SHEAR LOCALIZATION ; TITANIUM ; METALS ; NANOCRYSTALLIZATION ; TEMPERATURE ; PRINCIPLES
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNSF of China [10721202] ; 973 Project [2010CB631004]
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58600
Collection非线性力学国家重点实验室
Corresponding AuthorWu, S (reprint author), Renmin Univ China, High Sch, 37 Zhongguancun St, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Wu S,Fan K,Jiang P,et al. Grain Refinement of Pure Ti During Plastic Deformation[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2010,527(26):6917-6921.
APA Wu S,Fan K,Jiang P,陈少华,&Wu, S .(2010).Grain Refinement of Pure Ti During Plastic Deformation.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,527(26),6917-6921.
MLA Wu S,et al."Grain Refinement of Pure Ti During Plastic Deformation".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 527.26(2010):6917-6921.
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