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Grain size effect on tensile deformation behaviors of pure aluminum
Wang, B. B.1,3; Xie, G. M.2; Wu, L. H.3; Xue, P.3; Ni, D. R.3; Xiao, B. L.3; Liu, Y. D.1; Ma, Z. Y.3
Corresponding AuthorXue, P.(pxue@imr.ac.cn)
2021-07-13
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume820Pages:9
AbstractGrain refinement is a very effective method to improve the mechanical properties of materials and attracts widespread interests among researchers. However, the grain size effect on the mechanical properties is still unclear due to the undesirable microstructure in ultrafine grained (UFG) materials. In the present work, series of ideal materials with average grain sizes range from 0.7 mu m to 30.0 mu m containing high fraction of high angle grain boundaries (HAGBs), equiaxed grains and low density of dislocations were produced by friction stir processing (FSP). It was found that the Hall-Petch relationships could be classified into three stages as the grain size reduced from coarse grain to UFG regimes, which were decided by the strengthening mechanisms during tensile deformation. The strengthening effect of HAGBs (71 MPa center dot mu m1/2) was almost three times of low angle grain boundaries (25 MPa center dot mu m1/2), resulting in the positive deviation of Hall-Petch slope in fine grain regime by the increased specific surface area of HAGBs. The further positive deviation of the Hall-Petch slope in UFG regime was affected by the occurrence of an extra dislocation source limited strengthening mechanism, which was up to 29 MPa and reached to about 20% of the yield strength. The increased recovery rate of dislocations at HAGBs contributed to the decrease of mobile dislocation density, leading to the losing of work hardening in UFG regime during tensile deformation.
KeywordGrain size effect Tensile properties Hall-petch relationship Strengthening mechanism
Funding OrganizationNational Natural Science Foundation of China ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
DOI10.1016/j.msea.2021.141504
Indexed BySCI
Languageen
Funding ProjectNational Natural Science Foundation of China[52071317] ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University[2020RALKFKT009] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017236]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000668737900002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159954
Collection中国科学院金属研究所
Corresponding AuthorXue, P.
Affiliation1.Northeastern Univ, Sch Mat Sci & Engn, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China
2.Northeastern Univ, State Key Lab Rolling & Automat, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China
3.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Wang, B. B.,Xie, G. M.,Wu, L. H.,et al. Grain size effect on tensile deformation behaviors of pure aluminum[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,820:9.
APA Wang, B. B..,Xie, G. M..,Wu, L. H..,Xue, P..,Ni, D. R..,...&Ma, Z. Y..(2021).Grain size effect on tensile deformation behaviors of pure aluminum.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,820,9.
MLA Wang, B. B.,et al."Grain size effect on tensile deformation behaviors of pure aluminum".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 820(2021):9.
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