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Contributions to yield strength in an ultrafine grained 1050 aluminum alloy after DC current annealing
Cao, YH; He, LZ; Zhou, YZ; Wang, P; Cui, JZ; He, LZ (reprint author), Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Peoples R China.
2016-09-30
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume674Pages:193-202
AbstractThe ultrafine grained (UFG) 1050 aluminum alloy was prepared by equal channel angular pressing at cryogenic temperature (cryoECAP). The evolution of the yield strength and microstructures of UFG 1050 aluminum alloy after direct electric current (DC current) annealing at 150-400 degrees C for 1 h were investigated by tensile test, electron back scattering diffraction pattern (EBSD) and transmission electron microscopy (TEM). For the cryoECAPed and annealed samples at 150-250 degrees C, the predominant boundaries are high angle boundaries (HABs) (> 60%), many dislocations accumulate at subgrain and/or grain boundaries, the yield strength (126-159 MPa) mainly comes from the dislocation and grain boundary strengthening contributions. While an unusual increase in the yield strength (by 8.1-11.2%) observed in samples annealed at 150-200 degrees C is attributed to an additional strengthening contribution from the more HABs having stable structures which can act as effective barriers to dislocation motion during tensile deformation. When annealing at 300-400 degrees C, the microstructures are free of dislocations, the yield strength (29-45 MPa) comes from the grain boundary strengthening contribution. With the application of DC current, the larger grain size, lower dislocation density and higher fraction of LABs having misorientation angle between 3-7 degrees in samples annealed at 150-250 degrees C result in the lower yield strength, while the smaller average grain sizes in samples annealed at 300-400 degrees C cause the higher yield strength. (C) 2016 Elsevier B.V. All rights reserved.
description.department[cao, yiheng ; he, lizi ; wang, ping ; cui, jianzhong] northeastern univ, minist educ, key lab electromagnet proc mat, shenyang 110819, peoples r china ; [he, lizi ; wang, ping ; cui, jianzhong] northeastern univ, sch mat sci & engn, shenyang 110819, peoples r china ; [zhou, yizhou] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordDirect Electric Current Annealing Ultrafine Grained 1050 Aluminum Alloy Yield Strength Dislocations High Angle Boundaries
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51574076]; Fundamental Research Funds for the Central University [N150902001]
Indexed Bysci
Language英语
WOS IDWOS:000383292800025
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76273
Collection中国科学院金属研究所
Corresponding AuthorHe, LZ (reprint author), Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Peoples R China.
Recommended Citation
GB/T 7714
Cao, YH,He, LZ,Zhou, YZ,et al. Contributions to yield strength in an ultrafine grained 1050 aluminum alloy after DC current annealing[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,674:193-202.
APA Cao, YH,He, LZ,Zhou, YZ,Wang, P,Cui, JZ,&He, LZ .(2016).Contributions to yield strength in an ultrafine grained 1050 aluminum alloy after DC current annealing.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,674,193-202.
MLA Cao, YH,et al."Contributions to yield strength in an ultrafine grained 1050 aluminum alloy after DC current annealing".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 674(2016):193-202.
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