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The relationship of dislocation and vacancy cluster with yield strength in magnetic annealed UFG 1050 aluminum alloy
Cao, Yiheng; He, Lizi; Cao, Xingzhong; Zhang, Peng; Wang, Baoyi; Zhou, Yizhou; Wang, Ping; Cui, Jianzhong; He, LZ (reprint author), Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Peoples R China.
2017-01-02
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume679Pages:417-427
AbstractThe evolutions of tensile properties and microstructures of ultrafine grained (UFG) 1050 aluminum alloy after annealing at 90-210 degrees C for 4 h without and with 12 T high magnetic field were investigated by tensile test, electron back scattering diffraction pattern (EBSD), transmission electron microscopy (TEM) and positron annihilation lifetime spectroscopy (PALS). When annealing temperature increases from 90 degrees C to 150 degrees C, the yield strength (YS) of UFG 1050 aluminum alloy increases, it is because that the increase in the density of vacancy clusters due to the activated monovacancies and the high angle boundaries (HABs) having more stable structures, both of them can act as effective barriers to dislocation motion during tensile deformation. When annealing at 210 degrees C, the YS of UFG 1050 aluminum alloy deceases, it is because that the decrease in the vacancy clusters density due to the thermally activated the vacancy clusters annihilating at sinks and the dislocation density decreases. The YS of magnetic annealed samples are lower at 90 degrees C and 150 degrees C due to the lower density of dislocations and vacancy clusters. The difference of YS between samples annealed without and with magnetic field disappears at 210 degrees C due to the sharply reduced strain hardening stage.; The evolutions of tensile properties and microstructures of ultrafine grained (UFG) 1050 aluminum alloy after annealing at 90-210 degrees C for 4 h without and with 12 T high magnetic field were investigated by tensile test, electron back scattering diffraction pattern (EBSD), transmission electron microscopy (TEM) and positron annihilation lifetime spectroscopy (PALS). When annealing temperature increases from 90 degrees C to 150 degrees C, the yield strength (YS) of UFG 1050 aluminum alloy increases, it is because that the increase in the density of vacancy clusters due to the activated monovacancies and the high angle boundaries (HABs) having more stable structures, both of them can act as effective barriers to dislocation motion during tensile deformation. When annealing at 210 degrees C, the YS of UFG 1050 aluminum alloy deceases, it is because that the decrease in the vacancy clusters density due to the thermally activated the vacancy clusters annihilating at sinks and the dislocation density decreases. The YS of magnetic annealed samples are lower at 90 degrees C and 150 degrees C due to the lower density of dislocations and vacancy clusters. The difference of YS between samples annealed without and with magnetic field disappears at 210 degrees C due to the sharply reduced strain hardening stage.
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 ; [cao, xingzhong ; zhang, peng ; wang, baoyi] chinese acad sci, inst high energy phys, key lab nucl radiat & nucl energy technol, beijing 100049, peoples r china ; [zhou, yizhou] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordMagnetic Field Ultrafine Grained 1050 Alloy Annealing Yield Strength Dislocation Vacancy Cluster
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
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78356
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, Yiheng,He, Lizi,Cao, Xingzhong,et al. The relationship of dislocation and vacancy cluster with yield strength in magnetic annealed UFG 1050 aluminum alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,679:417-427.
APA Cao, Yiheng.,He, Lizi.,Cao, Xingzhong.,Zhang, Peng.,Wang, Baoyi.,...&He, LZ .(2017).The relationship of dislocation and vacancy cluster with yield strength in magnetic annealed UFG 1050 aluminum alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,679,417-427.
MLA Cao, Yiheng,et al."The relationship of dislocation and vacancy cluster with yield strength in magnetic annealed UFG 1050 aluminum alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 679(2017):417-427.
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