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Hot deformation and activation energy of a CNT-reinforced aluminum matrix nanocomposite
Mokdad, F.; Chen, D. L.; Liu, Z. Y.; Ni, D. R.; Xiao, B. L.; Ma, Z. Y.; Chen, DL (reprint author), Ryerson Univ, Dept Mech & Ind Engn, 350 Victoria St, Toronto, ON M5B 2K3, Canada.; Ma, ZY (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-05-17
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume695Pages:322-331
AbstractHot deformation behavior of a 2.0 wt% CNT/2024Al nanocomposite was studied via high-temperature compression over a temperature and strain rate range of 200-400 degrees C and 0.001-0.1 s(-1), respectively. Both flow stress and Zener-Hollomon parameter increased with decreasing deformation temperature and increasing strain rate. The addition of CNTs led to a significant increase of activation energy of plastic deformation, corroborating the enhanced resistance of the nanocomposite to hot deformation. This was also reflected by the increased compressive yield strength in the nanocomposite due to both Hall-fetch strengthening and effective load transfer of CNTs dispersed in the matrix with well-bonded interfaces. Detailed microstructural examinations at a high strain rate, within the upper and lower temperature limits, revealed the occurrence of second-phase particle shearing, refinement, re-precipitation, and re-orientation. The highly beneficial role of the CNT reinforcement in improving the high-temperature performance of Al alloys was discussed.; Hot deformation behavior of a 2.0 wt% CNT/2024Al nanocomposite was studied via high-temperature compression over a temperature and strain rate range of 200-400 degrees C and 0.001-0.1 s(-1), respectively. Both flow stress and Zener-Hollomon parameter increased with decreasing deformation temperature and increasing strain rate. The addition of CNTs led to a significant increase of activation energy of plastic deformation, corroborating the enhanced resistance of the nanocomposite to hot deformation. This was also reflected by the increased compressive yield strength in the nanocomposite due to both Hall-fetch strengthening and effective load transfer of CNTs dispersed in the matrix with well-bonded interfaces. Detailed microstructural examinations at a high strain rate, within the upper and lower temperature limits, revealed the occurrence of second-phase particle shearing, refinement, re-precipitation, and re-orientation. The highly beneficial role of the CNT reinforcement in improving the high-temperature performance of Al alloys was discussed.
description.department[mokdad, f. ; chen, d. l.] ryerson univ, dept mech & ind engn, 350 victoria st, toronto, on m5b 2k3, canada ; [liu, z. y. ; ni, d. r. ; xiao, b. l. ; ma, z. y.] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
KeywordHot Deformation Metal Matrix Nanocomposite Carbon Nanotube Activation Energy
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNatural Sciences and Engineering Research Council of Canada (NSERC); National Basic Research Program of China [2011CB932603, 2012CB619600]; CAS/SAFEA International Partnership Program for Creative Research Teams; Premier's Research Excellence Award (PREA); NSERC-Discovery Accelerator Supplement (DAS) Award; Canada Foundation for Innovation (CFI); Ryerson Research Chair (RRC) program
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78132
Collection中国科学院金属研究所
Corresponding AuthorChen, DL (reprint author), Ryerson Univ, Dept Mech & Ind Engn, 350 Victoria St, Toronto, ON M5B 2K3, Canada.; Ma, ZY (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Mokdad, F.,Chen, D. L.,Liu, Z. Y.,et al. Hot deformation and activation energy of a CNT-reinforced aluminum matrix nanocomposite[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,695:322-331.
APA Mokdad, F..,Chen, D. L..,Liu, Z. Y..,Ni, D. R..,Xiao, B. L..,...&Ma, ZY .(2017).Hot deformation and activation energy of a CNT-reinforced aluminum matrix nanocomposite.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,695,322-331.
MLA Mokdad, F.,et al."Hot deformation and activation energy of a CNT-reinforced aluminum matrix nanocomposite".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 695(2017):322-331.
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