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Suppressed negative effects of natural aging by pre-aging in SiCp/6092Al composites
Zhu, S. Z.1,2; Wang, D.1; Xiao, B. L.1; Ma, Z. Y.1
Corresponding AuthorWang, D.(dongwang@imr.ac.cn)
2021-05-01
Source PublicationCOMPOSITES PART B-ENGINEERING
ISSN1359-8368
Volume212Pages:11
AbstractFor most of Al-Mg-Si-(Cu) alloys and their composites, artificial aging hardening can be impaired by precedent natural aging. In this study, a pre-aging treatment before natural aging was adopted to improve the hardness of the artificially aged SiCp/6092Al composite and 6092Al alloy. Effects of the multi-step aging treatment, including pre-aging, natural aging and final artificial aging, on microstructures and mechanical properties were investigated by the hardness test, conductivity test, differential scanning calorimetry and transmission electron microscopy. It was shown that pre-aging exhibited a more obvious improvement in the final hardness in the composite, compared to that in the 6092Al alloy. The supersaturated solute atoms formed clusters during natural aging after pre-aging, but the clustering behaviors were different between the composite and 6092Al alloy, leading to the different pre-aging hardening effects. In the composite, it was easy for supersaturated solute atoms to participate into pre-aging clusters during natural aging. As pre-aging clusters could transform into precipitates during artificial aging, precipitate sizes were not affected by natural aging. In contrast, in the 6092Al alloy, it was easy for supersaturated solute atoms to form new clusters during natural aging after pre-aging. As it was difficult for these new clusters to transform into precipitates during artificial aging, precipitates were enlarged with prolonged natural aging time. Because the clustering behaviors during natural aging after pre-aging showed different effects on precipitation, the hardness after artificial aging did not change with prolonged natural aging time in the composite but decreased in the 6092Al alloy.
KeywordMetal-matrix composites (MMCs) Particle-reinforcement Al-Mg-Si-Cu alloys Multi-step aging treatment
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
DOI10.1016/j.compositesb.2021.108730
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFB0703104] ; National Natural Science Foundation of China[51671191]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Composites
WOS IDWOS:000632889600031
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161973
Collection中国科学院金属研究所
Corresponding AuthorWang, D.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhu, S. Z.,Wang, D.,Xiao, B. L.,et al. Suppressed negative effects of natural aging by pre-aging in SiCp/6092Al composites[J]. COMPOSITES PART B-ENGINEERING,2021,212:11.
APA Zhu, S. Z.,Wang, D.,Xiao, B. L.,&Ma, Z. Y..(2021).Suppressed negative effects of natural aging by pre-aging in SiCp/6092Al composites.COMPOSITES PART B-ENGINEERING,212,11.
MLA Zhu, S. Z.,et al."Suppressed negative effects of natural aging by pre-aging in SiCp/6092Al composites".COMPOSITES PART B-ENGINEERING 212(2021):11.
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