Suppressed negative effects of natural aging by pre-aging in SiCp/6092Al composites

doi:10.1016/j.compositesb.2021.108730

IMR OpenIR

	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
通讯作者	Wang, D.(dongwang@imr.ac.cn)
	2021-05-01
发表期刊	COMPOSITES PART B-ENGINEERING
ISSN	1359-8368
卷号	212 页码:11
摘要	For 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.
关键词	Metal-matrix composites (MMCs) Particle-reinforcement Al-Mg-Si-Cu alloys Multi-step aging treatment
资助者	National Key R&D Program of China ; National Natural Science Foundation of China
DOI	10.1016/j.compositesb.2021.108730
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFB0703104] ; National Natural Science Foundation of China[51671191]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Composites
WOS记录号	WOS:000632889600031
出版者	ELSEVIER SCI LTD
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/161978
专题	中国科学院金属研究所
通讯作者	Wang, D.
作者单位	1.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
推荐引用方式 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.