Effects of natural aging on precipitation behavior and hardening ability of peak artificially aged SiCp/Al-Mg-Si composites

doi:10.1016/j.compositesb.2022.109851

CORC > 金属研究所 > 中国科学院金属研究所

	Effects of natural aging on precipitation behavior and hardening ability of peak artificially aged SiCp/Al-Mg-Si composites
	Zhu, S. Z.1,2; Wang, D.2; Xiao, B. L.2; Ma, Z. Y.2
刊名	COMPOSITES PART B-ENGINEERING
	2022-05-01
卷号	236 页码:12
关键词	Aluminum matrix composite Al-Mg-Si alloy Aging Precipitates
ISSN号	1359-8368
DOI	10.1016/j.compositesb.2022.109851
通讯作者	Wang, D.(dongwang@imr.ac.cn)
英文摘要	Silicon carbide particles reinforced 6xxxAl (SiCp/6xxxAl) composites have high strength but low elongation after artificial aging (AA), leading to poor formability. To obtain components with precise dimensions, complex shapes and great load-bearing abilities, it is demanded for SiCp/6xxxAl composites to be cold plastically formed during natural aging (NA) and served after AA. However, the process is limited due to the unclear effects of NA on AA hardening. In this study, the influence of NA on precipitation behaviors and hardening abilities during AA of a SiCp/Al-Mg-Si composite and unreinforced Al-Mg-Si alloy was investigated using hardness, tension, differential scanning calorimetry, electron probe and transmission electron microscopy tests. It is shown that in both the composite and Al-Mg-Si alloy, clusters formed during NA inhibit the formation of beta'' phases and promote the formation of coarse beta ' phases, so NA exhibits negative effects on AA hardening. However, what different from the Al-Mg-Si alloy is that the quenching dislocations in the composite promote the formation of precipitates and thus alleviate the inhibition of NA on precipitation. In addition, the composite has a lower proportion of coarse beta ' phases due to the depletion of Mg by chemical reactions at or near SiCp-Al interfaces. Consequently, the negative NA effect in the composite is much weaker than that in the Al-Mg-Si alloy. This study clarifies how SiCp affect the negative NA effect on AA hardening and is expected to deepen the understanding of aging hardening behaviors of SiCp/Al composites.
资助项目	National Natural Science Foundation of China[51671191] ; Liaon-ing Revitalization Talents Program[XLYC1902058]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000793455200002
资助机构	National Natural Science Foundation of China ; Liaon-ing Revitalization Talents Program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174098]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, D.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 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. Effects of natural aging on precipitation behavior and hardening ability of peak artificially aged SiCp/Al-Mg-Si composites[J]. COMPOSITES PART B-ENGINEERING,2022,236:12.
APA	Zhu, S. Z.,Wang, D.,Xiao, B. L.,&Ma, Z. Y..(2022).Effects of natural aging on precipitation behavior and hardening ability of peak artificially aged SiCp/Al-Mg-Si composites.COMPOSITES PART B-ENGINEERING,236,12.
MLA	Zhu, S. Z.,et al."Effects of natural aging on precipitation behavior and hardening ability of peak artificially aged SiCp/Al-Mg-Si composites".COMPOSITES PART B-ENGINEERING 236(2022):12.