The effect of combination of pre-ageing and regression heat treatment on the natural aging behavior in Al-Zn-Mg-Cu alloys correlated with precipitate dissolving ratio

doi:10.1016/j.jmrt.2024.07.018

IMR OpenIR

	The effect of combination of pre-ageing and regression heat treatment on the natural aging behavior in Al-Zn-Mg-Cu alloys correlated with precipitate dissolving ratio
	Liu, Yongquan 1; Wang, Meng 1; Liu, Xudong 2; Yan, Changjian 1; Li, Zimin 1; Okonkwo, Bright O.1; Yan, Desheng 1,2; Wang, Jianqiu 1,2
通讯作者	Wang, Meng(mwang@icost.ac.cn) ; Liu, Xudong(liuxudong@imr.ac.cn) ; Wang, Jianqiu(wangjianqiu@imr.ac.cn)
	2024-07-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	31 页码:2972-2984
摘要	Al-Zn-Mg-Cu alloys have remarkable plasticity and aging-hardening potential, while natural aging during storage and transportation dramatically increases the strength of the alloys and deteriorates the formability by generating massive high-density nano-scaled -clusters. In this study, a combination of pre-aging and regression heat treatment was employed to improve the negative effects of natural aging via regulating the distribution of precipitates and reducing the dissolving ratio. Atomic probe tomography and transmission electron microscope observations were mainly carried out to reveal the mechanism of microstructure evolution caused by heat treatments. The results reveal that the distributions of precipitate density and size vary with different pre-aging time, resulting in the differences in dissolving critical sizes and dissolving ratios of precipitates during regression heat treatments. For the limited pre-aging time, the dramatic dissolution of nano-scale clusters caused the surge of solute concentration in the matrix after regression heat treatments, resulting in considerable secondary precipitation of clusters during the subsequent natural aging process. With the increase of pre-aging time, the size and density of precipitates gradually increased, which reduced the dissolving ratio of precipitates during regression heat treatments. However, as the dissolving ratio declined from around 97.5 % (pre-aging for 0 h) to approx. 69.2 % (pre-aging for 18 h), the solute concentration in the matrix was lower than the secondary precipitation level of clusters, thus suppressing natural aging. Overall, this work provides a novel strategy to control the nature-aging behavior of Al-Zn-Mg-Cu alloys. Meanwhile, the correlation between microstructure evolution and mechanical properties under different heat treatments was systematically discussed.
关键词	Natural aging Regression heat treatment Pre -aging Precipitate regulation Microstructure evolution
资助者	National Natural Science Foundation of China (NSFC) ; Basic and Applied Basic Research Project of Guangzhou
DOI	10.1016/j.jmrt.2024.07.018
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[52301037] ; Basic and Applied Basic Research Project of Guangzhou[202201011148]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001269985300001
出版者	ELSEVIER
引用统计	被引频次：2[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/321006/188219
专题	中国科学院金属研究所
通讯作者	Wang, Meng; Liu, Xudong; Wang, Jianqiu
作者单位	1.Inst Corros Sci & Technol, Guangzhou 510070, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yongquan,Wang, Meng,Liu, Xudong,et al. The effect of combination of pre-ageing and regression heat treatment on the natural aging behavior in Al-Zn-Mg-Cu alloys correlated with precipitate dissolving ratio[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,31:2972-2984.
APA	Liu, Yongquan.,Wang, Meng.,Liu, Xudong.,Yan, Changjian.,Li, Zimin.,...&Wang, Jianqiu.(2024).The effect of combination of pre-ageing and regression heat treatment on the natural aging behavior in Al-Zn-Mg-Cu alloys correlated with precipitate dissolving ratio.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,31,2972-2984.
MLA	Liu, Yongquan,et al."The effect of combination of pre-ageing and regression heat treatment on the natural aging behavior in Al-Zn-Mg-Cu alloys correlated with precipitate dissolving ratio".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 31(2024):2972-2984.