Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al?Zn?Mg alloy

doi:10.1186/s11671-018-2542-1

IMR OpenIR

	Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al?Zn?Mg alloy
	Wang,Y. L.1,2; Song,Y. Y.1; Jiang,H. C.1; Li,Z. M.1; Zhang,D.1,2; Rong,L. J.1
通讯作者	Jiang,H. C.(hcjiang@imr.ac.cn) ; Rong,L. J.(ljrong@imr.ac.cn)
	2018-04-27
发表期刊	Nanoscale Research Letters
ISSN	1931-7573
卷号	13 期号:1
摘要	AbstractAtom probe tomography (APT) coupling high-resolution transmission electron microscopy (HRTEM) was used to analyze the fraction and compositions of different nanoparticles in two-stage double peaks aging process of Al?Zn?Mg alloy. Al content is found to be closely related to the size of nanoparticles and it can be greater than ~?50.0?at. % in the nanoparticle with the equivalent radius under ~?3.0?nm. Correspondingly, Al content of the nanoparticle, with the equivalent radius over ~?5.0?nm, is measured under ~?40.0?at. %. Evolution from Guinier–Preston (G.P.) zone to η phase is a growing process where Mg and Zn atoms enter the nanoparticle, therefore rejecting Al atoms. G.P. zones can take up a number fraction of ~?85.0 and ~?22.7% of nanoparticles in the first and second peak-aged samples, respectively, and even in the over-aged (T73) sample, they can still be found. As aging time increases, fraction of η′ phases monotonically rises to the peak value (~?54.5%) in the second peak-aged state and then drops, which is significant for the second hardness peak and directly proves their function as the transitional medium. In T73 state, ~?63.3% nanoparticles compose of η phases, which were measured to still contain ~?10.2 to ~?36.4?at. % Al atoms.
关键词	Atom probe tomography (APT) Al?Zn?Mg alloy Two-stage double peaks aging Fraction Compositions
DOI	10.1186/s11671-018-2542-1
语种	英语
WOS记录号	BMC:10.1186/s11671-018-2542-1
出版者	Springer US
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80468
专题	中国科学院金属研究所
通讯作者	Jiang,H. C.; Rong,L. J.
作者单位	1. 2.
推荐引用方式 GB/T 7714	Wang,Y. L.,Song,Y. Y.,Jiang,H. C.,et al. Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al?Zn?Mg alloy[J]. Nanoscale Research Letters,2018,13(1).
APA	Wang,Y. L.,Song,Y. Y.,Jiang,H. C.,Li,Z. M.,Zhang,D.,&Rong,L. J..(2018).Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al?Zn?Mg alloy.Nanoscale Research Letters,13(1).
MLA	Wang,Y. L.,et al."Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al?Zn?Mg alloy".Nanoscale Research Letters 13.1(2018).