Study on the microstructure and age hardening capability in Al-Cu-Li alloys with different Cu/Li ratio

doi:10.1515/ijmr-2021-8626

CORC > 金属研究所 > 中国科学院金属研究所

	Study on the microstructure and age hardening capability in Al-Cu-Li alloys with different Cu/Li ratio
	Ma, Juan 3; Liu, Xiaochun 2; Yan, Desheng 1; Rong, Lijian 1
刊名	INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
	2022-07-27
卷号	113 期号:7 页码:671-681
关键词	Ageing Al-Li alloy Cu Li ratio Precipitation hardening
ISSN号	1862-5282
DOI	10.1515/ijmr-2021-8626
通讯作者	Ma, Juan(442319994@qq.com)
英文摘要	The microstructural evolution during natural ageing and artificial ageing treatment has been quantified in Al-Cu-Li alloys with Cu/Li ratios of 2.3 and 3.9. Methods including various ageing, hardness testing, transmission electron microscopy and differential scanning calorimetry were employed. The precipitation of T1 (Al2CuLi) phase was confirmed for the first time in the high Li content alloy under natural ageing treatment for 5 months, while the Li-lean alloy exhibits barely any precipitation at room temperature. Under artificial ageing, the Li-rich alloy exhibits a significant increase in hardness due to the formation of high density spherical delta ' phase. On the other hand, the increasing Cu/Li ratio promotes the precipitation of the Cu containing precipitates T1 and theta (Al2Cu), the high Cu/Li ratio (3.9) alloy shows a recovery of ductility, with a uniform elongation of similar to 20 %, which is caused by the strong interactions between the dislocations and the nano-scale T1 and theta precipitates. Meanwhile, as the main strengthening precipitate changes from theta and T1 to T1 alone with prolonged ageing time, the alloy displays a double-peak age hardening behavior. This work sheds light on the design of high strength and ductile Al-Li alloys through the well-controlled T1 phase precipitation.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	WALTER DE GRUYTER GMBH
WOS记录号	WOS:000813852300001
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174992]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma, Juan
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, Changsha, Peoples R China 3.Chengdu Univ, 2025 Chengluo Rd, Chengdu 610106, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Ma, Juan,Liu, Xiaochun,Yan, Desheng,et al. Study on the microstructure and age hardening capability in Al-Cu-Li alloys with different Cu/Li ratio[J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH,2022,113(7):671-681.
APA	Ma, Juan,Liu, Xiaochun,Yan, Desheng,&Rong, Lijian.(2022).Study on the microstructure and age hardening capability in Al-Cu-Li alloys with different Cu/Li ratio.INTERNATIONAL JOURNAL OF MATERIALS RESEARCH,113(7),671-681.
MLA	Ma, Juan,et al."Study on the microstructure and age hardening capability in Al-Cu-Li alloys with different Cu/Li ratio".INTERNATIONAL JOURNAL OF MATERIALS RESEARCH 113.7(2022):671-681.