Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy

doi:10.3139/146.111763

CORC > 金属研究所 > 中国科学院金属研究所

	Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy
	Ma, Juan 1,2; Yan, Desheng 1; Rong, Lijian 1; Li, Yiyi 1
刊名	INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
	2019-05-01
卷号	110 期号:5 页码:428-435
关键词	Al-Li alloy Double ageing treatment Precipitation behaviour Mechanical properties
ISSN号	1862-5282
DOI	10.3139/146.111763
通讯作者	Rong, Lijian(ljrong@imr.ac.cn)
英文摘要	The effects of different double ageing processes on the mechanical properties and microstructural evolution in the 1460 alloy were investigated. The corresponding microstructure and mechanical properties of the heat-treated specimens were studied by means of transmission electron microscopy, differential scanning calorimetry, hardness testing and tensile testing. The results show that the elongation of two-step aged (130 degrees C/84 h + 160 degrees C/24 h) samples can be increased to 8 % with a minor decrease in tensile strength (450 MPa). Throughout the two-step ageing process, the precipitation behaviour of the alloy exhibited the following characteristics: the delta' phase formed at lower temperature dissolved into the matrix instead of coarsening and becoming over-aged at the beginning of the second ageing step; finely distributed theta'(Al2Cu) and delta'(Al3Li) at a steady state were obtained, resulting in a significant improvement in tensile strength; and the peak ductility occurred with the precipitation of T1(Al2-CuLi) and consumption of delta'(Al3Li), as small delta' particles caused a co-planar slip, resulting in lower ductility.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	CARL HANSER VERLAG
WOS记录号	WOS:000468344200005
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/133351]
专题	金属研究所_中国科学院金属研究所
通讯作者	Rong, Lijian
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Liaoning, Peoples R China 2.Chengdu Univ, Chengdu, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Ma, Juan,Yan, Desheng,Rong, Lijian,et al. Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy[J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH,2019,110(5):428-435.
APA	Ma, Juan,Yan, Desheng,Rong, Lijian,&Li, Yiyi.(2019).Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy.INTERNATIONAL JOURNAL OF MATERIALS RESEARCH,110(5),428-435.
MLA	Ma, Juan,et al."Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy".INTERNATIONAL JOURNAL OF MATERIALS RESEARCH 110.5(2019):428-435.