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

doi:10.3139/146.111763

IMR OpenIR

	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
通讯作者	Rong, Lijian(ljrong@imr.ac.cn)
	2019-05-01
发表期刊	INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
ISSN	1862-5282
卷号	110 期号:5 页码:428-435
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.
关键词	Al-Li alloy Double ageing treatment Precipitation behaviour Mechanical properties
DOI	10.3139/146.111763
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000468344200005
出版者	CARL HANSER VERLAG
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/133352
专题	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.