Effect of La addition on Ag-rich phase formation and mechanical properties of Cu-2Ag alloys

doi:10.1016/j.jmrt.2022.03.020

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	Effect of La addition on Ag-rich phase formation and mechanical properties of Cu-2Ag alloys
	Hu, Peng-Hong 2,3; Zhang, Shi-Hong 3; Chen, Shuai-Feng 3; Chen, Yan 1; Song, Hong-Wu 3
刊名	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
	2022-05-01
卷号	18 页码:998-1008
关键词	Copper alloy Rare earth Ag-rich phase Strength Electrical conductivity
ISSN号	2238-7854
DOI	10.1016/j.jmrt.2022.03.020
通讯作者	Song, Hong-Wu(hwsong@imr.ac.cn)
英文摘要	A series of novel Cu-2Ag-xLa alloys with reinforced mechanical properties and enhanced electrical conductivities are developed. The effects of La addition on the microstructural features and mechanical properties of as-cast and solution treated Cu-2Ag alloys are systematically investigated. The yielding strength of as-cast Cu-2Ag alloys with 0.02La and 0.07La (wt.%) is considerably reinforced by relative amounts of 55.56% and 30.16%, respectively. The strengthening mechanism for such increased yielding strength is mainly related to the shifting of interfacial relation between matrix and Ag-rich phase from original semicoherent type to non-coherent type with La doping. Consequently, the interface barrier strength is enhanced by the non-coherent interface, and contributes to the increased yielding strength. Meanwhile, the strengthening effect from La addition closely depends on the exact contents of La element. As La content increases from 0.02 to 0.07 (wt.%), the strengthening effect becomes weaker because of the increased space of Ag-rich phases leading to an 16.33% decrease in yield strength. Additionally, La has dual effects on the dissolution of Ag-rich phases and precipitation of new La-rich phase in the as-cast alloys during solution treatment. Simultaneously, the precipitation of the La-rich phase abnormally enhances the electrical conductivity of the solution La-containing alloys when the solution time exceeds 24 h. (C) 2022 The Author(s). Published by Elsevier B.V.
资助项目	Chinese Academy of Science and Technology Service Network Initiative[KFJ-STS-QYZD-145] ; Key Research and Development Program of Jiangxi Province, China[20203ABC28W004]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000793133900010
资助机构	Chinese Academy of Science and Technology Service Network Initiative ; Key Research and Development Program of Jiangxi Province, China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173995]
专题	金属研究所_中国科学院金属研究所
通讯作者	Song, Hong-Wu
作者单位	1.Jiangxi Copper Technol Res Acad Co Ltd, Nanchang 330029, Jiangxi, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hu, Peng-Hong,Zhang, Shi-Hong,Chen, Shuai-Feng,et al. Effect of La addition on Ag-rich phase formation and mechanical properties of Cu-2Ag alloys[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2022,18:998-1008.
APA	Hu, Peng-Hong,Zhang, Shi-Hong,Chen, Shuai-Feng,Chen, Yan,&Song, Hong-Wu.(2022).Effect of La addition on Ag-rich phase formation and mechanical properties of Cu-2Ag alloys.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,18,998-1008.
MLA	Hu, Peng-Hong,et al."Effect of La addition on Ag-rich phase formation and mechanical properties of Cu-2Ag alloys".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 18(2022):998-1008.