Mechanisms for refining precipitation and improving strengthening of annealed Cu-2Ag alloy via La modification

doi:10.1016/j.jallcom.2021.160912

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	Mechanisms for refining precipitation and improving strengthening of annealed Cu-2Ag alloy via La modification
	Hu, Peng-Hong 1,3; Song, Hong-Wu 1; Chen, Yan 1; Chen, Fei-Peng 2; Zhang, Shi-Hong 1
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2021-11-25
卷号	883 页码:13
关键词	Cu-Ag-La Recrystallization Precipitation strengthening Grain refinement Rare earth
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2021.160912
通讯作者	Zhang, Shi-Hong(shzhang@imr.ac.cn)
英文摘要	A new Cu-2Ag-0.14La alloy is developed to enhance the mechanical property and electrical conductivity with inducement of Ag-rich primary phases and finer nanoscale Ag precipitates. The microstructural evolution and mechanical properties of Cu-2Ag-0.14La and Cu-2Ag alloys obtained by drawing and annealing were then summarized and analyzed. The results indicate that both the yielding and ultimate tensile strengths of annealed Cu-2Ag-0.14La alloy were reinforced after La modification. The average grain sizes of two alloys increase during annealing, but the size ratio (RCu-2Ag-0.14La/RCu-2Ag) dramatically varies with rising the heat temperature, evolving from 70.48% at 400 degrees C to 43.78% at 650 degrees C. Meanwhile, it is found that the refined grains sizes in Cu-2Ag-0.14La alloy are closely related to the nano-scale precipitates (similar to 450 nm), which hinder the formation of subgrain boundaries at 400 degrees C, and impose a stronger pinning effect on boundary migration of recrystallized grains during annealing (>= 450 degrees C). Consequently, higher hardness and electrical conductivity are contributed by grain refinement and dispersion strengthening of the nanosized phases. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	Chinese Academy of Science and Technology Service Network Planning (China)[KFJ-STS-QYZD-145] ; Key Research and Development Program of Jiangxi Province (China)[20203ABC28W004]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000679184800003
资助机构	Chinese Academy of Science and Technology Service Network Planning (China) ; 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/321006/159626]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Shi-Hong
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Jiangxi Copper Technol Res Acad Co Ltd, Nanchang 330029, Jiangxi, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hu, Peng-Hong,Song, Hong-Wu,Chen, Yan,et al. Mechanisms for refining precipitation and improving strengthening of annealed Cu-2Ag alloy via La modification[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,883:13.
APA	Hu, Peng-Hong,Song, Hong-Wu,Chen, Yan,Chen, Fei-Peng,&Zhang, Shi-Hong.(2021).Mechanisms for refining precipitation and improving strengthening of annealed Cu-2Ag alloy via La modification.JOURNAL OF ALLOYS AND COMPOUNDS,883,13.
MLA	Hu, Peng-Hong,et al."Mechanisms for refining precipitation and improving strengthening of annealed Cu-2Ag alloy via La modification".JOURNAL OF ALLOYS AND COMPOUNDS 883(2021):13.