Enhanced mechanical properties and strengthening mechanism of Cu-Ni-Si alloy with trace chromium addition

doi:10.1016/j.mtcomm.2023.107729

IMR OpenIR

	Enhanced mechanical properties and strengthening mechanism of Cu-Ni-Si alloy with trace chromium addition
	Li, Ying-Huan 1,2; Chen, Shuai-Feng 2; Song, Hong-Wu 2; Zhang, Shi-Hong 2
通讯作者	Song, Hong-Wu(hwsong@imr.ac.cn)
	2024-03-01
发表期刊	MATERIALS TODAY COMMUNICATIONS
卷号	38 页码:14
摘要	Cu-3Ni-0.7Si-xCr-0.05Mg (x = 0.1 and 0.4) (wt% nominal composition) alloys were fabricated to investigate the effect of Cr contents on properties evolution and precipitation behavior of Cu-Ni-Si alloy. The results of the property analysis show that trace addition of 0.1 wt% Cr element contributes a better strength (ultimate tensile strength of 823 MPa) after single cold rolling and aging treatment. The precipitation behavior is characterized by transmission electron microscopy. It is found that nanoscale FCC structural Cr precipitates shift into submicron Cr3Si particles with Cr content increasing from 0.1 wt% to 0.4 wt%. Meanwhile, such superior formation of Cr3Si particle decreases the fraction of 8-Ni2Si owing to quick consumption of Si element from Cu matrix. Further quantitative analysis of various strengthening mechanisms reveals that the changed precipitation behavior notably affects their strengthening contribution to Cr contained alloys, resulting in an increase of more than 5.6% in the Orowan-Ashby mechanism. Surprisingly, in the case of the aging state at a temperature of 460 degrees C for a duration of 2 h, it is confirmed that although a much larger strengthening effect origins from nanosized 8-Ni2Si precipitate, the strength variation relies more on the Cr precipitation. That is, the lower strength at higher Cr content is mainly caused by the lower strengthening effect from Cr element related phases. In addition, the effect of the addition of trace Cr element on the operating mechanism on conductivity is also clarified. The results are expected to provide an appropriate content of Cr element and a dependable processing theory guidance for improving the comprehensive properties of the Cu-Ni-Si alloys.
关键词	Cu-Ni-Si alloy Cr High strength Electrical conductivity Precipitation
资助者	Research and Development Program of Jiangxi Province ; The 2023 Global Common Challenges Project of CAS ; Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1016/j.mtcomm.2023.107729
收录类别	SCI
语种	英语
资助项目	Research and Development Program of Jiangxi Province[20203ABC28W004] ; The 2023 Global Common Challenges Project of CAS[172GJHZ2022054GC] ; Institute of Metal Research, Chinese Academy of Sciences[E055A501]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001133510400001
出版者	ELSEVIER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183027
专题	中国科学院金属研究所
通讯作者	Song, Hong-Wu
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.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	Li, Ying-Huan,Chen, Shuai-Feng,Song, Hong-Wu,et al. Enhanced mechanical properties and strengthening mechanism of Cu-Ni-Si alloy with trace chromium addition[J]. MATERIALS TODAY COMMUNICATIONS,2024,38:14.
APA	Li, Ying-Huan,Chen, Shuai-Feng,Song, Hong-Wu,&Zhang, Shi-Hong.(2024).Enhanced mechanical properties and strengthening mechanism of Cu-Ni-Si alloy with trace chromium addition.MATERIALS TODAY COMMUNICATIONS,38,14.
MLA	Li, Ying-Huan,et al."Enhanced mechanical properties and strengthening mechanism of Cu-Ni-Si alloy with trace chromium addition".MATERIALS TODAY COMMUNICATIONS 38(2024):14.