Dong, X.-G., Zhou, J., Yu, Y.-Y., Hu, Y.-Y., Mo, A.-J.
36080450100;56510510800;55898556500;55899086600;55898654800;
Influence of rare earth elements on mechanical properties and corrosion resistance of Cu-15Ni alloy
(2013) Journal of Donghua University (English Edition), 30 (3), pp. 249-253.
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886233105&partnerID=40&md5=47578245657ee0322715f14d0a11f5d9

归属机构: College of Material Science and Engineering, Chongqing University, Chongqing 400030, China;
Chongqing Dajiang-Jiexin Forging Co., LTD., Chongqing 400030, China;
China National Erzhong Group Co., Deyang 618000, China
摘要: In order to improve the mechanical property and Cl-+S2- corrosion resistance of B15 copper-nickel alloy, Cu-15Ni-xRE (x: 0-0.1% by weight) alloy was prepared by adding rare earth (RE) in melted Cu-15Ni alloy using metal mould casting method. Optical microscopy (OM), electronic tensile testing machine, X-ray diffraction (XRD), scanning electron microscope (SEM), and electrochemical testing system were used to analyze mechanical property, corrosion resistance property, and surface microstructure of different treatment samples. The results of OM and tensile testing show that the RE addition can effectively deoxidize the alloy melt and the microstructure of the alloy changes from coarse dendrite to small equiaxed grain. By addition of 0.05% RE, the tensile strength and elongation of Cu-15Ni alloys are improved from 294 MPa to 340 MPa, and 8% to 33.5% respectively. The results of electrochemical testing show that the corrosion resistance of Cu-15Ni alloy is greatly improved by adding proper amount of RE, whereas excess addition of RE worsens the corrosion resistance. The optimum RE content was about 0.05% by weight. In comparison with the alloy without RE, the corrosion potential and corrosion current density of Cu-15Ni alloy containing proper RE decreased by about -0.28 V and 70 A/cm2, respectively. Copyright © 2013 Editorial Department of Journal of Donghua University.
作者关键字: Corrosion resistance;  Cu-15Ni alloy;  Mechanical properties;  Modification;  Rare earth (RE)
索引关键字: Corrosion; Corrosion resistance; Materials testing apparatus; Mechanical properties; Microstructure; Nickel; Nickel alloys; Rare earths; Scanning electron microscopy; Surface resistance; Tensile strength; Tensile testing; X ray diffraction, Corrosion current densities; Different treatments; Electrochemical testing; Modification; Ni alloys; Strength and elongations; Surface microstructures; Tensile testing machines, Copper alloys
通讯地址: Dong, X.-G.; College of Material Science and Engineering, Chongqing University, Chongqing 400030, China; 电子邮件: wendxg@163.com
出版商: Editorial Board of Journal of Dong Hua University
ISSN: 16725220
原始文献语言: English
来源出版物名称缩写: J. Donghua Univ.
文献类型: Article
来源出版物: Scopus