Influence of Ag addition on the microstructure and properties of Cu-6.5Fe-0.2Cr alloy prepared by upward continuous casting

被引：17
作者：
Yuan, Dawei [1 ]
Xiao, Xiangpeng [1 ,2 ]
Chen, Jinshui [1 ]
Han, Baojun [3 ]
Huang, Hao [1 ,2 ]
Yang, Bin [1 ]
机构：
[1] JiangXi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Peoples R China
[2] JiangXi Adv Copper Ind Res Inst, Yingtan 335000, Peoples R China
[3] Gannan Normal Univ, Sch Chem & Chem Engn, Ganzhou 341000, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 887卷
基金：
中国国家自然科学基金;
关键词：
Ag element; Tensile strength; Electrical conductivity; Precipitation kinetics; Activation energy; CU-FE; STRENGTHENING MECHANISMS; KINETICS; 1ST-PRINCIPLES; CONDUCTIVITY; DIFFUSION; EVOLUTION; PHASE;
D O I：
10.1016/j.jallcom.2021.161458
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cu-6.5Fe-0.2Cr (CFC) and Cu-6.5Fe-0.2Cr-1Ag (CFCA) alloys were prepared by upward continuous casting to investigate the influence of Ag on the microstructure, mechanical properties and electrical properties of CFC alloy. The properties testing discovered that the mechanical properties and electrical conductivity of CFC alloy were improved by the addition of Ag. The peak strength of CFCA alloy (622 MPa) was 33 MPa higher than that of CFC alloy, and the peak conductivity (67.8% IACS) was increased by 5% IACS after aging. The microstructure observation showed that Cr element was mainly distributed in the primary Fe phase. The addition of Ag refined and promoted the precipitation of nano-scale Fe phase, and improved the coordinated deformation ability of Cu/Fe, resulting in excellent comprehensive performance of CFCA alloy. In addition, the effect of Ag on nano-scale Fe phase precipitation kinetics was explored by the modified Johnson-Mehl-Avrami-Kolmogorov (JMAK). The addition of Ag reduced the activation energy of the Fe phase and promoted the precipitation kinetics of the Fe phase. And the activation energy of CFC and CFCA alloys was 66.1 and 63 kJ/mol, respectively. (c) 2021 Elsevier B.V. All rights reserved.
引用
收藏
页数：11
相关论文
共 38 条
[1]   THE KINETICS OF GRAIN BOUNDARY NUCLEATED REACTIONS [J].
CAHN, JW .
ACTA METALLURGICA, 1956, 4 (05) :449-459
[2]  
Chen LY, 2015, NAT MATER, V14, P707, DOI [10.1038/nmat4288, 10.1038/NMAT4288]
[3]   Microstructure and properties of Cu-11Fe-6Ag in situ composite after thermo-mechanical treatments [J].
Gao, Haiyan ;
Wang, Jun ;
Shu, Da ;
Sun, Baode .
JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 438 (1-2) :268-273
[4]   Effect of Ag on the thermal stability of deformation processed Cu-Fe in situ composites [J].
Gao, Haiyan ;
Wang, Jun ;
Sun, Baode .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 469 (1-2) :580-586
[5]   Effect of Ag on the microstructure and properties of Cu-Fe in situ composites [J].
Gao, HY ;
Wang, J ;
Shu, D ;
Sun, BD .
SCRIPTA MATERIALIA, 2005, 53 (10) :1105-1109
[6]   Effect of Zr on Thermal Stability of Cu-Fe in-situ Composite [J].
Guo, Junqing ;
Yang, He ;
Liu, Ping ;
Jia, Shuguo ;
Bi, Liming .
ADVANCES IN COMPOSITES, PTS 1 AND 2, 2011, 150-151 :1462-+
[7]   A precipitation-hardened high-entropy alloy with outstanding tensile properties [J].
He, J. Y. ;
Wang, H. ;
Huang, H. L. ;
Xu, X. D. ;
Chen, M. W. ;
Wu, Y. ;
Liu, X. J. ;
Nieh, T. G. ;
An, K. ;
Lu, Z. P. .
ACTA MATERIALIA, 2016, 102 :187-196
[8]   Strength and conductivity of Cu-9Fe-1.2X (X = Ag or Cr) filamentary microcomposite [J].
Hong, SI ;
Song, JS .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (04) :985-991
[9]   Nanostructured Cu-Cr alloy with high strength and electrical conductivity [J].
Islamgaliev, R. K. ;
Nesterov, K. M. ;
Bourgon, J. ;
Champion, Y. ;
Valiev, R. Z. .
JOURNAL OF APPLIED PHYSICS, 2014, 115 (19)
[10]   A study on the micro-evolution of mechanical property and microstructures in (Cu-30Fe)-2X alloys with the addition of minor alloying elements [J].
Jeong, Yeon Beom ;
Jo, Hee Ra ;
Kim, Jeong Tae ;
Hong, Sung Hwan ;
Kim, Ki Buem .
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 786 :341-345
1234