Effects of Cr addition on the constitutive equation and precipitated phases of copper alloy during hot deformation - Details

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Abstract：

The　Cu-Ni-Si　alloy　has　widely　applications　in　the　lead　frames　and　electronics　industries　due　to　its　high　strength　and　conductivity.　In　this　work,　hot　deformation　behavior　of　the　Cu-1.5Ni-1.1Co-0.6Si　and　Cu-1.5Ni-1.1Co-0.6Si-0.1Cr　alloys　were　investigated　through　the　isothermal　compression　tests　using　the　Gleeble-1500D　thermo-mechanical　simulator　operating　at　the　temperature　ranging　from　500　°C　to　900　°C　and　0.001–10　s−1　strain　rate.　The　deformed　microstructure　was　characterized　by　the　electron　backscatter　diffraction　(EBSD)　and　the　transmission　electron　microscopy.　The　constitutive　equations　of　the　alloys　were　established.　According　to　the　microstructure　analysis,　it　can　be　observed　that　the　grain　size　of　the　alloy　with　Cr　was　more　uniform.　In　addition,　the　misorientation　angle　of　14.19　during　recrystallization　was　significantly　lower　than　24　after　the　recrystallization,　which　means　that　the　migration　rate　of　grain　boundaries　is　slow.　The　texture　of　the　Cu-Ni-Co-Si　alloy　at　800　°C　is　the　Goss　{011}〈100〉　texture　and　{001}〈100〉　cubic　texture,　while　the　Goss　texture　at　900　°C　is　replaced　by　the　{011}　〈112〉brass　texture.　The　effects　of　Cr　on　precipitation　phases　were　analyzed,　and　the　precipitated　phases　were　(Ni,　Co)2Si,　Co2Si.　The　addition　of　Cr　promoted　precipitation　and　significantly　reduced　the　precipitate　size.　The　addition　of　Cr　can　improve　the　strength　and　activation　energy　of　the　alloy.　The　activation　energy　was　569.8　kJ/mol　and　639.5　kJ/mol,　respectively.　©　2020

Keyword：

Silicon alloys Textures Cobalt alloys Chromium alloys Constitutive equations Grain boundaries Compression testing High strength alloys Activation energy Nickel alloys Recrystallization (metallurgy) Electronics industry Copper alloys High resolution transmission electron microscopy Deformation Strain rate Hot working

Author Community：

[ 1 ] [Ban, Yijie]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 2 ] [Ban, Yijie]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 3 ] [Ban, Yijie]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 4 ] [Zhang, Yi]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 5 ] [Zhang, Yi]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 6 ] [Zhang, Yi]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 7 ] [Jia, Yanlin]College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 8 ] [Jia, Yanlin]School of Materials Science and Engineering, Central South University, Changsha; 410083, China
[ 9 ] [Tian, Baohong]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 10 ] [Tian, Baohong]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 11 ] [Tian, Baohong]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 12 ] [Volinsky, Alex A.]Department of Mechanical Engineering, University of South Florida, Tampa; 33620, United States
[ 13 ] [Zhang, Xiaohui]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 14 ] [Zhang, Xiaohui]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 15 ] [Zhang, Xiaohui]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 16 ] [Zhang, Qifei]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 17 ] [Zhang, Qifei]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 18 ] [Zhang, Qifei]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 19 ] [Geng, Yongfeng]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 20 ] [Geng, Yongfeng]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 21 ] [Geng, Yongfeng]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 22 ] [Liu, Yong]School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang; 471023, China
[ 23 ] [Liu, Yong]Collaborative Innovation Center of Nonferrous Metals, Luoyang; Henan Province; 471023, China
[ 24 ] [Liu, Yong]Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang; 471023, China
[ 25 ] [Li, Xu]Center for Advanced Measurement Science, National Institute of Metrology, Beijing; 100029, China

Reprint Author's Address：

[zhang, yi]collaborative innovation center of nonferrous metals, luoyang; henan province; 471023, china;;[zhang, yi]school of materials science and engineering, henan university of science and technology, luoyang; 471023, china;;[zhang, yi]henan key laboratory of nonferrous materials science and processing technology, luoyang; 471023, china

Email：

yizhang@haust.edu.cn

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