Effect of rare earth addition on microstructural, mechanical and electrical characteristics of Cu-6%Fe microcomposites
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：CHEN Yi MENG Liang ZHANG Jindong WU Zhiwei
Key words：Cu-Fe; drawing; microstructure; mechanical properties; electrical conductivity; rare earths;
Abstract: Cu-6%Fe (mass fraction) microcomposites containing (0-0.30)% rare earth elements were prepared by cold drawing and intermediate heat treatments. Microstructure was observed, and mechanical properties and electrical conductivity were measured for alloys at various drawing strain levels. Adding rare earth elements could reduce the size of primary Fe and Cu dendrites of Cu-6%Fe. Ultimate tensile strength increased but electrical conductivity decreased with the increase of drawing strain. Rare earth additions in Cu-6%Fe slightly increased the strength at low strain and effectively improved the conductivity at high strain. Both strain hardening rate and conductivity loss of Cu-6%Fe containing rare earths were reduced at lower strain than Cu-6%Fe.
CHEN Yi1，MENG Liang1，ZHANG Jindong2，WU Zhiwei1
(1.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;
2.Xinhui Copper Specialization Wires Co Ltd Xingtai 055550 China)
Abstract:Cu-6%Fe (mass fraction) microcomposites containing (0-0.30)% rare earth elements were prepared by cold drawing and intermediate heat treatments. Microstructure was observed, and mechanical properties and electrical conductivity were measured for alloys at various drawing strain levels. Adding rare earth elements could reduce the size of primary Fe and Cu dendrites of Cu-6%Fe. Ultimate tensile strength increased but electrical conductivity decreased with the increase of drawing strain. Rare earth additions in Cu-6%Fe slightly increased the strength at low strain and effectively improved the conductivity at high strain. Both strain hardening rate and conductivity loss of Cu-6%Fe containing rare earths were reduced at lower strain than Cu-6%Fe.
Key words:Cu-Fe; drawing; microstructure; mechanical properties; electrical conductivity; rare earths;
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