Effect of rare earth on the microstructure and mechanical properties of as-cast Cu-30Ni alloy

稀有金属（英文版）, 2009, 25(6): 590-595. doi: 10.1007/s12598-009-0113-4

^1, , ^2, , ^3, , ^4,

1.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

2.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

3.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

4.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

基金项目: the Major State Basic Research Development Program of China(2007CB616903) the National Natural Science Foundation of Jiangsu Province, China(BK2008317) the Cultivation fund of the Key Scientific and Technical Innovation Project, the Ministry of Education of China(707029)

Effect of rare earth on the microstructure and mechanical properties of as-cast Cu-30Ni alloy

MAO Xiangyang ^1, , FANG Feng ^2, , JIANG Jianqing ^3, , TAN Rongsheng ^4,

1.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

2.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

3.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

4.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

Keywords： Cu-Ni alloys

Cu-30Ni-xRE (x=0-0.213) alloys were prepared by a metal mould casting method. The effect of RE on the microstructure and mechanical properties of the alloys was investigated using optical microscope, scanning electronic microscope with energy-dispersive spectrometer, X-ray diffraction, and mechanical test. The results show that RE has obvious effect on refining dendrite structure and grain size, as well as on purifying the melting of Cu-30Ni alloy. With the increase of RE content, the ultimate tensile strength, yield strength, and elongation increase at first and then decrease after adding RE more than 0.095 wt.%. Cu-30Ni-0.095RE alloy possesses preferable mechanical properties, i.e., the ultimate tensile strength, yield strength, and elongation are 308 MPa, 125 MPa, and 51.2%, respectively. The microstructure and mechanical properties are worsened with increasing RE content more than 0.095 wt.%. The improvement of mechanical properties of Cu-30Ni-0.095RE alloy is attributed to RE refining microstructure and purifying the matrix.

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Effect of rare earth on the microstructure and mechanical properties of as-cast Cu-30Ni alloy

参考文献