Influence of Cerium and Yttrium on Cu-Cr-Zr Alloys

• 作 者: 李华清 谢水生 米绪军 刘勇 吴朋越 程磊
• 机 构: General Research Institute for Nonferrous Metals State Key Laboratory for Fabrication and Processing
• 出 处: Journal of Rare Earths
• 发表日期: 2004年期
• 关键词: hardness refined alloying softening plasticity slightly deformed dosage tensile

Testing results shows that alloying with Ce and Y improves the hardness and softens temperature of cold worked Cu-Cr-Zr alloys obviously, while the conductivity was fluctuant with the variation of RE content. Observation and analysis indicate that micro-dosage RE elements helps to refine microstructure and morphology of Cu-Cr-Zr-RE alloys, suppress microstructure coarsening and improves homogeneous level of Cu-Cr-Zr alloys. Alloying with 0.01% Ce causes about 1% IACS increment of conductivity, and reduces about 2% ~ 3.5% IACS conductivity after alloying with 0.03% ~ 0.04% RE (Ce or Ce + Y) for Cu-Cr-Zr alloys. The microstructure of as-cast Cu-Cr-Zr alloy is refined after alloying with 0.01% Ce while the plasticity is improved slightly. Alloying with 0.01% ~ 0.04% RE improves the softening temperature of deformed Cu-Cr-Zr alloys about 20 ~ 40 K; hardness is also improved about 20 ~ 35 HV . Test data indicate that alloying with Ce + Y raises softening temperature and hardness of Cu-Cr-Zr alloys more notably than alloying with pure Ce.

Testing results shows that alloying with Ce and Y improves the hardness and softens temperature of cold worked Cu-Cr-Zr alloys obviously, while the conductivity was fluctuant with the variation of RE content. Observation and analysis indicate that micro-dosage RE elements helps to refine microstructure and morphology of Cu-Cr-Zr-RE alloys, suppress microstructure coarsening and improving homogeneous level of Cu-Cr-Zr alloys. Alloying with 0.01% Ce causes about 1% IACS increment of conductivity, and about 2% ~ 3.5 % IACS conductivity after alloying with 0.03% -0.04% RE (Ce or Ce + Y) for Cu-Cr-Zr alloys. The microstructure of as-cast Cu-Cr-Zr alloy is refined after alloying with 0.01% Ce while the plasticity alloying with 0.01% -0.04% RE improves the softening temperature of deformed Cu-Cr-Zr alloys about 20~40 K; hardness is also improved about 20~35 HV. Test data indicate that alloying with Ce + Y raises softening temperature and hardness of Cu-Cr-Zr alloys more notably than alloying with pure Ce.