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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 2    April 2003

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Aging transformation in 
Cu-3.2Ni-0.75Si alloy
ZHAO Dong-mei(赵冬梅)1, 2, DONG Qi-ming(董企铭)2
LIU Ping(刘 平)2 , KANG Bu-xi(康布熙)2
HUANG Jin-liang(黄金亮)2, JIN Zhi-hao

1. Institute of Materials Science and Engineering, 
Xi′an Jiaotong University, Xi′an 710049, China
2. Department of Materials Engineering, 
Luoyang Institute of Technology, Luoyang 471039, China

Abstract:The aging processes in Cu-3.2Ni-0.75Si alloy were examined by means of transmission electron microscope , X-ray diffractometer and high-resolution transmission electron microscopy. It is concluded that before the formation of Ni2Si phase there exist continuous phase transformation processes, namely ordering, spinodal decomposition. Thereafter, the solute-rich zones form Ni2Si phase which is coherent with the matrix.

 

Key words:  Cu-Ni-Si alloy; transformation; aging; spinodal decomposition; ordering 

ISSN 1672-7029
CN 43-1423/U

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