摘要
In order to improve ingot structure and to refine grain size of Cu Al Ni shape memory alloys by means of electropulse modification, the effect of voltage, frequency and time of the pulse as well as the type of cooling mold on the macrostructure of ingot have been systematically studied. The results show that the above four parameters are important influencing factors on the ingot macrostructure. By appropriately adjusting the parameters, the macrostructure of polycrystalline Cu Al Ni ingot can be significantly improved and nearly fully equiaxied region of the ingot is obtained; the corresponding grain size of the ingot can be dramatically reduced to less than 1/20 of that of unmodified.
In order to improve ingot structure and to refine grain size of Cu Al Ni shape memory alloys by means of electropulse modification, the effect of voltage, frequency and time of the pulse as well as the type of cooling mold on the macrostructure of ingot have been systematically studied. The results show that the above four parameters are important influencing factors on the ingot macrostructure. By appropriately adjusting the parameters, the macrostructure of polycrystalline Cu Al Ni ingot can be significantly improved and nearly fully equiaxied region of the ingot is obtained; the corresponding grain size of the ingot can be dramatically reduced to less than 1/20 of that of unmodified.
出处
《中国有色金属学会会刊：英文版》
CSCD
2002年第3期400-403,共4页
Transactions of Nonferrous Metals Society of China
基金
Project (0 0 10 10 5 5 )supportedbytheNaturalScienceFoundationofLiaoningProvince
