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| GRAIN REFINEMENT IN BULK UNDERCOOLED Ni-BASED ALLOY | |
| 引用本文： | Li,Delin Yang,Gencang Zhou,Yaohe Northwestern Polytechnical University,Xi'an 710072,China. GRAIN REFINEMENT IN BULK UNDERCOOLED Ni-BASED ALLOY[J]. 中国有色金属学会会刊, 1993, 0(4) |
| 作者姓名： | Li Delin Yang Gencang Zhou Yaohe Northwestern Polytechnical University Xi'an 710072 China |
| 作者单位： | Li，Delin Yang，Gencang Zhou，Yaohe Northwestern Polytechnical University，Xi'an 710072，China |
| 基金项目： | Financilly suported by the National Natural Science Foundation of China |
| 摘 要： | Fluxing of 5 g bulk melt Ni77Si13B10 permits high undercoolings to be attained prior to nu-cleation onset.Investigations of grain refinement in the bulk undercooled alloy as a function ofundercooling,recalescence behavior and cooling rate have been reported.A significant inhomo-geneity of reduction in grain size of a bulk sample is observed,which is caused by the different so-lidification conditions:(1)recalescence process,and(2)the followed plateau in which the heatrelease and extraction rates are equal.It is concluded that the homogeneous refined microstructurecan be achieved if the initial undercooling prior to nucleation,or cooling rate after recalescence isfurther increased. |
GRAIN REFINEMENT IN BULK UNDERCOOLED Ni-BASED ALLOY |
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| Li,Delin Yang,Gencang Zhou,Yaohe Northwestern Polytechnical University,Xi'an ,China. GRAIN REFINEMENT IN BULK UNDERCOOLED Ni-BASED ALLOY[J]. Transactions of Nonferrous Metals Society of China, 1993, 0(4) | |
| Authors: | Li Delin Yang Gencang Zhou Yaohe Northwestern Polytechnical University Xi'an China |
| Affiliation: | Li,Delin Yang,Gencang Zhou,Yaohe Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: | Fluxing of 5 g bulk melt Ni77Si13B10 permits high undercoolings to be attained prior to nu- cleation onset.Investigations of grain refinement in the bulk undercooled alloy as a function of undercooling,recalescence behavior and cooling rate have been reported.A significant inhomo- geneity of reduction in grain size of a bulk sample is observed,which is caused by the different so- lidification conditions:(1)recalescence process,and(2)the followed plateau in which the heat release and extraction rates are equal.It is concluded that the homogeneous refined microstructure can be achieved if the initial undercooling prior to nucleation,or cooling rate after recalescence is further increased. |
| Keywords: | Ni-based alloy high undercooling recalescence grain refinement |
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