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The origin of nuclei and the refinement mechanism for solidified superalloy IN718 under pulsed magnetic field

Published online by Cambridge University Press:  31 January 2011

Xiaoping Ma ,
Yingju Li  and
Yuansheng Yang
Yuansheng Yang*
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
*
a) Address all correspondence to this author. e-mail: ysyang@imr.ac.cn
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Abstract

The grain refinement effect of a pulsed magnetic field on superalloy IN718 was investigated. The experimental results show that fine equiaxed grains are acquired under the pulsed magnetic field. The refinement effect of the pulsed magnetic field is affected by the mold temperature. And the mixed grains are found in the solidified microstructures under the pulsed magnetic field. The origin of nuclei under the pulsed magnetic field is from the mold wall because of the rough mold surface, the undercooling, and the melt vibration, which all contribute to the refinement of solidified grains.

Keywords

CastingGrain sizeNucleation & growth
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 12 , December 2009 , pp. 3689 - 3692
Copyright
Copyright © Materials Research Society 2009

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References

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