Effect of high magnetic field on the primary dendrite arm spacing and segregation of directionally solidified superalloy DZ417G

High magnetic field has been applied to the directional solidification of superalloy DZ417G. The results show that high magnetic field can significantly influence the primary dendrite arm spacing and microsegregation. A 6 T magnetic field can decrease the primary dendrite arm spacing by 22% at a dra...

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Published inJournal of alloys and compounds Vol. 487; no. 1; pp. 612 - 617
Main Authors Zhang, Tao, Ren, Weili, Dong, Jianwen, Li, Xu, Ren, Zhongming, Cao, Guanghui, Zhong, Yunbo, Deng, Kang, Lei, Zuosheng, Guo, Jianting
Format Journal Article
LanguageEnglish
Published Elsevier B.V 13.11.2009
Subjects
Alloys
Convection
Damping
Dendritic structure
Directional solidification
High magnetic fields
High temperature alloys
Magnetic fields
Microstructure
Superalloys
High temperature alloys
High magnetic fields
Directional solidification
Microstructure
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Summary:High magnetic field has been applied to the directional solidification of superalloy DZ417G. The results show that high magnetic field can significantly influence the primary dendrite arm spacing and microsegregation. A 6 T magnetic field can decrease the primary dendrite arm spacing by 22% at a drawing speed of 40 μm/s. Nevertheless, when the magnetic field is greater than 6 T the primary dendrite arm spacing begins to increase. The microsegregation of Ti and Mo can be also decreased by about 28% and 40% respectively with a 6 T magnetic field at a drawing speed of 40 μm/s. These phenomena are attributed to the competitive relationship of the electromagnetic damping and thermoelectromagnetic convection caused by the high magnetic field.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2009.08.025