The effect of magnetic field on precipitation phases of single-crystal nickel-base superalloy during directional solidification

The effect of magnetic field on precipitation phases in directional solidified single-crystal nickel-base superalloy was investigated. The magnetic field significantly decreases the size of γ′ and the content of carbides and γ/γ′ eutectic. The decreased magnitude is firstly sharp and then gentle wit...

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Bibliographic Details
Published in:Materials letters 2013-06, Vol.100, p.223-226
Main Authors: Ren, Weili, Lu, Liang, Yuan, Guangzhou, Xuan, Weidong, Zhong, Yunbo, Yu, Jianbo, Ren, Zhongming
Format: Article
Language:English
Subjects:
activation energy
carbides
magnetic fields
Microstructure
Nickel-base superalloy
Segregation
Solidification
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Summary:The effect of magnetic field on precipitation phases in directional solidified single-crystal nickel-base superalloy was investigated. The magnetic field significantly decreases the size of γ′ and the content of carbides and γ/γ′ eutectic. The decreased magnitude is firstly sharp and then gentle with the increasing magnetic field intensity. The γ′ phase refinement could be attributed to a decrease in nucleation activation energy during solid phase transformation. The segregation reduction of alloying elements is responsible for the content decrease of carbides and γ/γ′ eutectic. The magnetic- field-assisted directional solidification provides an effective way to control the size and content of precipitation in superalloys. •A magnetic field distinctly decreases the size of γ′ phase of Ni-based superalloy.•A magnetic field distinctly decreases the content of carbides and γ/γ′ eutectic.•The segregation of alloying elements is decreased by magnetic field.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2013.03.023