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 of single-crystal nickel-base superalloy during directional solidification
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DOI：
10.1016/j.matlet.2013.03.023
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发表时间：
2013-06
影响因子：
3
通讯作者：
W. Ren;L. Lu;Guangzhou Yuan;W. Xuan;Y. Zhong;Jianbo Yu;Z. Ren
中科院分区：
文献类型：
--
作者：
W. Ren;L. Lu;Guangzhou Yuan;W. Xuan;Y. Zhong;Jianbo Yu;Z. Ren
研究了磁场对定向凝固镍基单晶高温合金析出相的影响。磁场使γ′相尺寸、碳化物和γ/γ′共晶含量显著降低。随着磁场强度的增加，减小幅度先急剧后平缓。γ′相的细化是由于固相转变过程中形核激活能降低所致。合金元素的偏析减少是碳化物和γ/γ′共晶含量减少的原因。磁场辅助定向凝固技术为控制高温合金中析出相的尺寸和含量提供了一种有效的方法。
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.