Effect of Magnetic Field Configuration on Stray-Crystal Formation with Different Platform Sizes during Directional Solidification of Single-Crystal Superalloy  

作　　者：Keke Lu Congjiang Zhang Xiaotan Yuan Hongbin Yu Weili Ren Biao Ding Haibiao Lu Yunbo Zhong Zuosheng Lei Hui Wang Qiuliang Wang Peter KLiaw Xuezhi Qin Lanzhang Zhou 

机构地区：[1]State Key Laboratory of Advanced Special Steel,Shanghai Key Laboratory of Advanced Ferrometallurgy,Shanghai University,Shanghai 200444,China [2]Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China [3]Department of Materials Science and Engineering,The University of Tennessee,Knoxville,TN 37996,USA [4]Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2024年第5期904-914,共11页金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52373319);by the Independent Research and Development Project of State Key Laboratory of Advanced Special Steel,Shanghai Key Laboratory of Advanced Ferrometallurgy,Shanghai University(SKLASS 2022-Z03).

摘　　要：The magnetic field is an effective means to control the solidification structure and the defects of metal and semiconductor crystals.This work investigates the effects of Cusp magnetic field(CMF)and longitudinal magnetic field(LMF)on the stray-crystal formation in the platform regions during the directional solidification of single-crystal superalloy with the different cross section sizes.The application of CMF reduces the formation of platform stray-crystal,while LMF increases its generation.As the platform size increases,the stray-crystal ratio increases regardless of whether the magnetic fields are applied or not,the effectiveness of CMF increases,while that of LMF decreases.The reason that the effects of CMF and LMF on the platform stray-crystal formation could be attributed to the change of flow structure from the distribution characteristics of the thermoelectric magnetic force and the magnetic damping force near the liquid-solid interface.

关 键 词：Stray-crystal Magnetic field Single-crystal superalloy Cross section change Directional solidification 

分 类 号：TG132.3[一般工业技术—材料科学与工程]