Microstructure evolution of peritectic Al–18 at.%Ni alloy directionally solidified in high magnetic fields  

作　　者：Yubao Xiao Tie Liu Yuxin Tong Meng Dong Jinshan Li Jun Wang Qiang Wang 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China [2]School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China [3]The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China [4]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China

出　　处：《Journal of Materials Science & Technology》2021年第17期51-59,共9页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51690161,51774086,and 21701022);the Fundamental Research Funds for the Central Universities(Nos.N180915002,N170902002 and N170908001);Liaoning Innovative Research Team in University,China(No.LT2017011)。

摘　　要：The effect of a high magnetic field on the microstructural evolution of a peritectic Al—18 at.%Ni alloy during directional solidification and its dependence on pulling speed were investigated.At a low pulling speed,the application of a 2 T magnetic field triggered the appearance of a primary Al_(3)Ni_(2)phase.At higher pulling speeds,a high magnetic field application induced primary Al_(3)Ni_(2)phase segregation that formed close to the central alloy regions.For all pulling speeds,the application of a high magnetic field induced bulk Al_(3)Ni/Al eutectic formation on the upper and lower parts of the alloys,and promoted elongated growth of the peritectic Al_3Ni phase along the magnetic field direction.Microstructural analysis indicated that microstructural evolution that was induced by high magnetic fields can be attributed to solute migration and melt flow that is regulated by magnetic,Lorentz,and thermoelectric magnetic forces and their coupling effects during peritectic solidification.

关 键 词：High magnetic field Peritectic reaction Directional solidification MICROSTRUCTURE 

分 类 号：TG146.21[一般工业技术—材料科学与工程]