In-Situ Analyzing the Influence of Thermoelectromagnetic Convection on the Nucleation Ahead of the A

• 作 者: WANG Jiang FAUTRELLE Yves REN Zhong-ming LI Xi NGUYEN-THI Henri MANGELINCK-NOEL Nathalie SALLOUM ABOU JAOUDE Georges ZHONG Yun-bo KALDRE Imants BOJAREVICS Andris BULIGINS Leonid
• 机 构: SIMAP/EPM-Madylam,BP 75 ENSEEG,38402 St-Martin d\'Heres,France,Department of Material Science and
• 出 处: Journal of Iron and Steel Research(International)
• 发表日期: 2012年S1期
• 关键词: equiaxed nucleation branch advancing columnar synchrotron solute ahead solidifie

Sn-3wt%Pb alloy was directionally solidified without and with a 0.08T transverse magnetic field(TMF),and real-time recorded by in-situ synchrotron X-ray imaging.Results indicate that TMF shortened the distance from the location of nucleation to the advancing interface,and accelerated the growth rate of the equiaxed crystal,which caused the columnar-to-equiaxed transition(CET)finally.The thermoelectromagnetic convection(TEMC)in front of the interface and around the crystal’s dendritic branch should respond to changes of the distance and the growth rate.

Sn-3wt% Pb alloy was directionally solidified without and with a 0.08T transverse magnetic field (TMF), and real-time recorded by in-situ synchrotron X-ray imaging. Results indicate that TMF shortened the distance from the location of nucleation to the advancing interface, and accelerated the growth rate of the equiaxed crystal, which caused the columnar-to-equiaxed transition (CET) finally. The thermoelectromagnetic convection (TEMC) in front of the interface and around the crystal’s dendritic branch should respond to changes of the distance and the growth rate.