Lateral Growth Rate of Cells in Melt

钢铁研究学报(英文版), 2012, 19(4): 28-50.

Lateral Growth Rate of Cells in Melt

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

2.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

3.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

4.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

5.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

基金项目: Item Sponsored by National Natural Science Foundation of China(50874060) Program for Excellent Talents of Liaoning Province in University of China(LR201019)

关键词：生长速度 , 熔体 , 激光共聚焦扫描 , 细胞 , 生长过程 , 凝固过程 , 温度梯度 , 激光显微镜

Lateral Growth Rate of Cells in Melt

CHANG Guo-wei ^1, , CHEN Shu-ying ^2, , LI Qing-chun ^3, , YUE Xu-dong ^4, , JIN Guang-can ^5,

1.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

2.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

3.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

4.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

5.School of Materials Science and Engineering, Liaoning University of Technology, J inzhou 121001, Liaoning, China

Keywords： cell growth , solidification process , carbon steel , in-situ observation ,

Growth process of δ-phase was studied during the solidification of carbon steel.Through analyzing the solute diffusion around cylindrical crystals in the melt,the mathematic representation of lateral growth rate of cylindrical crystals was confirmed;the calculation and analysis of lateral growth rate were carried out.In order to validate the theoretical calculation and analysis,the growth process of δ-phase during the solidification was in-situ observed using a confocal scaning laser microscope（CSLM） and the growth rates were measured through CSLM images.The results show that lateral growth rates of δ-phase in the carbon steel first rapidly decrease with the increase of the radius of the cylindrical crystal,and then slowly fall down or maintain invariable.The radius of δ-phase is the primary factor to affect the growth rate.The higher the temperature gradient is,the bigger the growth rate is.However,the effect of the temperature gradient is feeble.Good correlation is obtained between theoretical analysis and experiment results in absolute values of lateral growth rate and change rule

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Lateral Growth Rate of Cells in Melt

Lateral Growth Rate of Cells in Melt

参考文献