Simulation of Bridgman Directional Solidification Microstructure in a Binary Alloy using Phase Field Method
In this paper, the directional solidification microstructure of Bridgman system was simulated using phase-field method, and different calculated results were obtained with four pulling velocities. When the pulling velocity is 0.06 cm/s, the columnar crystals competitively grow in the initial stage, and have a necking phenomenon in the last stage. When the pulling velocity is 0.04 cm/s, the columnar crystals become thinner and competitively grow all the time, and the microsegregation is bigger. When the pulling velocity is 1.00 cm/s, planar interface comes back, and solute trapping takes place. The columnar crystals become much thinner, and microsegregation decreases. When the pulling velocity is 3.00 cm/s, the grain boundary of columnar crystals becomes unconspicuous, and the degree of microsegregation approaches 1. Transverse solute shows “U shape profiles. With the pulling velocity (vp) increasing, the span of “U figures decreases and the deepness of “U figures decreases too. When the pulling velocity reaches 3.00 cm/s, the “U figures disappear. Transverse solute has a very little fluctuation around the initial concentration and the solute trapping phenomenon takes place.
Jinjun Tang Jianzhong Jiang Liqun Hou Song Ji Xiang Xue
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China Ningbo Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China Ningbo Sub-academy of the National Weapons Science Research Academy, Ningbo 315103, China School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
国际会议
桂林
英文
1-6
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）