Phase Field Simulation of the Stress Field Distribution in TiAl Alloys during Phase Transformation

摘要：

The microstructures of alloys depend strongly on the second phase nucleation processes during phase transformations,especially for the TiAl alloys with the lamellar microstructures. For the shear-involved transformation, the nuclei will induce stress fields around themselves and interact with each other. The dynamic process is too complicated to explore at present by experimental or theoretical analysis. Therefore,the stress field distribution under various conditions has been calculated systematically using the phase field method. The stress field distributions were calculated for different nuclei configurations,such as single lamella, twin related lamellae etc. The dynamic stress field evolution for the growing nuclei with collective nucleation has been calculated in details. The simulation results indicate that the stress field distribution vary with nuclei configurations. The stress field distribution will help people understand the nucleation process and phase transformation mechanism in TiAl alloys.

关键词： Nucleation stress field distribution titanium aluminide computer simulation Phase field

作者: C. Y. Teng A. Du D. S. Xu N. Zhou Y. Wang D. J. Yu R. Yang

作者单位: College of Sciences,Northeastern University,Shenyang,110004,China Institute of Metal Research,Chines College of Sciences,Northeastern University,Shenyang,110004,China Institute of Metal Research,Chinese Academy of Sciences,72 Wenhua Road,Shenyang,110016,China Department of Materials Science and Engineering,The Ohio State University,Columbus,OH 43210,USA

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 804-807

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）