Pinning effect on migration of δ/γ interface during peritectic transformation in Fe-C system
During continuous casting process of peritectic solidified carbon steels, coarse austenite (γ) grain structure forms, which frequently causes surface cracking of cast slabs. If the migration of the ferrite (δ)/austenite. (γ) interface is inhibited by second phase particles, the completion of 8 to y transformation is retarded, which reduces y grain size due to lowering onset temperature for grain growth. In the present study, a model experiment using a diffusion couple method was employed to carry out an artificial peritectic transformation, where spherical ceramic second phase particles were added into the primary δ phase sample that was in contact with the liquid phase sample. It was found that second phase particles produce pinning effect on δ/γ interface migration. This effect becomes more significant with higher volume fraction of particle, which is similar to the Zener pinning effect on grain growth. Then, the experimental findings were verified by phase field simulations.
solidification pinning effect δ to γ transformation δ/γ interface diffusion couple phase field simulation
Liang Chen Kiyotaka Matsuura Daisuke Sato Munekazu Ohno
Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido, 06 Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13
国际会议
The 11th Asian Foundry Congress(第11届亚洲铸造会议 AFC-11)
广州
英文
1-3
2011-11-12（万方平台首次上网日期，不代表论文的发表时间）