Effect of elastic interaction energy on the spinodal decomposition and later coarsening stage in Fe-20%Mo alloys
Effect of elastic interaction energy on the spinodal decomposition and later coarsening stage is systematically investigated by microscopic phase field kinetic model. According to the results considering elastic interaction energy, the modulated waves and the critical time between spinodal decomposition and coarsening decrease with the increase of elastic interaction energy, so the transformation rate of spinodal decomposition increases. During coarsening, and the special macrolattice and basket-weave structures are formed by the regular aligning of atom enrichment phases. The cubic of atom enrichment phases average size are not satisfy the single lineally relation, and the relationship is broken gradually with the increase of the elastic interaction energy. Therefore, the coarsening mechanism is not single Ostwald ripening coarsening but the interplay of Ostwald coarsening and coalesce growth. With increasing elastic interaction energy, the size and number of anisotropy atom enrichment phases increases. The simulation results considering moderate elastic interaction energy are in accord with the results obtained by transmission electron microscopy (TEM) in Fe-20% Mo alloys.
Rongda Zhao Jingchuan Zhu Zhonghong Lai Yong Liu
School of Materials Science and Engineering, Harbin Institute of Technology Harbin 150001, Peoples Republic of 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）