Analysis of retarding effect on a to gamma transformation in Fe-C alloy by addition of dispersed particles

作者：Chen Liang^*; Han Yun; Zhou Bin; Gong Jie

来源：Progress in Natural Science:Materials International , 2015, 25(3): 236-241.

DOI：10.1016/j.pnsc.2015.05.002

• alpha/gamma Interface
• Retarding effect
• Particle morphology
• Interfacial energy

The effects of dispersed second phase particles on alpha-errite (a) to austenite (7) transformation at 1140 K in Fe-C alloy were studied by means of phase field simulation. According to the simulated results, it was found that the particle could retard the migration of alpha/gamma interface. Importantly, both the morphology of particles and the interfacial energy of particle/matrix (alpha or gamma) interface affect the magnitude of the retarding effect. More specifically, the particles with smaller aspect ratio bring stronger retarding force, and when the interfacial energy of particle/gamma interface is larger than that of particle/alpha interface, the retarding effect also becomes significant. These phenomena could be explained from the viewpoint of change in the total amount of the interfacial energy of the simulation system.

• 出版日期2015-6
• 单位山东大学