Publication Date:
2015-06-12
Description:
Interface energies of ?/?, ?/?, ?/?, L/?, and L/? interfaces, at first, as a function of misorientation were evaluated with an aid of atomistic simulations with embedded atom method. Then, under geometric constraints where grains or interfaces compete each other to minimize overall free energy, effective interface energies for those interfaces were quantified. It is found that neither the minimum nor effective ?/? interface energies, 0.41 or 0.56 J/m 2 , respectively, is significantly higher than those of other interfaces including liquid/solid interfaces, but the ?/? interface energy is significantly high for the small entropy change upon ?-? massive-like transformation, resulting in significantly higher undercooling required for ? nucleation in the ? phase matrix than in solidification. Detachment of ?-phase dendrite tips away from ?-phase dendrite trunks can be explained only from a viewpoint of interface energy if small misorientationis introduced at the ?/? interfac...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Permalink