5th International Conference on Advances in Solidification Processes (ICASP-5) 5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining (CSSCR-5)

Experiments performed in the International Space Station have evidenced oscillatory modes for the solidification of a succinonitrile-based transparent alloy. These oscillations have been studied by phase-field numerical simulations that allowed a better understanding of their origin [1-2]. A recent re-examination of the experimental data showed that, depending on the misorientation of the crystal axes with respect to the temperature gradient direction, the oscillations may be triggered or inhibited [3]. We present here new results of phase-field simulations that show a similar sensisitivity to the cystal axes misorientation. These results are analyzed and compared with the conclusions drawn from the experimental data. Combining both, a quantitative criterion for the inhibition of the oscillations is obtained. [1] Bergeon et al, Spatiotemporal dynamics of oscillatory cellular patterns in three-dimensional directional solidification, Physical Review Letters, vol 110, p. 226102-1-5, 2013 [2] Tourret at al, Oscillatory cellular patterns in three-dimensional directional solidification , Phys. Rev. E , vol. 92 , p. 042401-1-16, 2015 [3] Pereda et al, Experimental observation of oscillatory cellular patterns in three-dimensional directional solidification, Phys. Rev. E, vol. 95, p. 012803-1-19, 2017