Artefact of Phase Content and Concentration Profile in a 1D Simulation
Posted: Tue Jul 02, 2019 2:27 am
Hi all,
I have encountered a possible artefact. I am trying to simulate austenite formation from ferrite with a simple 1D, isothermal model (input files attached). Initially both the parent ferrite (phase 1) and austenite have a nominal C concentration of 0.039 wt%. When I start a simulation at 1100K, at the first time step the initial austenite slab split into 2 (see the figures attached) and gave a drop in austenite fraction and a strange concentration profile. Obviously the simulation will still reach the equilibrium fraction of austenite, but the morphology is not correct. Interestingly enough, this does not happen in each of my simulations but only a few of them. For example, the same simulation at 1150K (input file also attached) gives a nice growth of the austenite slab. I have both input files attached here.
I wonder if you have any suggestions to get rid of this artefact.
Thanks in advance,
Billy
I have encountered a possible artefact. I am trying to simulate austenite formation from ferrite with a simple 1D, isothermal model (input files attached). Initially both the parent ferrite (phase 1) and austenite have a nominal C concentration of 0.039 wt%. When I start a simulation at 1100K, at the first time step the initial austenite slab split into 2 (see the figures attached) and gave a drop in austenite fraction and a strange concentration profile. Obviously the simulation will still reach the equilibrium fraction of austenite, but the morphology is not correct. Interestingly enough, this does not happen in each of my simulations but only a few of them. For example, the same simulation at 1150K (input file also attached) gives a nice growth of the austenite slab. I have both input files attached here.
I wonder if you have any suggestions to get rid of this artefact.
Thanks in advance,
Billy