MICRESS Forum

Dear PeGr, I tried your simulation input files as you sent them using MICRESS Version 7.1, and the results seems not so bad. That means, you get solidification in form of s dendrite, nucleation of the peritectic phase at the interfaces between the dendrite and the liquid, and complete solidification...

Dear kaiyang,

More information is required. Please attach input files or send them as PM if confidential.

Hi PeGr,

there seems to be something wrong with the .GES5-file - has it been created under Windows?

Hi Ghavam, I think you have the following errors in your input file: 1.) You cannot have set C to stoichiometric when using the nple or para option in MICRESS. I also don't think it makes much sense otherwise. 2.) It is absolutely necessary to have some updating of thermodynamic data, e.g. all 0.01 ...

Dear Ghavam, If you think the transformation should be very fast because of a diffusionless transformation, you should not use "mob_corr", because this limits the transformation kinetics to "diffusion-limited". You say that nple or para/paratq gives numerical problems - which are the problems? If th...

Hi David, Welcome to the MICRESS Forum! It is also nice to hear that, as you say, you have overcome the numerical issues with the LAVES phase and already got reasonable results for solidification under SLM-conditions. With performance issues, the first thing to do should be to have a look at the .Ta...

Dear worker, Welcome to the MICRESS Forum! While in newer MICRESS versions, the "penalty" function (which uses the modification of the driving force to prevent negative phase compositions) can be used independently from the "limits" (which do not allow TQ-equilibria outside a user-defined compositio...

Dear Roscoe, This option has been introduced in Version 7.1 of MICRESS and can be specified in the Output section of the driving file: # Output # ====== # # Output times # ------------ # Finish input of output times (in seconds) with 'end_of_simulation' # 'regularly-spaced' outputs can be set with '...

Of course, the last formula must read:

f'_α=(f_α/(f_α+f^*_m))^3/2 ∗ (f_α+f^*_m)

with

f^*_m = f_m -f_crit if f_m ≥ f_crit
f^*_m = 0 else

Dear A ZU, Welcome to the MICRESS forum. Unfortunately, there are various reasons which can lead to a behavior like what you describe, especially in an old MICRESS version like 6.4. But, generally, I would proceed in the following way: 1.) Check whether your secondary phase has been attributed to th...