Search found 1505 matches

by Bernd
Tue Dec 05, 2023 5:55 pm
Forum: solidification
Topic: Formation of a thick interface during dendritic growth
Replies: 1
Views: 32635

Re: Formation of a thick interface during dendritic growth

Dear Sean, At the first glimpse it looks as if grid resolution would be too low, but only at the first glimpse. Given that you use mob_corr, low resolution would rather result in slow brick-like growth with straight interfaces. Furthermore, you say that you already have checked that... I cannot test...
by Bernd
Wed Nov 29, 2023 5:28 pm
Forum: solidification
Topic: Grain size versus cooling rate ?
Replies: 6
Views: 94662

Re: Grain size versus cooling rate ?

Dear Stephane, I think that the 1D_temp approach indeed is the best one for your case, because it allows combining temperature gradients with the effects of latent heat which you need for the seed density nucleation approach. In case you don't have a fast moving heat source like in L-PBF, perhaps a ...
by Bernd
Tue Nov 28, 2023 12:52 pm
Forum: solidification
Topic: Grain size versus cooling rate ?
Replies: 6
Views: 94662

Re: Grain size versus cooling rate ?

Dear Stephane, When it comes to simulate grain size in case of equiaxed solidification, like Janin I would always prefer the seed-density model (together with latent heat release or 1d-temperature solver). The reason is that what you observe - a decreasing grain size with increased cooling rate - is...
by Bernd
Thu Nov 23, 2023 11:38 pm
Forum: solid-solid phase transformations
Topic: One mistake reminded repeatedly
Replies: 9
Views: 150783

Re: One mistake reminded repeatedly

Dear tatalemon, I have run your two driving files which you have sent me by PM, but I do not get the problems which you have faced ("floating divide by zero" and "floating overflow", resp.). One of the examples runs reasonably well (at least technically) with all solid phases appearing. The second o...
by Bernd
Wed Nov 15, 2023 7:40 pm
Forum: solid-solid phase transformations
Topic: One mistake reminded repeatedly
Replies: 9
Views: 150783

Re: One mistake reminded repeatedly

Dear tatalemon, The simulation does not behave exactly as you describe, but there are some catastrophic errors : 1.) When I run the files you sent me using MICRESS version 6.402, the code stops during input in section "Phase Diagram - input data" because it does not allow defining the matrix compone...
by Bernd
Tue Nov 14, 2023 6:27 pm
Forum: solidification
Topic: Dendritic growth under high cooling rates
Replies: 7
Views: 94298

Re: Dendritic growth under high cooling rates

Dear PeGr, If "Bird's eye" view means that you are looking onto the top so that your simulation domain is along the isothermal plane, then you are right. But then, you cannot simulate nucleation of primary phase inside this plane, because the dendrites come from below. You thus need to set nuclei or...
by Bernd
Tue Nov 14, 2023 12:36 pm
Forum: solid-solid phase transformations
Topic: One mistake reminded repeatedly
Replies: 9
Views: 150783

Re: One mistake reminded repeatedly

Dear tatalemon, Thanks for sending me your input and .ges5-files. Your setup contains a Ni-based fcc-phase which is in contact with a gas phase. 2 oxide phases, (Corundum and Benisite) shall be nucleated at the interface between gas and fcc. When running the simulation using MICRESS Version 6.4, the...
by Bernd
Mon Nov 13, 2023 1:59 pm
Forum: solid-solid phase transformations
Topic: One mistake reminded repeatedly
Replies: 9
Views: 150783

Re: One mistake reminded repeatedly

Hi tatalemon,

Seems to be a problem deep inside the Thermo-Calc TQ-library, which may be due to bug or to errors in your input file. Can you please share your driving file and your .ges5-file if possible?

Bernd
by Bernd
Mon Nov 13, 2023 11:07 am
Forum: solid-solid phase transformations
Topic: Phase diagram
Replies: 1
Views: 6209

Re: Phase diagram

Dear Roscoe, Indeed, it is the multicomponent phase diagram which you should use for obtaining the linearisation data for MICRESS. Using the binary phase diagrams would only be correct in case of dilute alloys. Obtaining linearised descriptions for multicomponent systems is not trivial. You can do t...
by Bernd
Thu Nov 09, 2023 11:57 pm
Forum: solidification
Topic: Dendritic growth under high cooling rates
Replies: 7
Views: 94298

Re: Dendritic growth under high cooling rates

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...