Search found 1417 matches

by Bernd
Sat Jul 02, 2022 12:33 am
Forum: pre-processing
Topic: How to simulate the precipitated phase
Replies: 1
Views: 4

Re: How to simulate the precipitated phase

Dear bachelor, Welcome to the MICRESS Forum! Morphology can have different reasons: It can be due to interface instability (e.g. dendrites or eutectics), to interface anisotropy (e.g. faceted structures), or also to stress effects. If you say your precipitates are round or squared this reminds me to...
by Bernd
Mon Jun 27, 2022 8:41 pm
Forum: solid-solid phase transformations
Topic: ferritic phase transformation
Replies: 4
Views: 20

Re: ferritic phase transformation

Hi lv, I think you can change the behavior by adjusting interfacial energy parameters: If σ(α-α) is chosen smaller than σ(α-γ), there should be wetting between the ferrite precipitates instead of rejection. A factor of 2 is sufficient to achieve full wetting, if the transformation is fully diffusion...
by Bernd
Mon Jun 27, 2022 2:44 pm
Forum: solid-solid phase transformations
Topic: ferritic phase transformation
Replies: 4
Views: 20

Re: ferritic phase transformation

Dear lv,

Did not get your question, can you please explain?

Bernd
by Bernd
Tue Jun 14, 2022 11:53 pm
Forum: solidification
Topic: Stress evolution during solidification
Replies: 1
Views: 73

Re: Stress evolution during solidification

Hi Ghavam,

I think the problem could be that the thermal expansion coefficients which you are using are 2-3 orders of magnitude too high. It is length and not volume expansion which is required here.

Bernd
by Bernd
Thu Jun 09, 2022 12:16 pm
Forum: recrystallisation/grain growth
Topic: Recrystallization
Replies: 17
Views: 568

Re: Recrystallization

Dear Lv,

Your driving file looks ok. The only detail which I do not understand is why you have two different seed types for ferrite on austenite, where one creates reX-energy and the other doesn't...

Bernd
by Bernd
Wed Jun 08, 2022 8:13 pm
Forum: solid-solid phase transformations
Topic: Partition-no-partition transition temperature during pearlite-to-austenite transformation
Replies: 17
Views: 501

Re: Partition-no-partition transition temperature during pearlite-to-austenite transformation

<t>Dear Pina,<br/> <br/> Meanwhile, I intensively checked your problem with the "paratq" model, and I came to the conclusion that there is a fundamental problem: This model uses the tqgdf2 function of the Thermo-Calc TQ-interface which also allows for calculation of para-equilibrium. However, this m...
by Bernd
Tue Jun 07, 2022 7:42 pm
Forum: recrystallisation/grain growth
Topic: Recrystallization
Replies: 17
Views: 568

Re: Recrystallization

Dear Lv, Yes, you can easily omit step 2 in your approach and directly introduce recrystallisation energy using seed type 1. But using seed type 2 instead is more straightforward and also more flexible: Imagine that after recrystallisation you would like to apply another deformation and recrystallis...
by Bernd
Fri Jun 03, 2022 7:42 pm
Forum: solidification
Topic: Solidification for LPBF-AlMg alloys
Replies: 5
Views: 282

Re: Solidification for LPBF-AlMg alloys

Hi Desai, No, it has nothing to do with diffusion data, the error occurred while calculating volumetric data. I tried to reproduce the error, but could not. Instead, there are thousands of other error for interface 0/4 and also for 0/2. My impression is that the basic problem is a too coarse grid re...
by Bernd
Tue May 31, 2022 5:16 pm
Forum: recrystallisation/grain growth
Topic: Recrystallization
Replies: 17
Views: 568

Re: Recrystallization

Dear lv, I am still not sure about how you want to design your recrystallisation model. By specifying "all_interfaces" in the phase input section for bcc, and by specifying the maximum value of reX-energies (1,0 J/cm3) as energy threshold for recrystallisation you have decided that deformed grains c...
by Bernd
Tue May 31, 2022 4:45 pm
Forum: solid-solid phase transformations
Topic: Partition-no-partition transition temperature during pearlite-to-austenite transformation
Replies: 17
Views: 501

Re: Partition-no-partition transition temperature during pearlite-to-austenite transformation

Dear Pina, I still do not understand why you want to apply the higher Mn composition only to the lamellar region and not to the whole area of the colony - what is the reasoning behind? Apart from that, I found a problem in the linearisation parameter sets of fcc/cementite and bcc/cementite with para...