how to turn off the Gibbs-Thomson effect

ripening phenomena, dislocations, grainboundary topology
Ls_Thu
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Re: how to turn off the Gibbs-Thomson effect

Post by Ls_Thu » Tue Dec 17, 2019 4:00 am

Dear Bernd,

Thank you so much for your kind help !

We have tried it one more time but the results still seems un-normal. I have sent the in.file to you. Please check it~

Thank you again for your kind help ! We appreciate you so much~

Regards,

Sai Li
Attachments
1.PNG
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Bernd
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Joined: Mon Jun 23, 2008 9:29 pm

Re: how to turn off the Gibbs-Thomson effect

Post by Bernd » Tue Dec 17, 2019 8:34 pm

Dear Sai-Li,

I tried to run the .in-file you sent me, using the same Version 6.3 as you did. The result looks like that:
0_6C2Mn_last_800_tp_fer_phas_mcr.png
0_6C2Mn_last_800_tp_fer_phas_mcr.png (17.59 KiB) Viewed 1018 times
For my understanding, symmetry is ok, not like in your image. That is strange, what do you do differently?

Bernd

Ls_Thu
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Re: how to turn off the Gibbs-Thomson effect

Post by Ls_Thu » Wed Dec 18, 2019 4:43 pm

Dear Bernd,

Thank you so much for your kind help !

Our results are similar to you ! Maybe the interface missing at the initial stage is not an important matter. But may I ask why the migration rate of the alpha/gamma interface (middle part) is so slow ? it seems not consistent with the experimental results. Do we need to increase the interface energy ?

Thank you so much for your kind help and hard work ! We appreciate it so much !

Regards,

Sai Li

Bernd
Posts: 1148
Joined: Mon Jun 23, 2008 9:29 pm

Re: how to turn off the Gibbs-Thomson effect

Post by Bernd » Sun Dec 22, 2019 11:30 am

Hi Sai Li,

I do not know how fast it should be. The transformation is limited by carbon diffusion, and I cannot imagine that interface energies have a big influence on the middle part.
What I can imagine, however, is that assuming para-equilibrium instead of nple would speed up the transformation because the driving force is higher.

Bernd

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