Search found 1505 matches

by Bernd
Sat Feb 11, 2012 1:00 am
Forum: solidification
Topic: Numerical parameters
Replies: 8
Views: 4643

Re: Numerical parameters

Dear Martin,

you told me in a PM that you use a T-dependent mobility. How does that go together with the variation of mobility you showed - does the given value correspond to the high temperature during the initial stage of solidification?


Bernd
by Bernd
Wed Feb 08, 2012 7:40 pm
Forum: solidification
Topic: Numerical parameters
Replies: 8
Views: 4643

Re: Numerical parameters

Dear Martin, it would be interesting to compare the develolpment of the dendrite shape with time for the different mobility values. I wonder whether the differences which you measure as circumference at a late stage of solidification are already developing at an early stage of dendrite growth, or wh...
by Bernd
Tue Feb 07, 2012 2:33 pm
Forum: solid-solid phase transformations
Topic: Paraequilibrium in MICRESS
Replies: 2
Views: 2943

Re: Paraequilibrium in MICRESS

HI nokkikku, I am not sure whether I understand what you mean by "forced" condition. PE defines a certain condition for redistribution of (typically) substituional elements in that way that they are not redistibuted and therefore do not reduce the total driving force of the phase tronsformation. The...
by Bernd
Fri Jan 27, 2012 6:15 pm
Forum: solidification
Topic: Numerical parameters
Replies: 8
Views: 4643

Re: Numerical parameters

Dear Martin, for me it is not so clear why the circumference is changing so drastically with mobility - you are sure that there is really no instability involved? Essentially, the only way to find that out and to know the "real" shape of the dendrite is to stepwise increase resolution until the resu...
by Bernd
Tue Jan 10, 2012 10:22 pm
Forum: thermodynamics
Topic: thermodymics problem
Replies: 3
Views: 6241

Re: thermodymics problem

Hi Ben, Now I see what you mean! It is possible to get negative compositions inside the interface if you are using an unphysical shape of a linear phase diagram (or possibly if you extrapolate too far from a trmporary linearisation in case of TQ coupling): this is the case if the two phase diagram l...
by Bernd
Mon Jan 02, 2012 12:36 pm
Forum: thermodynamics
Topic: ThermoCal coupled problem, NPLE and no_TQ problem
Replies: 7
Views: 9288

Re: ThermoCal coupled problem, NPLE and no_TQ problem

Dear nokkikku, I also wish you a Happy New Year 2012! NPLE is not a thermodynamic condition - you cannot tell Thermo-Calc to switch to NPLE! It is rather a special kinetic situation where the driving force for phase transformation is reduced because of the immobility of the substitutional elements. ...
by Bernd
Sat Dec 31, 2011 11:11 am
Forum: pre-processing
Topic: failure?
Replies: 6
Views: 5583

Re: failure?

Dear Raghav, this is definitively an error which is due to a wrong input file! The screen output you sent us seems to be screwed up just before it stops - I would guess that the error occurs in the time input data: probably there is a wrong character in one of the lines, which is interpreted wrongly...
by Bernd
Tue Dec 27, 2011 3:15 am
Forum: solidification
Topic: Change of cooling rate
Replies: 1
Views: 1785

Re: Change of cooling rate

Hi Taka,

you can use "connection points" for defining a stepwise temperature-time curve with linear interpolation (see The temperature trend).

Best wishes for the new year!

Bernd
by Bernd
Fri Dec 23, 2011 3:53 pm
Forum: solid-solid phase transformations
Topic: Set the crystal information on the monoclinic structrue
Replies: 1
Views: 2211

Re: Set the crystal information on the monoclinic structrue

Dear weihua, welcome to the MICRESS forum! For describing "metallic" anisotropy, MICRESS provides only three choices: xyz_axis (tetragonal), cubic and hexagonal. There is no built-in function for monoclinic! Because there are too many possible anisotropy functions the user may wish to apply, our str...
by Bernd
Wed Dec 14, 2011 7:44 pm
Forum: thermodynamics
Topic: ThermoCal coupled problem, NPLE and no_TQ problem
Replies: 7
Views: 9288

Re: ThermoCal coupled problem, NPLE and no_TQ problem

Dear nokkikku, I do not know what this diagram you show exactly means, or what it can be used for - can you give me more information? Does this diagram just show the stability regions of the phases or is it really a "phase diagram" which could be used in linearized form in MICRESS? Perhaps, you coul...