Dear Jane,
While for the "normal" molar volume all elements are counted, the "mechanically relevant" molar volume only refers to the lattice-building (=substitutional) atoms. If coupling to database is used, the distinction is made automatically.
Bernd
Search found 1507 matches
- Sun Apr 30, 2023 4:33 pm
- Forum: solid-solid phase transformations
- Topic: Eigenstrain
- Replies: 14
- Views: 53371
- Fri Apr 28, 2023 3:26 pm
- Forum: solid-solid phase transformations
- Topic: Eigenstrain
- Replies: 14
- Views: 53371
Re: Eigenstrain
Hi Jane, 1.) There is none ;) 2.) Volume is transformed in the following way to obtain the eigenstrain ε of phase α. Here a is a lattice constant, and β is the reference phase. a = ( Vm ) 1/3 ε(α) = [a(α) /a(β)] - 1 However, if you are using direct input of eigenstrains, you should essentially speci...
- Tue Apr 25, 2023 5:47 pm
- Forum: solid-solid phase transformations
- Topic: Eigenstrain
- Replies: 14
- Views: 53371
Re: Eigenstrain
Dear Jane, Eigenstrain is a required input parameter for any simulation with stress coupling. It can only disfavor a phase transition if it is higher for the forming phase than for the vanishing. I would advise you to use volume notation and use respective molar volumes. Btw, you have a typo in the ...
- Fri Apr 21, 2023 8:45 pm
- Forum: solid-solid phase transformations
- Topic: Eigenstrain
- Replies: 14
- Views: 53371
Re: Eigenstrain
Dear Jane, As far as I know, eigenstrains are always formulated relative to a reference phase which the user has to define in MICRESS. Thus, there is no need to worry about the absolute values. If you do not want to assume isotropic eigenstrain (then you could simply define them by volume), then you...
- Thu Apr 20, 2023 5:16 pm
- Forum: solid-solid phase transformations
- Topic: Eigenstrain
- Replies: 14
- Views: 53371
Re: Eigenstrain
Hi Jane, I try to answer one by one: 1.) For incorporating concentration dependent eigenstrains you must use "mechano_chemical" as type of mechanical contribution. Then, if you use a database with volume data, you should use "volume" for the notation of eigenstrains, and "database" for "(mechanical ...
- Fri Apr 14, 2023 8:37 pm
- Forum: solid-solid phase transformations
- Topic: austenite to pearlite transformation
- Replies: 1
- Views: 6765
Re: austenite to pearlite transformation
Dear Vitoria,
I am not an expert of vanadium steels, but I don't see a reason why not...
You may try to do so either fully spatially resolved for a limited number of cementite lamellae, or on the grain length scale by using the "unresolved" effective eutectoid model.
Bernd
I am not an expert of vanadium steels, but I don't see a reason why not...
You may try to do so either fully spatially resolved for a limited number of cementite lamellae, or on the grain length scale by using the "unresolved" effective eutectoid model.
Bernd
- Fri Mar 31, 2023 5:10 pm
- Forum: Homogenization/heat treatments
- Topic: 2 Liquid phases during dissolution
- Replies: 3
- Views: 12397
Re: 2 Liquid phases during dissolution
Dear Baptiste, The problem you pose definitively is not an easy one. It took me some time to figure out what are the main problems here. Given that this is not a usual case, the usual advice may not work here. Technically speaking, the problems are the strongly "demixing" interaction of the two liqu...
- Thu Mar 23, 2023 5:04 pm
- Forum: Homogenization/heat treatments
- Topic: 2 Liquid phases during dissolution
- Replies: 3
- Views: 12397
Re: 2 Liquid phases during dissolution
Dear Baptiste, Welcome to the MICRESS Forum! If a phase which is described in a Calphad database has different stability ranges in composition space with miscibility gaps in between, then this is treated as "composition sets" in Thermo-Calc. Essentially, those sets are treated as if they were differ...
- Tue Mar 07, 2023 7:56 pm
- Forum: solid-solid phase transformations
- Topic: stress and strain
- Replies: 2
- Views: 8880
Re: stress and strain
Dear Shaojielv, There are many possibilities how to get zero values for stress and strain, e.g. if both phases have exactly the same molar volume. But I don't know why the transformation then stopped - perhaps you have done some wrong input when changing to stress coupling, or you are using paramete...
- Wed Jan 11, 2023 10:29 pm
- Forum: trouble-shooting
- Topic: Messages: toolCheckFile & Error in routine 'outDiffKoeff'
- Replies: 5
- Views: 14524
Re: Messages: toolCheckFile & Error in routine 'outDiffKoeff'
Dear Mauro, Sorry for the late response. I have run your input file and found some problems with the "profile-500.txt"-file which you provided me by PM: The file contains a lot of trailing Tab-characters which gave me input errors. After cleaning the file, everything is running fine. Please start cl...