Search found 1265 matches

by Bernd
Mon Sep 13, 2021 3:05 pm
Forum: solidification
Topic: solidification of Al-alloy ( interface adhesion)
Replies: 1
Views: 39

Re: solidification of Al-alloy ( interface adhesion)

Dear Kuang Xianyi, You certainly mean with "interface adhesion" that there is coalescence between the grains even before the intermetallic phases form. I agree that this is expected to come much later, or only in conjunction with secondary phase precipitation. However, coalescence is a phenomenon at...
by Bernd
Mon Sep 06, 2021 9:12 am
Forum: solidification
Topic: solidification of Al-alloy (seed_density)
Replies: 2
Views: 55

Re: solidification of Al-alloy (seed_density)

Dear Xianyi Kuang, Welcome to the MICRESS Forum. It is quite difficult to read your input files because any comments have been stripped. It would be much better to attach the .in output files because they represent cleaned-up copies of the input file with correct comments, and also gives information...
by Bernd
Thu Sep 02, 2021 5:38 pm
Forum: solidification
Topic: Solidification phase growing during simulation
Replies: 5
Views: 183

Re: Solidification phase growing during simulation

Hi Moritz, being short in time, I'll give you a fast answer with hints for avoiding the problems (which may be not complete though...). 1.) Given the high heat extraction rate, you get a cooling rate in the order of -1.E5 K/s. Thus, microstructures are expected to be very fine, while your grid resol...
by Bernd
Tue Aug 31, 2021 4:16 pm
Forum: recrystallisation/grain growth
Topic: Initial microstructure
Replies: 7
Views: 160

Re: Initial microstructure

Dear LV Shaojie,

Sorry, I did not mention that the script is located in the "Tools" directory of your MICRESS installation.

Bernd
by Bernd
Mon Aug 30, 2021 6:13 pm
Forum: recrystallisation/grain growth
Topic: Initial microstructure
Replies: 7
Views: 160

Re: Initial microstructure

Dear shaojielv, If you want to use a different software for simulation of rolling, then the results are in a different format, and you cannot use the method with the .rest file. Instead, you can read the microstructure from an image file, as if it were an experimental microstructure. This has been d...
by Bernd
Mon Aug 30, 2021 10:52 am
Forum: recrystallisation/grain growth
Topic: Initial microstructure
Replies: 7
Views: 160

Re: Initial microstructure

Dear shaojielv, The simplest and best way to achieve that in MICRESS is by using the restart files (.rest) as source for the microstructure of the previous simulation run. The use of restart files has been explained in detail here . Please note that reading restart files as a source for initial micr...
by Bernd
Mon Aug 30, 2021 10:33 am
Forum: solid-solid phase transformations
Topic: Multiphase field coupling
Replies: 2
Views: 85

Re: Multiphase field coupling

Dear shaojielv, MICRESS does not offer simultaneous coupling to 2D/3D-temperature and concentration fields. The reason for that is that these two fields usually have very different length scales, and for this reason it is practically impossible to find useful boundary conditions for the simulation d...
by Bernd
Wed Aug 25, 2021 12:07 am
Forum: solid-solid phase transformations
Topic: Pearlite to Austenite/Cementite
Replies: 8
Views: 290

Re: Pearlite to Austenite/Cementite

Hi Ali, This is what I meant: You do not expect to get rows of round cementite particles. This could be due to a too high nucleation undercooling, i.e. supersaturation of C. The rows of particles further suggest that you do not check for nucleation often enough, or that you have a too long shield ti...
by Bernd
Tue Aug 24, 2021 11:57 pm
Forum: solidification
Topic: Solidification phase growing during simulation
Replies: 5
Views: 183

Re: Solidification phase growing during simulation

Dear Moritz, There is a subtlety with the phase "CARBORUNDUM" when MICRESS tries to automatically get the composition limits for each phase and define the corresponding elements as "stoichiometric: Normally, one would expect this phase to be modeled with 2 sublattices, where one is completely occupi...
by Bernd
Tue Aug 24, 2021 11:49 am
Forum: solid-solid phase transformations
Topic: Pearlite to Austenite/Cementite
Replies: 8
Views: 290

Re: Pearlite to Austenite/Cementite

Dear Ali, Generally, if you do the same simulation with different grid resolution, the finer resolved one should always be more trustworthy. However, if possible you should always compare to experimental results, and it may happen that low resolution hides wrong model assumptions which become eminen...