MICRESS Forum

Dear Bernd,

I hope this message finds you well.

I would like to ask for your advice regarding the definition of a temperature-dependent cooling rate in MICRESS.

In my current simulations, I am using a linear cooling condition. However, for my study on solid-state phase transformations (especially martensitic transformation), I would like to introduce a two-stage cooling strategy. Specifically, I aim to apply:

one cooling rate above the martensite start temperature (Ms), and
a different cooling rate below Ms.

I am not entirely sure how this can be properly implemented within the current “Process Conditions → Temperature → linear cooling” framework.

Therefore, I would like to kindly ask:

Is it possible to define a piecewise cooling rate as a function of temperature in MICRESS?
If so, is there a recommended way to implement this (e.g., using temperature profiles from file or user-defined functions)?
Or should this be realized indirectly through external temperature input (ASCII profile)?

I would greatly appreciate any guidance or suggestions you could provide, as I want to ensure that the thermal boundary conditions are physically consistent for my martensite transformation simulations.

Thank you very much for your time and support.

Best regards,
Zelin Zhang

Dear Zelin Zhang,

There are many ways how you can implement that in MICRESS. In the case of piece-wise linear temperature curves like those you need, the simplest method is to use a "complex" temperature curve which can be assembled easily.

There has been a major change in the input, however, with introducing MICRESS version 7.3, which makes it even more easy. For the recent MICRESS versions, you just can give the points of the T-t-curve (between which there is linear interpolation) as a table within the MICRESS input file:


For older versions, the points of the T-t-curve can be specified as so-called "connecting points":


I hope this answers your question.

Bernd