Predicting the martensite start temperature (Ms) of steels
Two things on this page:
- The most up to date database for the martensite start (Ms) temperature of a variety of steels, in a variety of format.
- The most up to date model for the martensite start (Ms) temperature.
This work is now described in two papers to appear soon in Computational Materials Science: a critical assessment of models to predict the Ms temperature of steels and a neural network model for the Ms temperature
The database:
- Open Office format.
- Excel format.
It contains a set of data (1000) that have been verified twice against the original sources, the full references, and a set of data which could not be verified.
The latest neural network model (May 2004)
The PC and Unix/Linux files predict ln(-ln(Ms/1000)) so you need to work out Ms. This is automatic with Predictor.
- Standalone program for DOS/Windows: unzip, test by running model.exe, to predict on your compositions, edit test.dat where the columns are as in labels.txt.
- Source and script to install on linux/unix: extract (tar -zxf Ms_steels.tar.gz), run 'sh install', then run 'sh model.gen'. To predict on your compositions, edit test.dat where the columns are as in labels.txt.
- Package for Neuromat Predictor, simply select 'install package' in Neuromat Predictor.
Online calculations of martensite start temperature can be done here.
Thermodynamic model (updated august 2004)
A computer program to calculate the martensite start temperature of steels using thermodynamics models as developped by Ghosh and Olson (references in documentation):
- Compressed tarball (.tar.gz) of the source code, a binary compiled on Linux, documentation and some test files.
- Some documentation in html format or in pdf format.
To use this program, you need: MTDATA with a license allowing you to compile/run third-party programs, and a linux machine (it should compile on most unix flavours, no idea about Windows, but you are not using it since you are doing serious work).
Relevant publications:
-
Critical assessment of models for predicting the Ms temperature of steels, T. Sourmail and C. Garcia-Mateo
Comp. Mater. Sci., in press
-
A model for predicting the Ms temperatures of steels, T. Sourmail and C. Garcia-Mateo
Comp. Mater. Sci., in press
- Other papers