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Program MAP_STEEL_EFFECTIVE_DIFFUSIVITY

  1. Provenance of code.
  2. Purpose of code.
  3. Specification.
  4. Description of program's operation.
  5. References.
  6. Parameter descriptions.
  7. Error indicators.
  8. Accuracy estimate.
  9. Any additional information.
  10. Example of code
  11. Auxiliary routines required.
  12. Keywords.
  13. Download source code.
  14. Links.

Provenance of Source Code

Murugananth Marimuthu,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge CB2 3QZ, U.K.

E-mail: Ananth

Added to MAP: November 2002.

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Purpose

FORTRAN program to calculate the mole fraction of precipitates and wt% of solute in ferrite. It also calculates the effective diffusivity which is proportional to the interface velocity of a precipitate considering a multicomponent system. The program should not be used for systems which contain more than one precipitate phase. This program uses MTDATA.

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Specification

Language: FORTRAN
Product form: Source Code
Platform : Sun OS

Complete program.

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Description

The files associated with this module are :

creep_module.mpiContains the inputs for MTDATA.
creep_module.mprResult from MTDATA calculations.
comp_dataContains composition in the order specified in Readme.txt file.
temp_onlyYou need to specify the temperature values in this file for the corresponding composition in the file "comp_data". The temperature at which phase stability calculation is to be performed will be read from this file.
MTDATA_OUTPUTAll the calculations done by MTDATA are printed in this file.
ppt_fraction_cContains mole fractions of all the phases.
SOLID_SOLNThis file contains information about the wt% of dissolved solutes in ferrite. The format of this file is Cr Mo W V Nb N C (all in wt%). Note this format, since the file itself will not have any information about the format.
Deff.datContains the effective diffusivity (Deff) of M23C6, M6C, Laves Phases, HCP_A3, M7C3, VN, NbC and NbN respectively. The format of the file follows the same order.
one_by_D_eff.datThis file contains information about 1/Deff. Format of the file is same as in "Deff.dat". The values in this file can be approximated to the interface velocity of a precipititate considering multicomponents NOT multiphase. Calculated as in reference 1.



Follow the steps listed below to use the module :

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References

  1. D. Venugopalan and J. S. Kirkaldy, Hardenability concepts with applications to steels,Editors D. V. Doane and J. S. Kirkaldy TMS-AIME, pages 249-267.

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Parameters

Input parameters

File : comp_data

1. C (wt%)
2. Si(wt%)
3. Mn(wt%)
4. P (wt%)
5. S (wt%)
6. Cr(wt%)
7. Mo(wt%)
8. W (wt%)
9. Ni(wt%)
10. Cu(wt%)
11. V (wt%)
12. Nb(wt%)
13. N (wt%)
14. Al(wt%)
15. B (wt%)
16. Co(wt%)
17. Ta(wt%)
18. O (wt%)
19. Re(wt%)
File : temp_only

corresponding temperature of each composition dataline in file comp_data

Output parameters

Check the appropriate file for the information on phase fraction or amount of dissolved solutes or effective diffusivity.

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Error Indicators

None.

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Accuracy

No information supplied.

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Further Comments

None.

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Example

1. Program text

Complete program.

2. Program data


See file comp_data and Readme.txt

3. Program results


MTDATA_OUTPUT, ppt_fraction_c, SOLID_SOLN, Deff.dat and one_by_D_eff.dat

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Auxiliary Routines

No auxillary routines

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Keywords

Steels, equilibrium phases, phase fractions, effective diffusivity.

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Download

Download source code

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MAP originated from a joint project of the National Physical Laboratory and the University of Cambridge.

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