Materials Algorithms Project
Program Library

Function MAP_STEEL_AFEG

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

Provenance of Source Code

H.K.D.H. Bhadeshia,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.

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Purpose

Calculates the natural logarithm of the activity of iron in austenite.

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Specification

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Description

MAP_STEEL_AFEG calculates the natural logarithm of the activity of iron in austenite.

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References

None Provided.

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Parameters

Input parameters

XEQ - real

XEQ is the paraequilibrium carbon concentration of austenite.

AJ - real

AJ = 1 - e^[-W/(RT)], where W is the carbon-carbon interaction energy in austenite, R is the universal gas constant, and T is the absolute temperature.

Output parameters

MAP_STEEL_AFEG - real function

The natural logarithm of the activity of iron in austenite.

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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

       DOUBLE PRECISION XEQ,AJ,MAP_STEEL_AFEG,XAFEG
       READ (5,*) XEQ,AJ
       XAFEG=MAP_STEEL_AFEG(XEQ,AJ)
       WRITE (6,*) XAFEG
       STOP
       END

2. Program data

0.1   0.1

3. Program results

-0.125345

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Auxiliary Routines

None

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Keywords

activity of iron, austenite

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Download

Download source code

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