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H.K.D.H. Bhadeshia,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.
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To calculate the differential (with respect to the carbon concentration) of the natural logarithm of the activity of iron in austenite.
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Language: | FORTRAN
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Product form: | Source code |
DOUBLE PRECISION FUNCTION MAP_STEEL_DAFEG(XEQ, AJ)
DOUBLE PRECISION XEQ, AJ
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MAP_STEEL_DAFEG gives the differential (with respect to the carbon concentration) of
the natural logarithm of the activity of iron in austenite.
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None provided.
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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_DAFEG - real
- The differential with respect to carbon of the natural logarithm of the activity of iron in austenite.
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None.
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No information supplied.
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None.
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1. Program text
DOUBLE PRECISION XEQ,AJ,MAP_STEEL_DAFEG,XDAF
READ (5,*) XEQ,AJ
XDAF = MAP_STEEL_DAFEG(XEQ,AJ)
WRITE (6,*) XDAF
STOP
END
2. Program data
0.1 0.1
3. Program results
-31.5585
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None.
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carbon, activity of iron, austenite
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Download source code
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