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Subroutine MAP_STEEL_INTAN

  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

N.A. Chester,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.

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Purpose

To compensate for any intercritical annealing that has taken place before bainite transformation.

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Specification

Language:FORTRAN
Product form:Source code

SUBROUTINE MAP_STEEL_INTAN(FF,C,CRICH,VPRIOR,INTAN)

DOUBLE PRECISION FF,C(8),CRICH,VPRIOR,TEMPI

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Description

If there is intercritical annealing the volume fraction of prior (allotriomorphic) ferrite and the temperature at which annealing took place, are used to calculate FF, which represents the amount of austenite remaining. The carbon locked inside the ferrite formed at the annealing temperature is calculated using MAP_STEEL_XALPH, converted into weight percent, and the remaining austenite is calculated from this enrichment.

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References

1. N.A. Chester, Unpublished work.

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Parameters

Input parameters

C - real array of dimension 8
C contains the composition of the steel (in weight percent), the elements of the array corresponding to the alloying elements C, Si, Mn, Ni, Mo, Cr, V, Fe.

VPRIOR - real
VPRIOR is the volume fraction of prior ferrite formed during the intercritical annealing.

TEMPI - real
TEMPI is the intercritical annealing temperature (in kelvin).

Output parameters

FF - real
FF is the factore by which all calculated volume fractions are multiplied to allow for the presence of allotriomorphic ferrite. If none of this phase exists, then FF is 1.

CRICH - real
CRICH is the weight percent of carbon in the enriched austenite due to the presence of allotriomorphic ferrite.

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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 C(8),FF,CRICh,VPRIOR,TEMPI
       READ (5,*) C(1),C(2),C(3),C(4)
       READ (5,*) C(5),C(6),C(7),C(8)
       READ (5,*) VPRIOR,TEMPI
       CALL MAP_STEEL_INTAN(FF,C,CRICH,VPRIOR,TEMPI)
       WRITE (6,10) FF,CRICH
10     FORMAT ('FF = ',D13.5,' CRICH = ',D13.5)
       STOP
       END

2. Program data

1.72D-02   2.5D-02   1.71D-02   0.0
0.0        0.0       0.0        0.94
0.2     1073.0

3. Program results

FF = 0.8
CRICH = 0.47

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Auxiliary Routines

MAP_STEEL_XALPH

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Keywords

intercritical annealing, allotriomorphic ferrite, bainite, allottriomorphic, ferrite, anneal, transformation

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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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