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Subroutine MAP_STEEL_ELONG

  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.

Subroutine added: April 1999.

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Purpose

To calculate the non-uniform elongation and the volume fraction of inclusions in the primary microstructure of low alloy steel weld deposits.

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Specification

Language:FORTRAN
Product form:Source code

SUBROUTINE MAP_STEEL_ELONG(NELONG,SUL,OXYPPM,VINC,RATIO)

DOUBLE PRECISION NELONG,OXYPPM,RATIO,SUL,VINC

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Description

The plastic strain of steel weld deposits can be factorised into a uniform and a non-uniform component. It is possible to express the non-uniform component in terms of the inclusion content of the weld deposits [1]. MAP_STEEL_ELONG calculates the percentage non-uniform elongation in the primary microstructure, and the volume fraction of inclusions from the following equations:


Inclusion fraction = 0.055(wt%[oxygen] + wt%[sulphur])

and
% non-uniform elongation = 100.beta.(yield strength / tensile strength),

where
beta = 1.239 - 9.372(wt%[oxygen] + wt%[sulphur]) .

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References

  1. A.A.B. Sugden and H.K.D.H. Bhadeshia, 1990, J. Mat. Sci., 25, 613.
    The estimation of non-uniform elongation in low alloy steel weld deposits.

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Parameters

Input parameters

OXYPPM - real
OXYPPM is the amount of oxygen (parts per million by weight).

SUL - real
SUL is the sulphur content (wt.%).

RATIO - real
RATIO is the ratio of yield to tensile strength.

Output parameters

NELONG - real
NELONG is the percentage non-uniform elongation in the primary microstructure.

VINC - real
VINC is the volume fraction of inclusions.

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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 NELONG,OXYPPM,RATIO,SUL,VINC
C
      WRITE (*,*) 'Input oxygen ppm,  sulphur wt%,  ratio yield to ',
     & 'tensile strength:'
      READ (*,*) OXYPPM,SUL,RATIO
      CALL MAP_STEEL_ELONG(NELONG,SUL,OXYPPM,VINC,RATIO)
      WRITE (*,1) NELONG, VINC
      STOP
    1 FORMAT ('Non-uniform elongation = ',F8.2,' %'/
     &        'Volume fraction of inclusions = ',F8.4 )
      END

2. Program data

 Input oxygen ppm,  sulphur wt%,  ratio yield to tensile strength:
 316  0.008  0.177

3. Program results

Non-uniform elongation =    15.36 %
Volume fraction of inclusions =   0.0022

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Auxiliary Routines

None.

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Keywords

elongation, inclusions, steel, weld

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Download

Download source code

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