Provenance of Source Code

Kirk Skinner
Materials Engineer,
School of Mechanical, Materials and Mechatronic Engineering,
University of Wollongong,
Northfields Ave University of Wollongong NSW 2522.

Dr Murugananth Marimuthu,
School of Mechanical, Materials and Mechatronic Engineering,
University of Wollongong,
Northfields Ave University of Wollongong NSW 2522.

E-mail: kirk.skinner@bluescopesteel.com

Added to MAP: November 2012

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Purpose

A set of models "Hot Strength Properties Module" to predict the mechanical properties like Elongation, Tensile Strength and Yield Strength of ferritic power plant steels. This model can be used to predict the said properties at high temperatures upto 700 C. In order to predict creep strength one can use the Creep module here.

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Specification

Language:	C, FORTRAN, BASH Shell
Product form:	Source Code and Executables

Complete program.

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Description

This module can be used to predict the elongation, tensile strength and yield strength for ferritic power plant steels.

Follow these steps to use this module:

1. Download the file.

2. Edit the test.dat file with the variable inputs to be used in the prediction. The inputs need to be entered in the order specified here.

3. Run the model using run_model.sh.

The following files will be found within this module:

Readme.txt	Tells the name of the input variables and the order in which these are to be presented in a file named test.dat before using the model for predictions.
MINMAX	Contains the minimum and maximum ranges of each input variable.
test.dat	Contains the input variables which will be used by accessory programs to make predictions.
generate44	This is the executable file for the neural network program. It reads the normalised input data file, norm_test.in, and uses the weight files in subdirectory c, to find a value for ferrite number.The results are written to the temporary output file _out.
spec.c	Specification file to be read by generate44.
c/	Directory where weight files for use by the generate44 pertaining to each model in the committee are stored.
s/
outprdt/	Directory where the output from generate44 are written to.
committee.dat	Consists of values representing the number of models in committee and number of variables used.

Instructions to run the module

Download the module
gunzip the module using the command "gunzip MAP_STEEL_FERRITIC_HOT_MECH_PROPERTIES.tar.gz"
untar the file using "tar -xvf MAP_STEEL_FERRITIC_HOT_MECH_PROPERTIES.tar"
Change directory to MAP_STEEL_FERRITIC_HOT_MECH_PROPERTIES
Rename or copy example.dat file to "test.dat" and modify it according to your requirements (follow instructions in Readme.txt).

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References

BSCC High Temperature Data, 1973, The Iron and Steel Institute, Carlton House Terrace, London.
National Institue of Materials Science, MatNavi NIMS Materials Database, http://mits.nims.go.jp/index_en.html.
R. C. Dimitriu and H. K. D. H. Bhadeshia, 2007, Materials Science and Technology, 23, 1127.

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Parameters

Input parameters

The values must exist from left to right in individual cells.

1. C (wt%)
2. Si (wt%)
3. Mn (wt%)
4. P (wt%)
5. S (wt%)
6. Cr (wt%)
7. Mo (wt%)
8. Ni (wt%)
9. Al (wt%)
10. Cu (wt%)
11.N (wt%)
12. Co (wt%)
13. Sn (wt%)
14. V (wt%)
15. Nb (wt%)
16. Section Thickness (mm)
17. Heating temperature prior to cooling (^oC)
18. Cooling rate (0-furnace cooled, 1-air cooled, 2-oil quenched)
19. Tempering Temperature (^oC)
20. Tempering time (mins)
21. Testing Temperature (^oC)