H.K.D.H. Bhadeshia,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.
Added to MAP: June 1999.
To calculate the ferrite lattice parameter at room temperature of an alloy steel.
Language: | FORTRAN |
Product form: | Source code |
MAP_STEEL_FERR is used in the analysis of the transformation from austenite to ferrite. It calculates the lattice parameter of the ferrite phase at room temperature (25°C), using equation 1 in reference 1, given the mean concentrations of C, Si, Mn, Ni, Mo, Cr and V in the material and the C concentration in the ferrite:
where xi is the mole fraction of element i in the ferrite and aFe (nm) is the lattice parameter of pure iron at room temperature. The concentrations of the solute elements other than C are assumed to be evenly distributed between the phases. The effect of molybdenum is derived from reference 2, the vanadium coefficient is from reference 3 and the expansion due to carbon is taken from reference 4. A value of 2.8664 Å for pure iron is given by reference 5.
None.
No information supplied.
The remaining wt.% of the steel is assumed to be iron. The calculations of the solute atom concentrations assume that the C concentration is small.
DOUBLE PRECISION C,SI,MN,NI,MO,CR,V,CALP,PFE,P PFE = 2.8664D-10 WRITE(*,*) 'Input C Si Mn Ni Mo Cr V wt%:' READ (*,*) C,SI,MN,NI,MO,CR,V WRITE(*,*) 'Input C concentration dissolved in ferrite (wt%):' READ (*,*) CALP CALL MAP_STEEL_FERR(C,SI,MN,NI,MO,CR,V,CALP,PFE,P) P = P * 1D10 WRITE (*,1) P 1 FORMAT ('Ferrite lattice parameter at 298K = ',F8.5,' Angstroms') STOP END
Input C Si Mn Ni Mo Cr V wt%: 0.05 0.5 1 0 0 0.01 0 Input C concentration dissolved in ferrite (wt%): 0.02
Ferrite lattice parameter at 298K = 2.86731 Angstroms
None.
ferrite, lattice parameter
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