Prev Parameters Input parameters C- real array of dimension 8 C holds the composition of each alloy:- C(1) is the Carbon concentration (in weight percent).Ĭ(2) is the Silicon concentration (in weight percent).Ĭ(3) is the Manganese concentration (in weight percent).Ĭ(4) is the Nickel concentration (in weight percent).Ĭ(5) is the Molybdenum concentration (in weight percent).Ĭ(6) is the Chromium concentration (in weight percent).Ĭ(7) is the Vanadium concentration (in weight percent).Ĭ(8) is the Ferrite concentration (not entered). 1117-1130.Ĭritical Assessment of Growth of Plates in Steels, Rationalisation of Shear Transformations in Steels,Īcta Metallurgica, Vol. The maximum number of different alloys which can be analysed in a single run is set by the variableĪ thermodynamic analysis of isothermal transformation diagrams, Metal Science,īainite in Steels, Institute of Materials, London (2001), 1-450. The program will return an error message and ask for the data to be entered again if these limits are exceeded. There are maximum and minimum limits imposed on each constituent as shown :- Input The program asks for compositions (in wt.%) of seven constituents to be supplied. 2).ĭIFFTare the times in seconds of the lower and upper C-curves of the TTT diagram (Ref. XTO, but with 400 J/mol of stored energy in the ferrite, to allow calculations on bainite (Fig. XTOis the T-zero carbon concentration in mole fraction (Fig.FTOis the driving force for diffusionless transformation (Fig.XEQbut allowing for 50 J/mol of strain energy in the ferrite in order to do calculations for Widmanstatten ferrite. XEQis the paraequilibrium carbon concentration of austenite in mole fraction.XNUCLEUSis the optimum nucleus carbon concentration in mole fraction.GMAXis the driving force for nucleation (Fig.All driving forces are in units of J/mol and all calculations are for the paraequilibrium state. FPROis the driving force for allotriomorphic ferrite formation by a paraequilibrium mechanism.OUT.OUTcontains the concentrations (C, Si, Mn, Ni, Mo, Cr & V) in wt.% and mole fraction (atomic % /100). The lower C-curve is for displacive reactions such as WidmanstŠtten ferrite, bainite and acicular ferrite [ The higher temperature C-Curve is for reconstructive ("diffusional") reactions such as allotriomorphic ferrite and bainite. The TTT diagram consists of two C-curves for the initiation of transformation. ![]() This program is essential for any of the solid state phase transformations from austenite to martensite, bainite, WidmanstŠtten ferrite, allotriomorphic ferrite etc. ![]() OUT.OUTwhich is created each time the program is run. Many people use it to calculate a TTT diagram, but there is in fact an enormous amount of phase diagram and kinetic and thermodynamic information generated in the file MAP_STEEL_MUCG46 is a very powerful program for the modelling of transformations in steels. ![]() & MAP_STEEL_DCG, MAP_STEEL_ENERGY, MAP_STEEL_FTO1, MAP_STEEL_WSFUN & T10, T20, TEQ, TEQ2, V14, W, W1, WS, WS1, X, XA, X1, X44, XBAR, XEQ,ĭOUBLE PRECISION MAP_STEEL_AFEG, MAP_STEEL_CG, MAP_STEEL_DAFEG, & FPROA, FSON, FTO, GMAX, H, H1, MS, R, S, S1, SHEART, SLOPE, STRAIN, T, Department of Materials Science and Metallurgy,Ī powerful suite of software for modelling of the thermodynamics and kinetics of solid-state transformations in steels.ĭOUBLE PRECISION BDIF(40), BSH(40), BTEM(40), C(8), DFPRO(40), DDFTO(40),ĭOUBLE PRECISION A, A1, A44, AEQ, AFE, AFE44, AFEQ, AJ, AJ1, BS, CONST,
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