appendices:a12
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appendices:a12 [2019/11/14 16:50] helene |
appendices:a12 [2020/08/25 15:46] (current) |
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| File number = 35 ; Generally called *IN.MET\\ | File number = 35 ; Generally called *IN.MET\\ | ||
| This *.met file is read in the Prepro by METLAW.F\\ \\ | This *.met file is read in the Prepro by METLAW.F\\ \\ | ||
| - | This file contains all the data necessary to use effectively the laws [[laws:meta|META]] and [[laws:thmet|THMET]]. It must always exist to perform a metallurgical thermal analysis. Sections [[appendices:a12#1. Title|1. Title]] to [[appendices:a12#5. Description of TTT diagram |5. Description of TTT diagram]] are repeated with increasing ILAWN if more than one steel is described. | + | This file contains all the data necessary to use effectively the laws [[laws:meta|META]], [[laws:metamec|METAMEC]], [[laws:elamet|ELAMET]], [[laws:arbthmet|ARBTHMET]] and [[laws:thmet|THMET]]. It must always exist to perform a metallurgical thermal analysis. Sections 1 to 8 are repeated with increasing ILAWN if more than one steel is described. |
| ==== 1. Title ==== | ==== 1. Title ==== | ||
| Line 13: | Line 13: | ||
| |ILAWN|Number of the steel described. This number is entered under the reference number IMETA by the law [[laws:meta|META]]| | |ILAWN|Number of the steel described. This number is entered under the reference number IMETA by the law [[laws:meta|META]]| | ||
| |IMPER|= 0 No impression\\ = 1 Impression on file number 36 generally called *IN.OUM| | |IMPER|= 0 No impression\\ = 1 Impression on file number 36 generally called *IN.OUM| | ||
| - | |NTPCA|= 8; Number of parameters in section [[appendices:a12# Characteristic temperatures (TTT + equilibrium F-C diagrams) |Characteristic temperature]]| | + | |NTPCA|Number of parameters in section [[appendices:a12# Characteristic temperatures (TTT + equilibrium F-C diagrams) |3.]] \\ = 8 for [[laws:meta|META]]; \\ = 20 for [[laws:metamec|METAMEC]]| |
| - | |NPA|= 5; Number of parameters described by polynomials (section [[appendices:a12# Parameters described by polynomials of temperature | Parameters described by polynomials of temperature]])| | + | |NPA|= 5; Number of parameters described by polynomials (section [[appendices:a12#2. Parameters described by polynomials of temperature |4.]])| |
| |NDPO|Maximum degree of polynomials (maximum value = 7)| | |NDPO|Maximum degree of polynomials (maximum value = 7)| | ||
| |NVM|= 0 No mechanical parameters described| | |NVM|= 0 No mechanical parameters described| | ||
| Line 25: | Line 25: | ||
| |IET|= 1: Definition of the tangent modulus according to the strain level for each phase and temperature| | |IET|= 1: Definition of the tangent modulus according to the strain level for each phase and temperature| | ||
| ^If IET = 1 (I5)^^ | ^If IET = 1 (I5)^^ | ||
| - | |NEPS| Number of strain level definition| | + | |NEPS| Number of strain levels| |
| __Remark:__ Some values are already defined in [[laws:meta# Integer parameters|Integer parameters]], pay attention to give the same value. Values as NTPCA, NPA, NVM, NTEMP are defined a first time automatically in LAWPRE. If you want to change these values, change also in the FORTRAN source file called LMETA.F. | __Remark:__ Some values are already defined in [[laws:meta# Integer parameters|Integer parameters]], pay attention to give the same value. Values as NTPCA, NPA, NVM, NTEMP are defined a first time automatically in LAWPRE. If you want to change these values, change also in the FORTRAN source file called LMETA.F. | ||
| Line 31: | Line 31: | ||
| ^Title (A5)^^ | ^Title (A5)^^ | ||
| |Title|TPCAR written in columns 1 to 5| | |Title|TPCAR written in columns 1 to 5| | ||
| - | ^Parameters (7G10.0)^^ | + | ^Parameters (7G10.0/7G10.0/6G10.0) - Only NTPCA parameters are read^^ |
| |$A_3$ or $A_{cm}$|$A_3$: equilibrium temperature for the beginning of the ferrite transformation\\ $A_{cm}$:equilibrium temperature for the beginning of the cementite transformation| | |$A_3$ or $A_{cm}$|$A_3$: equilibrium temperature for the beginning of the ferrite transformation\\ $A_{cm}$:equilibrium temperature for the beginning of the cementite transformation| | ||
| |$A_1$|equilibrium temperature for the eutectoïd transformation| | |$A_1$|equilibrium temperature for the eutectoïd transformation| | ||
| Line 40: | Line 40: | ||
| |AM|Coefficient of the Marburger law for the martensite transformation| | |AM|Coefficient of the Marburger law for the martensite transformation| | ||
| |FINCU|If no transformation has occurred when the temperature $B_s$ is reached, the SCHEIL's sum is multiplied by FINCU (generally FINCU = 0.0)| | |FINCU|If no transformation has occurred when the temperature $B_s$ is reached, the SCHEIL's sum is multiplied by FINCU (generally FINCU = 0.0)| | ||
| - | All the characteristic temperatures are defined on the figure below: | + | |CP_e| Values defining the shift in the diagram TTT : $D = C\ \sigma_{equivalent}$ for the ferrite and the pearlite | |
| + | |CB_a| Values defining the shift in the diagram TTT : $D = C\ \sigma_{equivalent}$ for the bainite | | ||
| + | |A| Values that gives the variation of M_s | | ||
| + | |B| $\Delta M_s = A \sigma_{moi} + B \sigma_{equivalent}$ | | ||
| + | |EXPR| $\gamma \rightarrow $ Pr | | ||
| + | |EXPE| $\gamma \rightarrow $ Pe : Dilatation due to the austenite transformation | | ||
| + | |EXBA| $\gamma \rightarrow $ Ba (the reference volume is the austenite at 0E C) | | ||
| + | |EXMA| $\gamma \rightarrow $ MA | | ||
| + | |K4=K3| Coefficient in the plasticity transformation formulae : ferrite, cementite, pearlite | | ||
| + | |K5| Coefficient in the plasticity transformation formulae : bainite | | ||
| + | |K6| Coefficient in the plasticity transformation formulae : martensite | | ||
| + | |TLIQUID| Temperature where the steel is considered to be fully liquid. Beyond this temperature, the preprocessor will automatically set the thermal dilatation coefficient to null values.\\ \textbf{Important : put an initial value even if you don't model liquid state}| | ||
| + | All the characteristic temperatures are defined on the figure below: | ||
| {{ :laws:meta.png?500 |}} | {{ :laws:meta.png?500 |}} | ||
| + | |||
| + | __Remark__ : Some additional parameters can occur depending on the steel and its plasticity transformation formula or the modification of the formula of the shift ($D=C\sigma$). If you want to change, you must adopt: | ||
| + | - NTPCA (section 2); | ||
| + | - Subroutine METLAW that read and write with comments the parameters of section 3; | ||
| + | - Subroutine ARMEA that read the great vector PAMET where are stored the parameters of section 3 and where the formulae of $D$ and $\varepsilon^{pt}$ are implemented. | ||
| ==== 3bis. If IET = 1 ==== | ==== 3bis. If IET = 1 ==== | ||
| ^Title (A5)^^ | ^Title (A5)^^ | ||
| |TITLE|STLVL in the first 5 columns| | |TITLE|STLVL in the first 5 columns| | ||
| - | ^Line 1 - repeated NEPS times (G10.0)^^ | + | ^Repeated NEPS times (G10.0)^^ |
| - | |EPS|Strain level| | + | |EPS|Values of the NEPS strain levels (variable tangent modulus)| |
| ====4. Parameters described by polynomials of temperature==== | ====4. Parameters described by polynomials of temperature==== | ||
| ^Title (A5)^^ | ^Title (A5)^^ | ||
| Line 78: | Line 95: | ||
| One must write FI followed by a blank card.\\ :!: If input parameters (temperature dependent) are given as a table, all the tables must have the same length. Otherwise, it does not work properly. | One must write FI followed by a blank card.\\ :!: If input parameters (temperature dependent) are given as a table, all the tables must have the same length. Otherwise, it does not work properly. | ||
| - | ====5. Description of TTT diagram==== | + | ==== 5. Mechanical parameters (Only for laws coupled with mechanics) ==== |
| + | - Firstly you give five letters : 'A1^A2' and NTER where : | ||
| + | * A1 defines the mechanical parameter: | ||
| + | * YOUNG modulus: YO | ||
| + | * POISSON ratio: NU | ||
| + | * Thermal dilatation: AC or AP (AC for the $\alpha$ coefficient of classical type and AP for the $\alpha$ coefficient of partial type) | ||
| + | * Yield stress $\sigma_y$: SY | ||
| + | * Plastic slope: ET | ||
| + | * If IPOLY=0: | ||
| + | * Thermal conductivity: LA | ||
| + | * Mass density: RO | ||
| + | * Heat capacity: CA | ||
| + | * Vickers hardness: HV | ||
| + | * Latent heat of transformation: TR | ||
| + | * '^' is a space; | ||
| + | * A2 defines the phase concerned; | ||
| + | * Austenite: AU (Except for A1=TR) | ||
| + | * Proeutectoïd: PR | ||
| + | * Pearlite: PE | ||
| + | * Bainite: BA | ||
| + | * Martensite: MA | ||
| + | * NTER as the number of temperature used to describe the evolution of the parameter.\\ | ||
| + | - Secondly, **ONLY IF** AC is chosen: \\ (A5,G10.0) 3 spaces and 'TO' or 'T0' \\ VALUE: Value of $T_0$ (usually $T_0$ is the room temperature so 20°C or 293K, be careful there is no default value for this parameter, so you should enter a value, otherwise the preprocessor will crash) | ||
| + | - Thirdly, you repeat NTER times: | ||
| + | * TEMPE: Temperature | ||
| + | * VALUE: Value of the parameter | ||
| + | |||
| + | __Remarks :__ | ||
| + | - No defined tables are initialized to zero | ||
| + | - A1 = FI followed by a blank card indicates the end of section 5. | ||
| + | - For the table describing ALPHA, the first temperature __must be__ zero otherwise the integration of $\int_0^{T_{\alpha}} dT$ will not be correct. \\ | ||
| + | |||
| + | __Remarks about the thermal coefficient $\alpha$:__ | ||
| + | - The $\alpha_C$ coefficient of classical type is defined by : \[\alpha_C(T) = \frac{1}{L_0}\frac{L_{(T)}-L_0}{T-T_0}\] where $L_0=L(T_0)$.\\ The $\alpha_P$ coefficient of partial type is defined by : \[\alpha_P(T)=\frac{1}{L_{(T)}}\frac{dL}{dT}\] The user could give the classical type or the partial type $\alpha$ coefficient (with AC or AP).\\ | ||
| + | - If $\alpha$ is of classical type ($\alpha_C$) : | ||
| + | * The unity, chosen by the user, of $T_0$ has to be the same as the unity of the temperatures at which the $\alpha_C$ coefficient is given. | ||
| + | * The temperatures, at which the $\alpha_C$ coefficient is given, have to be given in increasing order. | ||
| + | * It is necessary to give at least 2 values of $\alpha_C$ at two temperatures. | ||
| + | * Each $\alpha_C$ coefficient has to verify the following relation : \[1+\alpha_C(T).(T-T_0)>0\;\text{ and not equal to 0}\] | ||
| + | - If the user gives the classical type $\alpha_C$ coefficient (AC), the pre-processor will calculate the partial type $\alpha_P$ coefficient. If the user gives the partial one, the pre-processor keeps these values. In the case of the calculus of the partial type $\alpha_P$ coefficient, the following relations are used (see the file ALPHAPARTIEL.F) for given couples ($T_i,\alpha_{Ci}$) with $i=1,...,n$ : \[\alpha_{P1} = \frac{\alpha_{C1}+(T_1-T_0)\frac{\alpha_{C2}-\alpha_{C1}}{T_2-T_1}}{1+\alpha_{C1}(T_1-T_0)}\]\[\alpha_{Pn} = \frac{\alpha_{Cn}+(T_n-T_0)\frac{\alpha_{Cn}-\alpha_{Cn-1}}{T_n-T_{n-1}}}{1+\alpha_{Cn}(T_n-T_0)}\] and for $i$ such as $1<i<n$: \[\alpha_{Pi}=\frac{\alpha_{Ci}+\frac{1}{2}(T_i-T_0)\left(\frac{\alpha_{Ci}-\alpha_{Ci-1}}{T_i-T_{i-1}}+\frac{\alpha_{Ci+1}-\alpha_{Ci}}{T_{i+1}-T_i}\right)}{1+\alpha_{Ci}(T_i-T_0)}\] | ||
| + | - For more information about the $\alpha$ coefficient of classical and partial type, the reader could see the internal report N° M&S/2002-8 of the 5$^{th}$ December 2002 entitled "Comparaison des coefficients de dilatation thermique classique et partiel". | ||
| + | - An example of what the user should give is: | ||
| + | |||
| + | AC AU 5 | ||
| + | T0 0.0 | ||
| + | 0.0 10.E-06 | ||
| + | 200.0 12.E-06 | ||
| + | 400.0 16.E-06 | ||
| + | 700.0 25.E-06 | ||
| + | 900.0 30.E-06 | ||
| + | AC PE 2 | ||
| + | T0 0.0 | ||
| + | 0.0 10.E-06 | ||
| + | 900.0 30.E-06 | ||
| + | AP MA 5 | ||
| + | 0.0 30.E-06 | ||
| + | 200.0 25.E-06 | ||
| + | 400.0 16.E-06 | ||
| + | 700.0 12.E-06 | ||
| + | 900.0 10.E-06 | ||
| + | |||
| + | ====6. Description of TTT diagram==== | ||
| The three phases : Proeutectoïd (PROEU). Pearlite (PERLI) and bainite (BAINI) have to be described successively by the sections detailed hereafter. The order PROEU, then PERLI, then BAINI must be respected. | The three phases : Proeutectoïd (PROEU). Pearlite (PERLI) and bainite (BAINI) have to be described successively by the sections detailed hereafter. The order PROEU, then PERLI, then BAINI must be respected. | ||
| Line 103: | Line 181: | ||
| |PSUP|Upper percentage| | |PSUP|Upper percentage| | ||
| |NTR|Number of temperatures used to described the curve of the transformation of PINF and PSUP percent| | |NTR|Number of temperatures used to described the curve of the transformation of PINF and PSUP percent| | ||
| - | N.B.These data are used to complete n and b coefficients of the Johnson-Mehl-Avrami law\\ | ||
| - | Remark : The NTR number must be limited by the data NT1, NT2 or NT3 given in section [[appendices:a12#2. General data| General data]] for each phase (PROEU, PEARLI or BAINI)\\ | ||
| ^Repeat NTR times (3G10.0)^^ | ^Repeat NTR times (3G10.0)^^ | ||
| |TEMPE|Temperature| | |TEMPE|Temperature| | ||
| |TINF|:::| | |TINF|:::| | ||
| |TSUP|:::| | |TSUP|:::| | ||
| - | Remark2 : Do not leave an empty card at the end of the *.met. Otherwise the Prepro will expect for another material. | + | N.B.These data are used to complete n and b coefficients of the Johnson-Mehl-Avrami law\\ |
| + | __Remark 1__: The NTR number must be limited by the data NT1, NT2 or NT3 given in section [[appendices:a12#2. General data| General data]] for each phase (PROEU, PEARLI or BAINI)\\ | ||
| + | __Remark 2__: Do not leave an empty card at the end of the *.met. Otherwise the Prepro will expect for another material. | ||
appendices/a12.1573746607.txt.gz · Last modified: 2020/08/25 15:33 (external edit)
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