| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision |
| tutorials:t15 [2019/08/01 14:18] – [Interpretation of results] pwarczok | tutorials:t15 [2023/08/02 22:21] – [Setting up the simulation] pwarczok |
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| //This tutorial was tested on\\ | //This tutorial was tested on\\ |
| MatCalc version 6.00 rel 1.003\\ | MatCalc version 6.03 rel 1.000\\ |
| license: free\\ | license: free\\ |
| database: mc_fe.tdb; mc_fe.ddb// | database: mc_fe.tdb; mc_fe.ddb// |
| Create a precipitate phase **CEMENTITE_P0**, using **'Global > Phase status'**. In the **'Nucleation"** tab -> **'Controls'** subtab, change the **'Nucleus composition'** model from **'ortho-equilibrium'** to **'para-equilibrium'** using the drop-down menu. **'Para-equilibrium'** means that the nucleus is assumed to have the same composition in terms of substitutional elements as the matrix from which it forms, and only the carbon is partitioned between the two phases. In the **'ortho-equilibrium'** model, by contrast, the composition of the nucleus is calculated assuming full equilibrium with the BCC_A2 matrix. In the **'Nucleation > Sites'** tab, set the nucleation sites to **'Dislocations'** (remove the tick from 'bulk') | Create a precipitate phase **CEMENTITE_P0**, using **'Global > Phase status'**. In the **'Nucleation"** tab -> **'Controls'** subtab, change the **'Nucleus composition'** model from **'ortho-equilibrium'** to **'para-equilibrium'** using the drop-down menu. **'Para-equilibrium'** means that the nucleus is assumed to have the same composition in terms of substitutional elements as the matrix from which it forms, and only the carbon is partitioned between the two phases. In the **'ortho-equilibrium'** model, by contrast, the composition of the nucleus is calculated assuming full equilibrium with the BCC_A2 matrix. In the **'Nucleation > Sites'** tab, set the nucleation sites to **'Dislocations'** (remove the tick from 'bulk') |
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| {{:tutorials:t15:img:t15_phase_status_2017.png?650| MatCalc phase status}} | {{:tutorials:t15:img:t15_phase_status_6050006.png?650| MatCalc phase status}} |
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| In **'Global > precipitation domains'**, create a new domain named **'ferrite'** with **'BCC_A2'** as its matrix phase. Accept the changes by clicking **'OK'** to close the window. | In **'Global > precipitation domains'**, create a new domain named **'ferrite'** with **'BCC_A2'** as its matrix phase. Accept the changes by clicking **'OK'** to close the window. |
| The following images show the phase fraction, the number of precipitates (**note the log scale**) and the mean radius for dislocation densities of 1e12, 1e14 and 1e16. It can be seen that increasing the nucleation site density accelerates the reaction kinetics and results in a larger number of precipitates with a smaller mean radius. | The following images show the phase fraction, the number of precipitates (**note the log scale**) and the mean radius for dislocation densities of 1e12, 1e14 and 1e16. It can be seen that increasing the nucleation site density accelerates the reaction kinetics and results in a larger number of precipitates with a smaller mean radius. |
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| {{:tutorials:t15:img:t15_plot8_phase_fraction_dislo_2_2016.png| MatCalc plot}} | {{:tutorials:t15:img:t15_plot3_phase_fraction_6021003.png| MatCalc plot}} |
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| {{:tutorials:t15:img:t15_plot9_num_part_dislo_2_2016.png| MatCalc plot}} | {{:tutorials:t15:img:t15_plot3_num_part_6021003.png| MatCalc plot}} |
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| {{:tutorials:t15:img:t15_plot10_mean_radius_dislo_2_2016.png| MatCalc plot}} | {{:tutorials:t15:img:t15_plot3_mean_radius_6021003.png| MatCalc plot}} |
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| ===== To finish... ===== | ===== To finish... ===== |
