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tutorials:t20 [2019/08/13 17:56] – [Grain growth of supersaturated Fe-matrix - solute drag effect] pwarczoktutorials:t20 [2023/08/18 13:13] – [Grain growth of pure Fe-matrix] pwarczok
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 //This tutorial was tested on\\ //This tutorial was tested on\\
-MatCalc version 6.01 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//
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 Next, in the **'MS Evolution'** tab select the **'Grainstructure'** sub-tab. By default, the evolution model for grain size is set to **'None - no evolution'**. This is the option that has been used in all kinetic simulations so far; the grain size, as well as other microstructural parameters such as dislocation density, has been taken as constant. Instead, set this to **'Single class model'**. A set of options will appear as shown in the diagram below. Leave the values with default settings and click on 'OK' button.  Next, in the **'MS Evolution'** tab select the **'Grainstructure'** sub-tab. By default, the evolution model for grain size is set to **'None - no evolution'**. This is the option that has been used in all kinetic simulations so far; the grain size, as well as other microstructural parameters such as dislocation density, has been taken as constant. Instead, set this to **'Single class model'**. A set of options will appear as shown in the diagram below. Leave the values with default settings and click on 'OK' button. 
  
-{{:tutorials:t20:img:t20_precipitation_domains_msevol_grainstructure_6011003.png?650|}}+{{:tutorials:t20:img:t20_precipitation_domains_msevol_grainstructure_6050006.png?650|}}
  
 Using **Calc > precipitation kinetics**, set up an isothermal simulation with an end-time of 3600 s (1 hour) and a temperature of 900°C. Click on **'Go'**. The simulation will be over very rapidly compared to precipitation simulations. Using **Calc > precipitation kinetics**, set up an isothermal simulation with an end-time of 3600 s (1 hour) and a temperature of 900°C. Click on **'Go'**. The simulation will be over very rapidly compared to precipitation simulations.
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 {{:tutorials:t20:img:t20_grain_growth_prec_pinning_6021003.png?650|}} {{:tutorials:t20:img:t20_grain_growth_prec_pinning_6021003.png?650|}}
  
-A further decrease of the grain rate can be observed, once the precipitate phase is present. On the first sight, one might get an impression that the effect of the precipitates is not that big. However, it must be remarked that the precipitates were created in this simulation and phase fraction of these has a minor value of 4e-6 after one hour, compared to around 4e-4 in equilibrium at this temperature. The difference in the grain sizes gets more and more significant, as the amount of precipitates increases, which can be observed for the increased tempering times.+A further decrease of the grain rate can be observed, once the precipitate phase is present. On the first sight, one might get an impression that the effect of the precipitates is not that big. However, it must be remarked that the precipitates were created in this simulation and phase fraction of these has a minor value of almost 4e-6 after one hour, compared to around 4e-4 in equilibrium at this temperature. The difference in the grain sizes gets more and more significant, as the amount of precipitates increases, which can be observed for the increased tempering times.
  
  
tutorials/t20.txt · Last modified: 2023/08/18 13:37 by pwarczok
 
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