CCT diagram of Ni-14Al (at%) Alloy

Purpose: Learn to calculate the CCT curve of a given alloy.

Module: PanEvolution

Thermodynamic and Mobility Database: AlNi_Prep.tdb

Kinetic Parameters Database: Ni-14Al_Precipitation.kdb

Batch file: Example_#3.7.pbfx

Calculation Procedures:

  • Create a workspace and select the PanEvolution module following Pandat User's Guide: Workspace ;

  • Load AlNi_Prep.tdb following the procedure in Pandat User's Guide: Load Database;

  • Click on PanEvolution/PanPrecipitation on the menu bar and select "Load KDB or EKDB", then select the Ni-14Al_Precipitation.kdb;

  • Click on PanEvolution/PanPrecipitation on the menu bar and click "CCT Simulation". A dialog will pop out as shown in Figure 1, In this dialog, user needs to input the alloy chemistry (left), temperature range, cooling rate range and step (bottom right) and the Target volume fraction (top right).

Figure 1:  Setup a calculation of CCT curve for Ni-14Al (at%) alloy

Post Calculation Operation:

Information obtained from this calculation:

  • Figure 2 shows the default plot from the calculation. On this diagram, the green lines are the cooling curves with different cooling rate, the blue line is the CCT curve represents the temperature when 0.2 vol% of L12_Fcc phase is precipitated under different cooling rates.

  • Perform another calculation for 1% and merge the two plots as shown in Figure 3;

  • Details on the time, temperature and fraction of precipitate can be found in the Default table;

Figure 2:  CCT curve for Ni-14Al (at%) when 0.2% of L12_FCC is precipitated under different cooling rates.

Figure 3:  Comparison of CCT curves for Ni-14Al (at%) when 0.2% or 1% of L12_FCC precipitated under different cooling rates