Young’s Modulus of CMSX-4 Superalloy

The TCS Ni-based Superalloys Database (TCNI) has elastic properties included starting with version 13 (TCNI13).

This application example shows where Young’s modulus is calculated as a function of temperature for the superalloy CMSX-4.

CMSX-4 exhibits a two-phase microstructure, with γ as the matrix phase and γ’ as the strengthening precipitate. The composition used in the calculations is Ni(bal.)Al5.6Co9.0Cr6.5Hf0.1Mo0.6Re3.0Ta6.5Ti1.0W6.0 (wt.%).

To replicate the experimental conditions reported in [2021Epi], which also includes elastic property measurements, two freeze-in calculations are performed using the Property Model Calculator. The Equilibrium with Freeze-in Temperature Model that comes with the General Model Library is used.

Read more on our website about Property Models, including information about the material specific Model Libraries (i.e steel, nickel, titanium, etc.), as well as how to create your own custom models in TC‑Python. If you are in Thermo‑Calc, press F1 to search the help.

In Figure 1, the black line indicates the Young’s modulus for a microstructure frozen-in at solvus temperature (1280 °C), while the red line is frozen-in at 700 °C. The former is used to provide reference values of Young’s modulus in the absence of ordering (0 vol.% γ′). The 700 °C freeze-in temperature is selected to reproduce the 74 vol.% γ′ observed experimentally, ensuring the correct microstructure is maintained down to room temperature. The resulting Young’s modulus values from the 700 °C freeze-in calculation show good agreement with the experimental data from [2021Epi].

References

[2021Epi] A. Epishin, B. Fedelich, M. Finn, G. Künecke, B. Rehmer, G. Nolze, C. Leistner, N. Petrushin, I. Svetlov, Investigation of Elastic Properties of the Single-Crystal Nickel-Base Superalloy CMSX-4 in the Temperature Interval between Room Temperature and 1300 °C. Crystals 11, 152 (2021).