Temperature dependence of the elastic moduli of the nickel-base superalloy CMSX-4 and its isolated phases

Elastic constants of anisotropic cubic materials were determined by acoustic resonance measurements at temperatures ranging from RT to 1300 K. The temperature dependence of Youngʹs modulus E, shear modulus G, and Poissonʹs ratio ν of superalloy CMSX-4 and its isolated γ′ and matrix phases were measured and compared with room temperature ultrasonic speed measurements. The orientation dependence of the engineering constants E, G and ν was determined. A comparison to models in literature predicting γ′ morphology changes during creep is presented and agreement is found with the experimental data measured in this work.