Measuring Young’s modulus of Ni-based superalloy single crystals at elevated temperatures through microindentation

This study reveals that the instrumented indentation testing technique is a powerful tool for extracting Young’s modulus at high temperatures in advanced materials available only in small quantities due to cost or processing challenges. Young’s modulus, Es, of the Ni-based superalloy single crystal CMSX-4 is evaluated by the Oliver–Pharr method at temperatures from 298 to 1073 K. The Es values near to the 〈1 0 0〉 direction are 156 GPa at 298 K and 106 GPa at 1073 K. In the 〈1 1 0〉 direction, the Es values are 225 GPa at 298 K and 173 GPa at 1073 K. These results are in good agreement with those of conventional resonant frequency measurements, cited from some sources.