High temperature nanoindentation of a Re-bearing single crystal Ni-base superalloy

Nanoindentation studies of single crystal Ni-base superalloy CMSX-4 oriented in the 〈0 0 1〉 and 〈1 1 0〉 directions were conducted over a range of temperatures from 303 to 673 K. The creep compliance at peak load was measured at each of the test temperatures and incorporated into the contact mechanics analyses to calculate the elastic modulus of CMSX-4 as a function of temperature. The measured variations in hardness and modulus as a function of temperature determined via nanoindentation are consistent with previously reported values.