Microstructure-sensitive creep models for nickel-base superalloy single crystals

Microstructure-sensitive creep models have been developed for Ni-base superalloy single crystals. Creep rupture testing was conducted on fourteen single crystal alloys at two applied stress levels at each of two temperatures, 982 and 1093 °C. The variation in creep lives among the different alloys could be explained with regression models containing relatively few microstructural parameters. At 982 °C, γ−γ′ lattice mismatch, γ′ volume fraction,...