Influence of the solute nature on the tensile behaviour land on the microstructure of gamma-phases of nickel based superalloys

The influence of solute elements such as W, Re and Ru on the tensile behavi our of the gamma -phase of nickel-based model superalloys is examined. Usin g macroscopic tensile tests which were carried out at different temperature s as well as post mortem TEM observations, it is shown that the characteris tics of the alloys are similar. However some differences are stressed and d iscussed in terms of differences in the nature of solute atoms. The existen ce and the vanishing of dislocation pile-ups as well as paired dislocations as a function of temperature is discussed.