  The mechanical response of Haynes 282, a wrought gamma prime strengthened
nickel based superalloy, is tailored by using both a cold deformation
processing and a post straining heat treatment including a two step aging. In
this work, the effect of the applied cold pre deformation by conventional equal
speed rolling ESR or differential speed rolling DSR methods on the aging
behavior of Haynes 282 superalloy, is examined for the first time. For this
reason, the solid solution annealed alloy was subjected to 50 pct. nominal cold
thickness reduction by either ESR or DSR methods, followed by a two step heat
treatment at 1010C for 2h and 780C for 8h. The material structural evolution on
each processing step was characterized by using scanning electron microscopy,
electron backscatter diffraction and transmission electron microscopy methods.
Corresponding mechanical properties were examined in static tensile tests
performed on non standard miniaturized specimens. It was found that, the
introduction of a shear strain by rolls speed differentiation in the cold
rolling process results in a more efficient strain hardening of the alloy in
the as deformed state and an intensive grain refinement upon the post
deformation annealing. Consequently, the DSR provides a higher room temperature
mechanical strength obtained in both aging steps, as compared to the non
deformed and conventionally cold rolled counterparts. Furthermore, noticeable
differences in terms of stability of crystallographic orientations for ESRed or
DSRed and heat treated alloy, were noted.
