Abstract
Oxide dispersion strengthened (ODS) nickel-base alloys are considered to be potential candidate materials for high temperature applications in excess of 1,000 C. Their extraordinary creep resistance results from a beneficial superposition of strengthening by incoherent, finely dispersed oxide particles, which effectively interact with dislocations and of coarse, elongated grains suppressing grain boundary sliding. While these mechanisms have been convincingly discussed in the literature, the influence of texture on creep strength has not been treated equally systematically due to the lack of varying the grain orientation or texture independently on the grain structure during the final recrystallization heat treatment. The availability of appropriate material of the ODS nickel-base alloy PM 1000 (trademark of Plansee AG, Reutte, Austria) enables to investigate creep specimens taken from the same heat with different grain orientations but identical grain and particle structure. Thus, in the present work, the authors will show that texture significantly affects not only the point of maximum deformation resistance (or steady-state flow stress, respectively) but also the homogeneity of deformation.
Published Version
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