The influence of texture on the creep behaviour of the ods nickel-base alloy pm 1000

Creep Behavior and Damage of Ni-Base Superalloys PM 1000 and PM 3030

“…[44] D. Normalized Norton Plots, Deformation, and Damage Mechanisms A convenient method to assess creep deformation mechanisms is to use a normalized representation of the Norton plot, in which the strain rate is temperature compensated by normalizing it by the diffusion coefficient D and plotted vs the creep stress normalized by the appropriate modulus of elasticity E. [26] Using the volume diffusion coefficient D V (=D 0,V exp(ÀQ V,Nickel /(RT)) calculated with the activation energy for self-diffusion of nickel (Q V,Nickel = 285 kJ/mol [11] ), the data of PM 1000 for all test temperatures and stresses can be approximately fitted to a single trend line similar to those of Nimonic 75 that fit into a second trend curve at lower stresses, as shown in Figure 7(a). A similar observation was made by Heilmaier et al [45] using a fit value for the activation energy of 300 kJ/mol, which is close to that for volume diffusion. Furthermore, previous investigations on PM 1000 and similar alloys [5,6,16,[26][27][28][46][47][48] suggested that their creep behavior is primarily controlled by dislocation processes such as (local or general) climb over dispersoids and thermally activated detachment from the backside of oxide particles.…”

Morphology and texture evolution of FeCrAlTi–Y2O3 foil fabricated by EBPVD

“…The texture types of ODS alloys fabricated by MA method have been extensively explored and are found to significantly influence the creep behavior of the material and bring into plastic anisotropy [12][13][14][15][16]. It is reported that at 900°C and strain-rates of above 10 −5 s −1 the tensile strength of alloy with b111N texture is about 30% higher than that of an alloy with b100N texture [16].…”