Microstructural characterization of a new mechanically alloyed Ni-base ODS superalloy powder

In situ decomposition of Ti2AlN promoted interfacial bonding in ZnAl-Ti2AlN biocomposites for bone repair

“…It could analyze the elemental composition of particles with a diameter of 1 μm. And the WDS was used to accurately quantify the elemental composition of material [40][41][42]. The FE-EPMA-WDS results were shown in figure 3.…”

Evaluation of Processing Conditions on the γ′ Morphology of an Oxide Dispersion Strengthened Ni‐Based Superalloy

“…The lattice misfit between γ and γ 0 at about 1000 C for this superalloy was measured to be %0.16%. [21] This low value of lattice misfit indicates a very good coherency between the γ and γ 0 structures. To evaluate the effect of aging treatments on hardness, the Vickers microhardness of the ODS Ni-based superalloy powder after different heat treatment regimes is shown in Figure 5.…”

“…Though the preliminary investigations of γ 0 morphology in MAed Ni-based ODS superalloy powder showed nanoscale γ 0 lamellae forms along the elastically soft [100] direction to minimize the elastic strain energy which was attributed to the effect of severe plastic deformation by mechanical alloying, [21,30] the current study indicates that the nanostructure lamellar morphology of γ 0 is stable in all subsequent processing steps of hot extrusion, zone annealing, and heat treatments with γ 0 lamellae of ð011Þ planes in different directions. To specify any variation of chemical composition, the BF and the high-angle annular dark-field (HAADF)-STEM images with the corresponding analysis map of different elements (Ni, W, Cr, C, Al, Y, Hf, O, Fe) are shown in Figure 13.…”

“…[20] Recently, we characterized a new morphology of γ 0 phase as the nanoscale lamellar structure in a new developed mechanically alloyed (MAed) ODS superalloy. [21] In early investigations, the γ 0 lamellae was attributed to mechanical alloying aligned preferentially along the elastically soft [100] direction to minimize the elastic strain DOI: 10.1002/adem.202000559 Herein, the evolution of the microstructure of a newly developed oxide dispersion strengthened (ODS) Ni-based superalloy with emphasis on γ 0 morphology during different processing conditions is investigated. X-ray analysis of severely deformed mechanically alloyed (MAed) powders shows that the as-milled nanosized crystallite size increases with annealing associated with the sharp drop of dislocation density.…”

“…Furthermore, some small peaks also appear after annealing temperature higher than 1000 C which are related to the precipitation of Y 2 Hf 2 O 7 oxide particles. [21] Based on the XRD data, the change in the crystallite size and dislocation density are obtained during different annealing conditions, as shown in Figure 2. It is shown that by increasing annealing temperature, the crystallite size increases gradually from 15 nm in the as-milled condition to %77 nm after annealing at 1200 C. Then, increasing the annealing temperature to 1300 C results in a sharp increase in crystallite size to 277 nm, probably due to coarsening of oxide particles.…”