Gamma Prime Stability in Haynes 282: Theoretical and Experimental Considerations
Source abstract
Abstract
The life cycle requirements for advanced Ni alloys are very demanding and can be on the order of several hundreds of thousands of hours. Results are presented on a wrought Ni-based superalloy designed within the nominal chemistry range of Haynes 282 with a fixed amount of γ′ strengthening phase, and either low Al or Ti (within the alloy specification) to give different ratios of Ti/Al, and thus, different γ′ misfit with the γ matrix. The effect that these changes have on the γ′ misfit and its relevance to long-term microstructural stability is being explored both experimentally as well as with computational modeling with results through almost 10,000 h. The basics of the modeling approach are presented as are the procedures for evaluating the γ′ volume fractions from transmission electron microscopy (TEM) micrographs and correcting these volume fractions for truncation error due to TEM foil thickness. Results on each alloy formulation are compared and discussed with respect to possible γ′ coarsening due to the different Ti/Al ratio and what this might mean for the long-term stability of the alloy.
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Research context
OpenAlex topics: High Temperature Alloys and Creep · Advanced Materials Characterization Techniques · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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