Superalloy—Microstructural Characterization of Ni-Based Superalloys
A special issue of Metals (ISSN 2075-4701).
Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 3542
Special Issue Editor
Interests: Ni-based alloys; austenitic and ferritic steel; light alloys (e.g., aluminum alloys and magnesium alloys); catalysts; extreme environments; scanning transmission electron microscopy; in situ S/TEM
Special Issue Information
Dear Colleagues,
As the Guest Editor for Metals, I am pleased to announce, a Special Issue focusing on the application of state-of-the-art microstructural characterization of Ni-based superalloys. To meet the demand for new or enhanced high-temperature structural materials that operate at higher temperatures and pressures with improved efficiency, Ni-based superalloys are superior candidates. Their development began over 80 years ago and was mainly driven by various parts in gas turbines used in aerospace, marine propulsion, gas/oil industry, and electricity generation. Ni-based superalloys are known to exhibit a good balance of mechanical properties (strength, fatigue, creep resistance) and high-temperature oxidation resistance due to their excellent long-term microstructural stability at high temperatures. Coincident with alloy development there is a need to develop and apply state-of-the-art characterization techniques aimed at characterizing the microstructure at length scales down to the atomic level, so that correlations between the microstructure, mechanical properties, oxidation behavior, and performance can be determined. We can directly study the effect of increasing Ni3(Al,Ti) (γ') volume fractions, γ' solution temperature, effect of solid solution strengthening elements on g/γ' lattice parameter mismatch, effect of other elemental additions or rare earth metals on the interfaces and deformation mechanisms during deformation at high temperatures. Further, advanced microstructural characterization allows for site-specific studies of interphases formed during rejuvenation, advanced joining, or fabrication (additive manufacturing, casting, forging, or heat treatments).
Papers may present experimental or theoretical studies and should focus on materials microstructural evolution under high temperature and/or pressure exposure with a focus on interfaces, deformation mechanisms, alloying segregations, void formations, crack penetration, detrimental phase formation, carbide evolution, and so on. Contributions on the effect of joining/processing technics and microstructural simulation of Ni-based alloys under extreme conditions are also welcome. All submitted contributions are subject to a strict peer review process and the decision for publication is always based on the recommendations of independent experts.
Dr. Kinga A Unocic
Guest Editor
Manuscript Submission Information
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Keywords
- Ni-based Superalloys
- γ′ particles
- grain boundaries
- partitioning of solid solution elements
- carbides
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