Characterization and Processing of Creep and Oxidation Resistant Metallic Alloys

High-temperature creep and oxidation-resistant metallic alloys represent an important group of materials. Their primary applications are gas turbines for aircraft, gas or steam turbines for power generation, pull rods and tooling for high-temperature testing machines, etc. Reactor steels for upcoming fission or fusion reactor generations represent yet another specific category. These materials can be processed using various technologies. The most common techniques are casting or powder metallurgy, which are followed by hot forging, rolling, rotary swaging, extrusion, and other possible consolidation methods such as hot isostatic pressing, spark plasma sintering, and additive manufacturing, which has gained high importance recently. There is still a high demand to push these alloys to their physical limits, this can be achieved by optimizing chemical composition and processing, which leads to attaining the desired microstructure and mechanical properties.

The aim of this Research Topic is to bring together papers that address the relationship between processing, microstructure and mechanical properties of metallic alloys, metal matrix composites and coatings for high-temperature applications. Improvements in material processing such as optimization of chemical composition, purity, consolidation techniques, thermo-mechanical treatments and other factors can lead to desired changes in the microstructure and subsequently, improvements in mechanical properties under high-temperature conditions. We expect to see contributions aiming at attaining creep-resistant alloys, for which it is key to aim at long-term stability of the microstructures at high temperatures and applied stress. Theoretical and experimental works that are able to demonstrate an apparent improvement in the resulting mechanical properties of the materials under investigation are particularly welcome.

This Research Topic welcomes the submission of Original Research Articles, Full Review Articles, Mini-Review Articles and Perspective articles in the following areas of processing-microstructure-mechanical properties relationship:

· Nickel or Cobalt based superalloys

· Oxide dispersion strengthened alloys

· Reactor steels

· High entropy alloys

· Inter-metallics

· Titanium alloys

· Magnesium alloys

· Aluminum alloys

· Metal matrix composites

· Protective coatings

Keywords: Materials environmental degradation, metallic alloys, metal matrix composite, material processing, coatings, creep, oxidation

Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.