Special Issue "Superalloys–Currents Trends in Development of Their Microstructure and Properties"
Deadline for manuscript submissions: 31 May 2020.
Interests: aerospace materials; superalloys; heat-resisting layers; thermal barrier coating; single crystal casts
Superalloys are metallic alloys (nickel-, cobalt- and iron-based) capable of being used at high temperatures, often in excess of 0.7 of their absolute melting temperature. Since the 1950s, their development has led to significant increases in operating temperatures—from about 750 to 1050 ºC. This was possible by modification of their chemical compositions (e.g., addition of Rare Earth elements) and manufacturing processes (investment casting, single-crystal production). The efficiency of this approach seems to have been much lower in last two or three decades, and surface treatment methods became the primary means for increasing hot corrosion resistance of structural elements made of superalloys. Independent of surface engineering achievements, the role of substrate materials is incontestable, especially in terms of the assurance of adequate creep resistance.
The main role of alloying additions in superalloys is to develop thermally-stable microstructures containing optimal volume fractions of phase constituents, e.g., γ’ hardening precipitates in nickel-based superalloys. Another tool in the microstructure development process is heat treatment, mainly precipitation strengthening. Proper selection of conditions requires knowledge of phase transformations kinetics, which requires the application of advanced material examination methods. An important achievement in the field of superalloy casting was the application of directional solidification. It is generally accepted that single-crystal casts exhibit much better creep resistance compared with polycrystalline ones. In the case of turbine blades, it is crucial to know how to obtain the optimal crystal orientation and evaluate its performance.
The scope of this forthcoming Special Issue will focus on recent innovative and pioneering works in the field of metallurgy and processing, structure and microstructure examination, and the development of the operational properties of superalloys.
I invite our colleagues to submit a manuscript to this Special Issue, which can be in the form of a full research paper, communication, or review.
Prof. Jan Sieniawski
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- directional solidification
- microstructure characterization
- creep resistance