Special Issue "High Entropy Alloys"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: 31 December 2018
The search for new materials with improved properties, as we all know, never stops. High Entropy Alloys (HEAs) are among the new and promising material groups, alloys, that have been attracting attention since the beginning of the 21st Century.
Historically, alloys have consisted of one, sometimes two, or even three, major elements, together with minor ones. HEAs, in contrast, contain at least five principal elements in equal, or near equal atomic percentage.
HEAs are known for their attractive physical and mechanical properties. It should be noted that some HEAs show unique properties, such as high-strength at room temperature, as well as at elevated temperatures. Their room temperature yield strength can vary from 300 MPa for FCC-structured alloys to about 3000 MPa for BCC-structured alloys. As for elevated temperatures, some refractory HEAs can sustain their high specific strength up to 1800 K. Certain HEAs also possess both high fatigue resistance and high wear resistance. Other HEAs exhibit excellent paramagnetic, ferromagnetic and soft magnetic properties together with high irradiation resistance and high corrosion resistance. Four core effects are responsible for the superior properties of some HEAs: the high mixing entropy effect, the sluggish diffusion effect, the lattice distortion effect and the cocktail effect, which says that the properties of HEAs cannot just be taken from averaging the properties of the constituting elements.
HEAs have potentially a wide range of applications, such as in functional and structural materials. Among many other applications one can mention their potential in the nuclear and at the aerospace industries, as well as in the production of heat-resistant and wear-resistant coatings and joining processes.
It is my pleasure to invite you to submit manuscripts on the subject of HEAs for this Special Issue. Full papers, communications, and reviews are all welcome.
Prof. Michael Regev
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.
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High Entropy Alloys
Elevated temperature properties