Special Issue "Innovations and Thermal Stability of High-Entropy Alloys"
A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".
Deadline for manuscript submissions: 20 August 2023 | Viewed by 185
Special Issue Editor
Interests: computer simulation; physical properties in materials; irradiation damage
Special Issue Information
Dear Colleagues,
According to the alloy design with multiple principal elements in the equimolar of near-equimolar ratios—high-entropy alloys (HEAs)—435,897 alloys can be synthesized, provided that 5 of the current 37 kinds of elements commonly used in the preparation of HEAs are mixed together. If the number of principals is set to 3 to 6, this number will reach 2,834,496. At present, 400 kinds of HEAs have been developed, many of which are obtained by means of adjustment according to the existing formula. However, less than 100 HEAs have actually been obtained through mixing different elements so far. This means that there is still tremendous room for exploiting HEAs. To date, many compositions have been designed and the corresponding properties have been investigated, such as mechanical properties, conductivity, electrocatalysis, and even those related to biomaterials. However, the compositions and lattice distortions of HEAs are different from each other even with the same structure, which remarkably raises the difficulty of predicting the behaviors of materials, particularly from the perspective of the micro-structure. Profound physics, which is rooted in the correlation between the intrinsic structural characteristics and properties, is still lacking a large number of journal papers that address HEAs. In addition, as the temperature decreases, the impact of the entropy on Gibbs free energy is attenuated, the chemical disorder in the matrix may be changed, or even element segregation or phase precipitation can easily occur, which may influence the stability of properties. Thus, the stability of properties with temperature should be another important issue for HEAs, different from traditional alloys whose properties are generally stable in a somehow large temperature range. In any case, the difference between local chemical environment and the lattice distortion in HEAs provide us with novel phenomena in chemistry and physics, distinct from traditional alloys. The exciting exploitation and application of these potentially novel properties are expected in future.
Prof. Dr. Yuexia Wang
Guest Editor
Manuscript Submission Information
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Keywords
- grain boundary segregation
- solid solution
- correlation between properties and micro-structure
- mechanical properties
- conductivity
- machine learning in HEAs
- application (hydrogen storage)
- biomaterials
- oxygen electrocatalysis
- superconductivity
Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Thermal stabilitie of Al5Ni5(CrxCoYFez)90 alloys between room temperature and 1200°C measured by in situ X-ray diffraction synchrotron measurements.
Authors: P. Pérez; G. Garcés; J. Medina; Paloma Adeva; M.F. Vega; M.A. Monge; N. Schell; E. Maawad
Affiliation: Departamento de Metalurgia Física, Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Avd. Gregorio del Amo 8, 28040, Madrid, Spain,
Instituto de Ciencia y Tecnología del Carbono (INCAR-CSIC), C/ Francisco Pintado Fe, 26, 33011, Oviedo, Spain
Universidad Carlos III de Madrid, Departamento de Física, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain
Structural Research on New Materials, Helmholtz-ZentrumGeesthacht Outstation at DESY, Notkestraße 85, Hamburg, 22607, Germany
Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, Geesthacht, 21502, Germany
