Next Article in Journal
Systematic Performance Comparison of Fe3+/Fe0/Peroxymonosulfate and Fe3+/Fe0/Peroxydisulfate Systems for Organics Removal
Previous Article in Journal
Hydrothermal Liquefaction of Biomass as One of the Most Promising Alternatives for the Synthesis of Advanced Liquid Biofuels: A Review
Previous Article in Special Issue
Correlations of Geometry and Infill Degree of Extrusion Additively Manufactured 316L Stainless Steel Components
 
 
Article

TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals

1
Faculty of Advanced Technologies and Chemistry, Military University of Technology, Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
2
GeniCore Sp. z o.o., Wolczynska 133, 01-919 Warsaw, Poland
3
Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland
4
Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Juan Manuel Montes Martos and Fátima Ternero Fernández
Materials 2021, 14(18), 5285; https://doi.org/10.3390/ma14185285
Received: 12 August 2021 / Revised: 9 September 2021 / Accepted: 11 September 2021 / Published: 14 September 2021
High-entropy alloys (HEA) are a group of modern, perspective materials that have been intensively developed in recent years due to their superior properties and potential applications in many fields. The complexity of their chemical composition and the further interactions of main elements significantly inhibit the prediction of phases that may form during material processing. Thus, at the design stage of HEA fabrication, the molecular orbitals theory was proposed. In this method, the connection of the average strength of covalent bonding between the alloying elements (Bo parameter) and the average energy level of the d-orbital (parameter Md) enables for a preliminary assessment of the phase structure and the type of lattice for individual components in the formed alloy. The designed TiCoCrFeMn alloy was produced by the powder metallurgy method, preceded by mechanical alloying of the initial elementary powders and at the temperature of 1050 °C for 60 s. An ultra-fine-grained structured alloy was homogenized at 1000 °C for 1000 h. The X-ray diffraction and scanning electron microscopy analysis confirmed the correctness of the methodology proposed as the assumed phase structure consisted of the body-centered cubic (BCC) solid solution and the C14 Laves phase was obtained. View Full-Text
Keywords: HEA; solid solution; laves phase; U-FAST sintering HEA; solid solution; laves phase; U-FAST sintering
Show Figures

Graphical abstract

MDPI and ACS Style

Gorniewicz, D.; Przygucki, H.; Kopec, M.; Karczewski, K.; Jóźwiak, S. TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals. Materials 2021, 14, 5285. https://doi.org/10.3390/ma14185285

AMA Style

Gorniewicz D, Przygucki H, Kopec M, Karczewski K, Jóźwiak S. TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals. Materials. 2021; 14(18):5285. https://doi.org/10.3390/ma14185285

Chicago/Turabian Style

Gorniewicz, Dominika, Hubert Przygucki, Mateusz Kopec, Krzysztof Karczewski, and Stanisław Jóźwiak. 2021. "TiCoCrFeMn (BCC + C14) High-Entropy Alloy Multiphase Structure Analysis Based on the Theory of Molecular Orbitals" Materials 14, no. 18: 5285. https://doi.org/10.3390/ma14185285

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop