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The Effect of Molybdenum on the Alloy Properties of the CoCrNiFeMnNb System
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Author(s): Svetlana Kvon (Abylkas Saginov Karaganda Technical University, Kazakhstan), Vitaliy Kulikov (Abylkas Saginov Karaganda Technical University, Kazakhstan), Olegas Černašėjus (Vilnius Gediminas Technical University, Lithuania)and Yevgeniy Skvortsov (Abylkas Saginov Karaganda Technical University, Kazakhstan)
Copyright: 2026
Volume: 14
Issue: 1
Pages: 20
Source title:
International Journal of Surface Engineering and Interdisciplinary Materials Science (IJSEIMS)
Editor(s)-in-Chief: J. Paulo Davim (University of Aveiro, Portugal)
DOI: 10.4018/IJSEIMS.404001
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Abstract
The authors studied the influence of Mo and C on the properties of the CoCrNiFeMnNb alloy system. Quasi-high-entropy alloys (QHEAs) were smelted by partially using ferroalloys in the charge, unlike classical high-entropy alloys (HEAs). The Mo content was 2 and 4% mass. The C content was 0.45% mass in the experimental alloys. The C content was determined based on the initial content in the charge. The experimental alloy microstructure was represented by a solid FCC-type solution; Laves phases of various compositions; Me1Me2-type intermetallics; carbides Nb0.8, Cr0.2C, and Mo0.5NbC; and μ-phase NbCo2. All experimental alloys had higher hardness, strength, and wear resistance than the alloy without Mo and C. Increasing the Mo content in the alloy to 4% mass increased the hardness and, in particular, the wear resistance of the alloy. Strengthening the alloy with elements Mo and C is associated with forming a finer grain. Grain growth was limited by implementation phases, as well as dispersion strengthening due to solid implementation phases of various origins being formed.
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