Abstract
MoTaNbVTi refractory high entropy alloy was synthesized by the vacuum arc melting technique in its equi-atomic composition. The modification of its microstructural features along the vertical cross-section of the sample was associated with undercooling phenomena and the release of heat of fusion. The examined system exhibited high micro and macro-hardness values, while concerning its compression tests, it presented an improved mechanical behavior compared with other refractory systems studied, ensuring the highest ductility values. In terms of sliding wear response, the use of a metallic counterbody partner combined with the increase in sliding distance, led to possible thermal fatigue effects, while the presence of a ceramic counterbody ball was associated with the lubrication action of the formed oxides and the improvement of the alloy’s tribological response, as the sliding distance increased.
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Poulia, A., Georgatis, E. & Karantzalis, A. Evaluation of the Microstructural Aspects, Mechanical Properties and Dry Sliding Wear Response of MoTaNbVTi Refractory High Entropy Alloy. Met. Mater. Int. 25, 1529–1540 (2019). https://doi.org/10.1007/s12540-019-00283-6
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DOI: https://doi.org/10.1007/s12540-019-00283-6