Effect of energy density on the microstructure and properties of the CrFeCoNiNb high-entropy cladded layer.

Autor: Song, Pengfang, Jiang, Fulin, Wang, Yuling, Yang, Fazhan, Zhong, Zhaolin
Předmět:
Zdroj: International Journal of Advanced Manufacturing Technology; 2/10/2022, Vol. 118 Issue 11/12, p3949-3962, 14p, 2 Black and White Photographs, 3 Diagrams, 6 Charts, 9 Graphs
Abstrakt: A synergistic combination of mechanical properties and corrosion resistance property is desired for most ocean engineering structural applications. In this paper, we prepared a high-entropy alloy (HEA) cladded layer of composition CrFeCoNiNb (atomic %). We aim to attain a balance between the mechanical property and the corrosion resistance property by adjusting the energy density. The prepared CrFeCoNiNb cladded layer with an energy density of 116.7 J/mm2 exhibited excellent mechanical properties and high corrosion resistance. The improved mechanical properties are attributed to fine grain strengthening, solid solution strengthening, and dispersion strengthening. Whereas, the excellent corrosion resistance is due to the formation of Laves corrosion-resistant phase structure and the compact passivation film. The variation of the mechanical properties and corrosion resistance with different energy densities are attributed to the phase composition. The proportion of the Laves phase decreases first and then increases with the increase of energy density, which is the main reason that the microhardness of the cladded layer follows a similar trend. The outcome of our research suggests that the prepared CrFeCoNiNb cladded layer could be explored to realize surface strengthening of load-bearing parts in marine engineering equipment. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje