The Structure and Mechanical Properties of FeAlCrNiV Eutectic Complex Concentrated Alloy
Josef Pešička, Jozef Veselý, Robert Král, Stanislav Daniš, Peter Minárik, Eliška Jača, Jana Šmilauerová
TL;DR
This paper studies the microstructure and mechanical properties of a FeAlCrNiV eutectic alloy in as-cast and annealed states, finding consistent structures and high strength at high temperatures.
Contribution
The study reveals the crystallographic coherence and exceptional mechanical properties of a FeAlCrNiV eutectic alloy after annealing.
Findings
The as-cast and annealed states of FeAlCrNiV alloy show similar microstructures with eutectic features.
The alloy exhibits high yield stress (820 MPa) and plasticity (25%) at 800 °C.
The microstructure consists of coherent bcc matrix, B2 laths, and spheres with structural variations in adjacent regions.
Abstract
In this work, the microstructure and mechanical properties of the FeAlCrNiV complex concentrated alloy (CCA) were studied in the as-cast and annealed states. The material was annealed at 800 °C for 16 days to test microstructure stability and phase evolution. It was found that the microstructure does not differ in the two investigated states, and the results of differential scanning calorimetry and dilatometry showed that there is almost no difference in the thermal response between the as-cast and annealed states. Both investigated states exhibit eutectic structure with bcc solid solution and ordered phase with B2 symmetry. In a single grain, several regions with B2 laths in the bcc matrix were observed. Inside the B2 laths and in the bcc matrix, bcc spheres and B2 spheres were observed, respectively. All three features—laths, matrix and spheres—are fully crystallographically coherent.…
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Taxonomy
TopicsHigh Entropy Alloys Studies · Intermetallics and Advanced Alloy Properties · High-Temperature Coating Behaviors