Multiscale-phase-driven strength-ductility synergy in Fe3Cr2CoNiAlx high entropy alloys
Source abstract
Abstract
Fe 3Cr 2CoNiAl x (x = 0.6, 0.7, 0.8, 1.0, 1.1, 1.2) high entropy alloys (HEAs) with dual-scales B2 precipitated were prepared. The microstructure changed from face-centered-cubic (FCC) and body-centered-cubic (BCC) to a single BCC structure with the increasing of Al content. By controlling the concentration of Al element in the BCC-based HEAs, the structure can be tuned to two coherent BCC phases: medium B2 (m-B2) precipitates with an average length of 200–300 nm and smaller size B2 (s-B2) precipitates with an average diameter of 10–50 nm. The compression tests indicated that the Fe 3Cr 2CoNiAl 1.2 HEA exhibited excellent compression properties, which yield strength and fracture strain is 1464 MPa and 20%, respectively. Furthermore, the strengthening mechanism has been discussed, and it is determined that the main strengthening mechanism was precipitation strengthening. This work provides a useful mean by tailoring multi-scale phase to achieve excellent properties in BCC-based high entropy alloys.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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