Towards novel in-situ composites: MAB nanolaminate-reinforced FCI quasicrystal in multi-phase aluminum alloys
Source abstract
Abstract
A range of new in situ composites with prospective application for low-density ballistic shielding was investigated. The beneficial mechanical properties will come from the co-existence of two phases: impact-resistant face-centered icosahedral (FCI) and Fe2AlB2. The aim of the current study was the investigation of phase equilibria in Al-Cu-Fe-B system. Each of the elements in Al-Cu-Fe base alloy was doped with boron and the alloys were produced by means of suction casting. The composition impact on microstructure, accompanying phases identification and hardness were discussed in detail. The compositional FCI phase stability area was found to be smaller than predicted from atomic size constraint imposed by Hume-Rothery criteria for ternary system. Primary phases were Fe2AlB2 or Fe4Al13 in B-doped alloys. It was found that atomic positions of B in Fe2AlB2 phase can be occupied by Cu, what opens new route of tailoring its properties. B:Fe and B:Cu substiution in the 4–10 at% range promotes the growth of AlB2 phase from small tabular precipitates to long needles, what is correlated with the reduction of overall hardness. B:Al substitution leads to progressive increase in thickness of Fe2AlB2 lamellae that accompanies the hardness improvement. It was found that dominant factor contributing to overall alloy hardness was the shape of reinforcing Ψ and ζ grains rather than volume fraction of constituent phases.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Quasicrystal Structures and Properties · Microstructure and mechanical properties · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
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