The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
Structural-disorder and its effect on mechanical properties in single-phase TaNbHfZr high-entropy alloy
Abstract
Equiatomic TaNbHfZr refractory high-entropy alloys (HEAs) were synthesized by arc-melting. The HEAs were annealed at 1800{\deg}C for different times, at maximum up to 8 days. Their on average body-centered cubic (bcc), solid-solution structure was confirmed by X-ray (XRD) and neutron (ND) diffraction, respectively. The HEAs are characterized by high average values of the static atomic displacements from the ideal lattice positions and the local internal strain. The short-range clustering (SRC) of a subset of atoms, enriched in Hf and Zr takes place perpendicular to the directions. Furthermore, it becomes increasingly interconnected as a function of the annealing time. This is revealed by the evaluation of diffuse XRD intensities, high-resolution transmission electron microscopy (HRTEM) images, and atom probe tomography (APT). The local structural disorder and distortions at the SRC were modeled by molecular dynamics (MD) relaxations. The hardness and compressive yield strength of the as-cast HEA is found to be many times of what can be expected from the rule of mixture. The yield strength further increases by 76 % after 1 day of annealing, which can be explained by a strengthening mechanism resulting from the SRC. With further annealing to 4 days, a minor phase with hexagonal close packed (hcp) structure and rich in Hf and Zr nucleates at the larger connecting nodes of the SRCs.
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Development and exploration of refractory high entropy alloys—A review
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Processing and Properties of High-Entropy Ultra-High Temperature Carbides
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Lattice distortion in a strong and ductile refractory high-entropy alloy
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Metadata
- Authors
- Maiti, S., & Steurer, W.
- Venue
- Acta Materialia
- Publisher
- Elsevier BV
- Published
- 2016-03
- Volume
- 106
- Pages
- 87-97
- ISSN
- 1359-6454 (ISSN-L)
- OpenAlex
- W2964304476
- Cited by
- 331
- References
- 24
- FWCI
- 23.90
- Type
- journal article
- Language
- en
- Open access
- closed
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