Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A single-phase bcc high-entropy alloy in the refractory Zr-Nb-Ti-V-Hf
  system   We report on the production and characterization of a high-entropy alloy in
the refractory Zr-Nb-Ti-V-Hf system. Equiatomic ingots were produced by arc and
levitation melting, and were subsequently homogenized by high-temperature
annealing. We obtained a coarse-grained, single-phase high-entropy alloy, with
a homogeneous distribution of the constituting elements. The phase is a
chemically disordered solid solution, based on a bcc lattice with a lattice
parameter of 0.336(5) nm.

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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom