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Lattice-dynamical study of the premartensitic state of the Cu-Al-Be alloys

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Neutron-scattering techniques have been used to study the premartensitic state of a family of Cu-Al-Be alloys, which transform from the bcc phase to an 18R martensitic structure. We find that the phonon modes of the TA2[110] branch have very low energies with anomalous temperature dependence. A slight anomaly at q=2/3 was observed; this anomaly, however, does not change significantly with temperature. No elastic peaks, related to the martensite structure, were found in the premartensitic state of these alloys. The results are compared with measurements, performed under the same instrumental conditions, on two Cu-Al-Ni and a Cu-Zn-Al martensitic alloy.

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.15708

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

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Transformacions de fase (Física estadística)

# metadata.dc.title[].value
Lattice-dynamical study of the premartensitic state of the Cu-Al-Be alloys