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

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.15708· OSTI ID:5662458

Manosa, L; Zarestky, J; Lograsso, T; Delaney, D W; Stassis, C ^[1]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)

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 TA[sub 2][110] branch have very low energies with anomalous temperature dependence. A slight anomaly at [ital 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.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5662458
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:21; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
BEAMS
BERYLLIUM ALLOYS
COPPER ALLOYS
INELASTIC SCATTERING
NEUTRON BEAMS
NUCLEON BEAMS
PARTICLE BEAMS
PHASE STUDIES
SCATTERING
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TERNARY ALLOY SYSTEMS