Lattice dynamics in austenitic stainless steels Fe-18Cr-12Ni-2Mo and Fe-18Cr-16Ni-10Mn
Creators
- 1. Darmstadt University of Technology, Institute for Materials Science, Petersenstrasse 23, D-64287 Darmstadt (Germany)
- 2. Hahn-Meitner-Institut, SF2, Glienicker Strasse 100, D-14109 Berlin (Germany)
- 3. Forschungszentrum Juelich, IFF, D-52425 Juelich (Germany)
Description
Phonon dispersion curves of austenitic stainless steels Fe-18Cr-16Ni-10Mn and Fe-18Cr-12Ni-2Mo have been measured by triple-axis neutron spectroscopy. The data were analysed using Born-von Karman interactions as well as calculations including the contribution of conduction electrons on the lattice dynamics. An appropriate description of the experimental data was obtained by taking into account two-neighbour shells plus the contribution of the electron gas. The elastic constants and moduli obtained are close to reported results by ultrasonic studies on polycrystalline samples. The phonon densities of states in both systems calculated from the dispersion curves agree well with results obtained by time-of-flight neutron spectroscopy on polycrystalline samples. The Debye temperature Θ(T) shows a minimum around 40 K, similar to copper and nickel
Availability note (English)
Available online at http://stacks.iop.org/0953-8984/16/2609/cm4_15_012.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-8984/16/2609/cm4_15_012.pdf; http://www.iop.org/;
- DOI
- 10.1088/0953-8984/16/15/012;
- PII
- S0953-8984(04)73703-0;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 16
- Journal Issue
- 15
- Journal Page Range
- p. 2609-2616
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36000552
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- AUSTENITIC STEELS; COPPER; CRYSTAL LATTICES; DEBYE TEMPERATURE; DENSITY; DYNAMICS; ELASTICITY; ELECTRON GAS; ELECTRONS; NEUTRON SPECTROSCOPY; NICKEL; PHONONS; POLYCRYSTALS; STAINLESS STEELS; TIME-OF-FLIGHT METHOD
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CRYSTAL STRUCTURE; CRYSTALS; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; LEPTONS; MECHANICAL PROPERTIES; MECHANICS; METALS; PHYSICAL PROPERTIES; QUASI PARTICLES; SPECTROSCOPY; STEELS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS