Pressure derivatives of elastic moduli in body-centered-cubic (bcc) transition metals and their solutions. Final report, 1 June 1975-31 May 1980
Technical Report
·
OSTI ID:6950537
Objectives are to study the elasticity, equations-of-state, and structural stability of bcc transition metals and alloys based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W. The studies of the elastic moduli and their pressure and temperature dependence have helped to clarify the nature of the alloy electronic band structure and its dependence on strain. The studies of elastic moduli and lattice parameters under pressure have also enabled establishing accurate P-V equations-of-state valid to several hundred kbars. We also investigated the effects of interstitial hydrogen on the elastic properties of these alloys. In the elastic studies, the elastic moduli were measured ultrasonically as functions of pressure, and in some cases temperature and hydrogen content, for single crystals of 25 different compositions. Progress was also made on the composition-pressure phase relationships in Ti-, Zr-, and Hf-based alloys. X-ray diffraction and diamond-anvil pressure cells were used to determine lattice parameters and structural phase boundaries to ultra-high pressures for the 9 elements 8 Ti-V alloys, and 4 Zr-Hf alloys. (DLC)
- Research Organization:
- Hawaii Univ., Honolulu (USA). Hawaii Inst. of Geophysics
- DOE Contract Number:
- AT03-76ER70012
- OSTI ID:
- 6950537
- Report Number(s):
- DOE/ER/70012-T1; ON: DE83002614
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
BCC LATTICES
CHROMIUM ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELASTICITY
ELEMENTS
HAFNIUM ALLOYS
HIGH PRESSURE
HYDROGEN
LATTICE PARAMETERS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
NONMETALS
PHASE STUDIES
PRESSURE DEPENDENCE
RESEARCH PROGRAMS
TANTALUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ALLOYS
VANADIUM ALLOYS
ZIRCONIUM ALLOYS
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
BCC LATTICES
CHROMIUM ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELASTICITY
ELEMENTS
HAFNIUM ALLOYS
HIGH PRESSURE
HYDROGEN
LATTICE PARAMETERS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
NONMETALS
PHASE STUDIES
PRESSURE DEPENDENCE
RESEARCH PROGRAMS
TANTALUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ALLOYS
VANADIUM ALLOYS
ZIRCONIUM ALLOYS