Experimental and theoretical studies on the elasticity of tungsten to 13 GPa
Journal Article
·
· Journal of Applied Physics
- Stony Brook Univ., NY (United States). Dept. of Geosciences; Research foundation of SUNY
- Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794, USA
- Stony Brook Univ., NY (United States). Dept. of Geosciences
- Stony Brook Univ., NY (United States). Dept. of Geosciences, and Mineral Physics Inst.
Compressional (V_P) and shear wave (V_S) velocities of polycrystalline tungsten have been measured up to ~13 GPa at room temperature using ultrasonic interferometry in a multi-anvil apparatus. Using finite strain equation of state approaches, the elastic bulk and shear moduli and their pressure dependences are derived yielding $$K_{S0}$$= 325.9 ± 4.8 GPa, $$G_0$$ =164.1±2.5 GPa, $$K^{'}_{S0}$$ =3.65 ± 0.05 and $$G^{'}_0$$ =1.28 ± 0.02. On the basis of the current experimental data, the high-pressure behavior of Young’s modulus, Poisson’s ratio and ductility/brittleness for tungsten are also investigated. Complementary to the experimental data, the single crystal elastic constants, as well as the elastic anisotropy of tungsten are computed using density functional theory (DFT). The Voigt-Reuss-Hill average of the bulk and shear moduli calculated using the single crystal elastic constants from DFT are found comparable to the current experimental results within about 5%. Here, the present study offers a dataset for the elasticity of polycrystalline bcc tungsten to a maximum pressure more than 25-fold higher than other previous ultrasonic studies, which can further our understanding about the elastic, mechanical and electronic properties of tungsten under extreme conditions as well as thermodynamic modelling of its alloys.
- Research Organization:
- State Univ. of New York (SUNY), Stony Brook, NY (United States). Research Foundation of SUNY
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0002907
- OSTI ID:
- 1529600
- Alternate ID(s):
- OSTI ID: 1464987
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 124; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Acoustic velocities, elasticity, and pressure-induced elastic softening in compressed neodymium
Thermoelasticity and anomalies in the pressure dependence of phonon velocities in niobium
Experimental and first-principles studies on the elastic properties of α-hafnium metal under pressure
Journal Article
·
Fri Jan 29 19:00:00 EST 2021
· Mechanics of Materials
·
OSTI ID:1850351
Thermoelasticity and anomalies in the pressure dependence of phonon velocities in niobium
Journal Article
·
Tue Jan 02 19:00:00 EST 2018
· Applied Physics Letters
·
OSTI ID:1505561
Experimental and first-principles studies on the elastic properties of α-hafnium metal under pressure
Journal Article
·
Tue Mar 29 20:00:00 EDT 2016
· Journal of Applied Physics
·
OSTI ID:1245457