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Singh, Ramanshu P.
- Investigation of temperature dependent mechanical, thermophysical and ultrasonic properties of ScZrHf ternary alloy
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1 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research,Veer Bahadur Singh Purvanchal University, Jaunpur-222001, Uttar Pradesh India., IN
1 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research,Veer Bahadur Singh Purvanchal University, Jaunpur-222001, Uttar Pradesh India., IN
Source
Journal of Pure and Applied Ultrasonics, Vol 44, No 3-4 (2022), Pagination: 79-85Abstract
In this paper, we present theoretically evaluated values of temperature mechanical, thermophysical and ultrasonic properties of hexagonal close-packed structured medium entropy alloy ScZrHf in temperature range of 0-900 K. By utilizing the Lennard-Jones potential model, we have computed the second order and third order elastic constants (SOECs and TOECs) with the help of lattice parameters. While all of the SOECs have been found to be decreasing with increase in temperature, the TOECs increases with temperature. SOECs and TOECs have been used to compute the elastic moduli such as: bulk modulus, shear modulus, Young's modulus and Poisson's ratio, and ultrasonic velocities at different angle along unique axis. Further, the thermal properties such as Debye temperature, Debye heat capacity, energy density of ScZrHf in temperature range of 0-900 K and lattice thermal conductivity of ScZrHf in temperature range of 300-900K have been estimated. The lattice thermal conductivity decreases with increase in temperature. Finally, the ultrasonic attenuation due to phonon - phonon interaction in both longitudinal and shear modes and themoelastic relaxation mechanism have been computed for ScZrHf ternary alloy in the temperature range of 300-900 K and it has been found that the attenuation due to phonon-phonon interaction is much higher than that due to thermoelastic relaxation mechanism.Keywords
Refractory Medium-Entropy Alloys, Hexagonal Closed-Packed, Ultrasonic Behaviour, Rare-Earth, Transition Metal.Full Text
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