Mechanical properties and sound velocity of gold copper (AuCu) II superlattice: 3D molecular dynamic (MD) simulation

• Autorzy: Aish Mohammed Mahmoud

Identyfikatory

DOI

10.15632/jtam-pl/126389

• Języki publikacji: EN

Abstrakty

EN

Young’s modulus, yield stress and Poisson’s ratio are studied for different size and tem- perature. The temperature dependence of simulated Young’s modulus is quite similar to experimental results. Transverse sound velocity is estimated from the simulated elastic con- stants at each temperature. The dislocation speed reaches up to 75% of the transverse sound velocity. The dislocation speed decreases with increasing temperature linearly. The tempera- ture dependence of macroscopic deformation behavior and the possibility of the existence of supersonic dislocations are discussed. The transverse sound velocity and rigidity G is calcu- lated from Young’s modulus, Poisson’s ratio and density ρ which changes with temperature.

Słowa kluczowe

EN

sound velocity; rigidity; Young's modulus; Poisson’s ratio; density

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2020
• Tom: Vol. 58 nr 4
• Strony: 901--909
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Aish Mohammed Mahmoud

• Physics Department Menoufia University, Gamal Abd El-Nasir, Menoufia, Egypt

Bibliografia

• 1. Aish M.M., 2019, The structural transformation and mechanical strength of Ni, Ti nanowires and Nitinol alloys at various vacancy rates: molecular dynamic study using Cleri-Rosato potential, Materials Physics and Mechanics, 42, 211-223.
• 2. Aish M.M., Shatnawi M.T.M., Starostenkov M.D., 2015, Characterization of strain-induced structural transformations in CdSe nanowires using molecular dynamics simulation, Materials Physics and Mechanics, 24, 4, 403-409.
• 3. Aish M.M., Starostenkov M.D., 2016, Features of structural transformations of HCP metallic Ti nanowires using Cleri-Rosato potential at low temperature, Letters on Materials, 6, 4, 317-321.
• 4. Antohe S., Ion L., Ruxandra V., 2001, Electrical properties of electron irradiated thin polycrystalline CdSe layers, Journal of Applied Physics, 90, 5928.
• 5. Cleri F., Rosato V., 1993, Tight-binding potentials for transition metals and alloys, Physical Review B, 48, 22.
• 6. Griebel M., Knapek S., Zumbusch G., 2007, Numerical Simulation in Molecular Dynamics, Berlin, Heidelberg: Springer, ISBN 978-3-540-68094-9.
• 7. Haile J.M., 2001, Molecular Dynamics Simulation: Elementary Methods, Wiley, ISBN 0-471-18439-X.
• 8. Leach A., 2001, Molecular Modelling: Principles and Applications, 2nd edit., Prentice Hall, ISBN 978-0-582-38210-7.
• 9. Schlick T., 2002, Molecular Modeling and Simulation, Springer, ISBN 0-387-95404-X.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).