Grain Size Effects in Indentation Response of Nan crystalline Tungsten –A Molecular Dynamic Simulation
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 2
Abstract
In this study we tried a series of nanoindentation test on nanocrystalline (nc) tungsten (W) specimens, using Molecular Dynamics (MD) simulations and Embedded Atom Method (EAM). We studied the grain size effect in the range of 6 to 15 nm, with a penetration rate of 5 Å /ps and at room temperature 300 K. We found the reduced elastic modulus Er and the Young elastic modulus E dependent of grain size. On the other hand, we investigated the effect of the penetration velocity ranging from 3 Å/ps to 5 Å/ps. We found that the elastic modulus increases when the rate of penetration increases. The found results are in good agreement with data experiment and the literature.
Authors and Affiliations
A. Tahiria, M. Idiri, S. El Joumani, B. Boubekera
Keywords
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