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

Related Articles

Intelligent Maintenance System by Using MARKOV Chain with Monte Carlo Simulation Approaches

This paper presents Markov chain technique as a tool for forecasting the suitable maintenance of machines that helps managers in organizational decision making. Markov process is a tool to predict that it can be make log...

An Experimental Study of Clayey Soil with Rice Husk Ash using Triaxial Test

In present study clayey soil is being used and tested along with solid waste namely Rice Husk Ash to demonstrates the effect of RHA on the geotechnical properties of clayey soil. Various laboratory tests such as Liquid l...

Optimization of Box Girder Bridge Using Genetic Algorithm Method

Box girder is widely used in bridge engineering because of its economy, aesthetic appearance. Now a day it is easy to get safe design due to recent advances in design field but safety with economy is the basic need of pr...

Simulation-Based Building Envelope Design Optimization Methodologies for Indoor Thermal Comfort – A Review

Thermal comfort is defined as ‘that condition of mind which expresses satisfaction with the thermal environment’. One of the basic requisite of building is to provide comfortable indoor conditions to maintain good health...

Upgraded the Performance of the Fortifying R.C. beam by CFRP In Flexural

The use of carbon fiber fortified polymer (CFRP) has been comprehensively utilized for the reinforcing of concrete structures. Some development organizations utilize CFRP in flexural fortifying of reinforced concrete bea...

Download PDF file
  • EP ID EP437783
  • DOI 10.9790/1684-1502032934.
  • Views 69
  • Downloads 0

How To Cite

A. Tahiria, M. Idiri, S. El Joumani, B. Boubekera (2018). Grain Size Effects in Indentation Response of Nan crystalline Tungsten –A Molecular Dynamic Simulation. IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE), 15(2), 29-34. https://europub.co.uk/articles/-A-437783