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ISSN: 2643-6736

Advances in Robotics & Mechanical Engineering

Research article(ISSN: 2643-6736)

Numerical Investigation of Particle Tracking to Achieve High Impact Velocity in Cold Spray

Volume 2 - Issue 4

Muhammad Sohail Malik1*, Mona Azhar Khan2, Muhammad Suleman1, Ghulam Hussain1, Ramzan Abdul Karim1and Khurram Munir2

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    • 1Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Pakistan
    • 2School of Engineering, RMIT University, Australia

    *Corresponding author: Muhammad Sohail Malik, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Swabi, Pakistan

Received: July 20, 2020;   Published: July 29, 2020

DOI: 10.32474/ARME.2020.02.000145

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Abstract

Cold spray is a coating technique that allows for solid state deposition of particles under atmospheric conditions of pressure and temperature. In cold spray micron size particles are impinged upon a substrate as a result of high velocity impact. The acceleration of particles to a high velocity is achieved by expanding a pressurized gas in a supersonic convergentdivergent nozzle. The performance of cold spray technique can be judged by several parameters, one of which is the deposition efficiency based on impact velocity. It is observed in this work that particles having small diameters achieve high velocities during nozzle acceleration, but they also decelerate rapidly in the flow downstream of the bow shock wave because of having low momentum. The main concern of this paper was to examine the effect of particle size on impact velocity in the cold spray process and to find an optimum range of particle diameter which could result in greater impact velocity at the given conditions. For this purpose, Zinc particles having diameters range (1-50) microns were used to simulate in a supersonic nozzle numerically.

Keywords: Cold gas dynamic spraying (CGDS); Impact velocity; Deposition Criteria; Critical velocity; Particle impact temperature; Computational fluid dynamics (CFD)

Abstract| Introduction| Methodology| Results and Discussion| Conclusion| References|

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