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Technical Brief

Molecular Dynamics Simulation of Mechanical Polishing on Stainless Steel Using Diamond Nanoparticles

[+] Author and Article Information
Prabhat Ranjan, R. Balasubramaniam

Precision Engineering Division,
Bhabha Atomic Research Centre,
Mumbai 400085, India;
Homi Bhabha National Institute,
Mumbai 400094, India

V.K. Jain

Department of Mechanical Engineering,
Indian Institute of Technology,
Kanpur 208016, India

1Present address: Department of Mechanical Engineering, M.A.N.I.T., Bhopal 462003, India.

Manuscript received January 7, 2018; final manuscript received October 29, 2018; published online November 26, 2018. Assoc. Editor: Y. B. Guo.

J. Manuf. Sci. Eng 141(1), 014504 (Nov 26, 2018) (4 pages) Paper No: MANU-18-1016; doi: 10.1115/1.4041914 History: Received January 07, 2018; Revised October 29, 2018

Mechanical polishing is one of the essential attributes of nanofinishing. To maintain precision during nanofinishing process, the mechanical polishing needs to be studied and analyzed at nanometric scale. In view of this, a set of molecular dynamics simulation has been carried out to analyze the process behavior and its effects on abrasive particles. After simulation, it is observed that the finishing force and velocity damage the abrasive particle by changing its phase from diamond cubic to graphite. Thus, the abrasive particles need replacement in a scheduled time-bound manner. In addition, a strategy has been proposed for efficient and economic polishing.

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References

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Figures

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Fig. 1

Schematic model of mechanical polishing of stainless steel with diamond abrasive particle

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Fig. 2

(a) Radial distribution function plot of diamond abrasive particle at different time steps of polishing and (b) zoomed view of the RDF plot in the distance range from 1.3 to 1.7 Å

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Fig. 3

(a) von-Mises stress during initial contact of polishing, i.e., at time-step = 3500; (b) von-Mises stress on abrasive particle; and (c) von-Mises stress on zoomed view of workpiece. Here, atoms color represents stress value as shown in vertical color bar in GPa.

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Fig. 4

Percentage of C-atoms in SP3, SP2, SP1, and SP0 C-atoms at varying polishing time. Here, SP3 belongs to diamond cubic and remaining belong to nondiamond cubic lattices.

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Fig. 5

(a) Subsurface defects during mechanical polishing on stainless steel at time = 30,000 fs and (b) plot of subsurface defects with the polishing time

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Fig. 6

Temperature distribution on the work-piece at time = 3500 fs

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