Wear Mechanism of Diamond Tool against Mold Steel in Single Point Diamond by Molecular Dynamics

Fei Xie; Zhu Ji Jin; Xiao Guang Guo; Shuang Ji Shi

doi:10.4028/www.scientific.net/AMM.851.186

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 851Wear Mechanism of Diamond Tool against Mold Steel...

Wear Mechanism of Diamond Tool against Mold Steel in Single Point Diamond by Molecular Dynamics

Abstract:

Owing to the extremely rapid tool wear, ultra-precision manufacturing of mold steel through single point diamond turning (SPDT) operation becomes a challenging task. Molecular dynamics (MD) simulation is an appropriate tool to study nanoscale processes occurring at the femtosecond/picosecond timescale. The wear mechanism of the diamond tool is discussed by means of molecular dynamics in which atomic position variation, temperature fluctuations were involved. According to the analysis results, iron atoms have unpaired d electrons, these iron atoms may connect with diamond carbon atoms through chemical bonds which are the driving force to the diamond removal and making diamond convert into graphite. The simulation results demonstrated that, it is possible to mitigate the wear of diamond tools effectively, if those bindings between unpaired d electrons and diamond carbon atoms of the tool can be under control.

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Periodical:

Applied Mechanics and Materials (Volume 851)

Pages:

186-190

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.851.186

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Online since:

August 2016

Authors:

Fei Xie, Zhu Ji Jin, Xiao Guang Guo*, Shuang Ji Shi

Keywords:

Diamond Graphitization, Mold Steel, Molecular Dynamics Simulation, Wear Mechanism

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* - Corresponding Author

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