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Skorynina, P. A.
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Publications (2/2 displayed)
- 2021Plasma nitriding in complex post-processing of stainless steel parts obtained by additive laser technology
- 2021Adhesion strength of Tii_<sub>x</sub>C<sub>x</sub> – DLC multilayer nanocomposite thin films coated by ion-plasma deposition on martensitic stainless steel produced by selective laser melting followed by plasma-nitriding and burnishingcitations
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article
Adhesion strength of Tii_<sub>x</sub>C<sub>x</sub> – DLC multilayer nanocomposite thin films coated by ion-plasma deposition on martensitic stainless steel produced by selective laser melting followed by plasma-nitriding and burnishing
Abstract
<jats:title>Abstract</jats:title><jats:p>[Ti<jats:sub>0.2</jats:sub>C<jats:sub>0</jats:sub>.<jats:sub>8</jats:sub>/a-C]<jats:sub>40</jats:sub> multilayer thin films composed of forty pairs of TiC and pure carbon layers were formed on a selective laser melted (SLM) martensitic stainless steel by means of ion-plasma deposition process. SLM steel was pre-treated by one of the two following schemes: (1) oil quenching from 1040°C followed by heating to 480°C for 4 hours and air cooling (HT), finish milling (FM); (2) HT, FM, ion-plasma nitriding followed by burnishing. Mechanical failure mode and critical load <jats:italic>L<jats:sub>c</jats:sub></jats:italic> for damaging the coatings were determined using linear scratch tests performed at linearly-increased normal force. Indentation by conical diamond tip were carried out in order to asses an elastic recovery and energy dissipation coefficient defined as the ratio of plastic to total deformation energy. The scratch test results showed that the post-processing of the substrate strongly influenced the failure mode of the coating and increased the critical load from 320 mN to 920 mN. Indentation revealed that nitriding and burnishing before coating deposition increase the elastic recovery of the [Ti<jats:sub>0.2</jats:sub>C<jats:sub>0</jats:sub>.<jats:sub>8</jats:sub>/a-C]<jats:sub>40</jats:sub> coating-substrate system from 24% to 68%. The energy dissipation coefficient drops from 79% to 45%.</jats:p>