Mechanical behaviour and constitutive models of ZDDP tribofilms on DLC coatings using nano-indentation data and finite element modelling

Bartolomé, Luis (author), Oblak, Eva (author), Kalin, Mitjan (author)

The mechanical behaviour of zinc dialkyldithiophosphate (ZDDP) tribofilms on diamond-like carbon (DLC) coatings has been studied by combining the nano-indentation experimental data and finite-element modelling. Different constitutive models, whose analysis was performed using a global algorithm that consists of forward and inverse algorithms, were chosen to establish which of them more accurately predicts the actual mechanical behaviour of the ZDDP tribofilms. A non-homogeneous, dual structure, which was also verified by the local stiffness using the AFM force-modulation mode, was found. Based on the proposed algorithm, the mechanical properties of the ZDDP tribofilms were found, e.g. the elastic modulus E=26 GPa and the yield stress Y=1.55 GPa for the harder component and approximately E=1.65 GPa and Y=0.144 GPa for the softer component.

• Language: English
• Keywords: DLC coatings, ZDDP, finite-element method, AFM
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2016
• Number of pages: Str. 19-26
• Numbering: Vol. 95
• PID: 20.500.12556/RUL-106737
• UDC: 539.92:531.43:621.89(045)
• ISSN on article: 0301-679X
• DOI: 10.1016/j.triboint.2015.10.036
• COBISS.SI-ID: 14342939
• Publication date in RUL: 14.03.2019

Record is a part of a journal

• Title: Tribology international
• Shortened title: Tribol. int.
• Publisher: Butterworth Scientific
• ISSN: 0301-679X
• COBISS.SI-ID: 26558976

Secondary language

• Language: Slovenian
• Keywords: DLC prevleke, metoda končnih elementov, mazanje, tribologija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0231
• Name: Tribologija