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

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

Abstract

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.

Keywords

DLC coatings;ZDDP;finite-element method;AFM;

Data

Language:	English
Year of publishing:	2016
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	539.92:531.43:621.89(045)
COBISS:	14342939
ISSN:	0301-679X
Views:	547
Downloads:	465
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	DLC prevleke;metoda končnih elementov;mazanje;tribologija;
Type (COBISS):	Article
Embargo end date (OpenAIRE):	2019-11-07
Pages:	str. 19-26
Issue:	ǂVol. ǂ95
Chronology:	Mar. 2016
DOI:	10.1016/j.triboint.2015.10.036
ID:	11053097