Finite element analysis of scratch test of films on substrate

DOI: 10.62564/M4-IV1352

Irina Valeeva¹, Ivan Goroshko<sup>2

1</sup>Frantsevitch Institute for Problems of Materials Science NASU, Ukraine
²Taras Shevchenko National University of Kyiv, Ukraine


Scratch test is an important investigation method which is used to evaluate mechanical properties of materials and structures, adhesion of coatings, etc. The stress distribution in the sample is the most important information, which affects its deformation, damage and fracture of the sample material. Simulation of scratch tests of samples with refractory, hard and other coatings or different film-substrate systems allows us to understand which type of load occurs between the substrate and the coating, which type of load affects delamination of coatings [1]. The aim of this study is to implement finite element simulation of the elasto-plastic deformation during scratch test using ANSYS software. The scratch tests were performed to study the adhesive properties of films on substrates. The test was performed with a linearly increasing force of 13 mN/s applied vertically to the indenter. The force was increased until the load reached 500 mN. At the same time, the Rockwell indenter was moved at a speed of 10 μm/s in the horizontal direction. The radius of the Rockwell indenter was 10µm. Finite element analysis of scratch test was applied to film-substrate systems. Large deformation in scratch zone causes essential difficulties during finite element analysis that related to mesh distortion, which leads to an abort of solution process. To overcome these computational difficulties, researchers use special approaches and software. Nonlinear mesh adaptive technology was applied to overcome the distortion of finite elements. The fields of displacement, stress, and strain in the film-substrate systems were obtained as a result of scratch test simulation. Numerical simulation allows us to study the influence of each parameter on the scratch test results. Finite element analysis can explain how the results of scratch test depend on the mechanical properties of the film-substrate systems.

Keywords
scratch test, finite element simulation, film on substrate, ANSYS

Acknowledgments
Not provided

References
[1] Li, J., Beres, W. Three-dimensional finite element modelling of the scratch test for a TiN coated titanium alloy substrate. Wear, 2006. V. 260, No. 11-12. P. 1232‑1242.