Understanding of fracture conditions and material response in a model TiN film/stainless steel substrate system – A cross-sectional scratch test study

Wu, Guizhi; Li, Yongjun; Brittain, Rob; Lu, Zhibin; Yang, Liuquan

doi:10.1016/j.surfcoat.2022.128340

Cited by 17 publications

(1 citation statement)

References 22 publications

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“…Nevertheless, another essential property that needs to be considered is the adhesion between the film and the substrate since it is related to the functionality and durability of the film-substrate system in diverse demanding applications [7][8][9]. Several techniques can be used for the adhesion evaluation of thin films [10][11][12][13][14], the scratch test being the most common [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

3D finite element simulation of scratch testing to quantify experimental failure mechanisms of a thin film

Pérez-Higareda,

Jirón-Lazos,

Montiel-González

et al. 2023

Modelling Simul. Mater. Sci. Eng.

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In this work, an exhaustive finite element (FE) simulation was developed to closely reproduce experimental parameters such as normal force, tangential force, and penetration depth along the whole scratch test. We used an 800 nm thick Ti–Al–N thin film deposited by sputtering as the reference sample to carry out scratch tests identifying the appearance of failure mechanisms at different longitudinal displacements and critical loads. The hardening models of thin film and substrate allowed us to quantify the maximum principal stresses responsible for thin film spallation, about 14.5 GPa for the tensile mode and −1.49 GPa for the compression mode. These parameters provided an improved perspective to characterize the failure mechanisms on the sample during the scratching. The present enhanced 3D FE simulation can be a crucial tool for designing film-substrate systems with more precise mechanical strength calculations.

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