Abstract
In recent decades, changes in the surface properties of materials have been used to improve their tribology characteristics. However, this improvement depends on the process, treatment time and, essentially, the thickness of this surface film layer. Physical vapor deposition (PVD) has been used to increase the surface hardness of metallic materials. The aim of the present study was to propose a numerical-experimental method to assess the thickness (l) of films deposited by PVD. To reach this objective, Vickers experimental hardness data (HV) assays were combined with numerical simulation to study the behavior of this property as a function of maximum penetration depth of the indenter (hmax) into the film/substrate conjugate. A strategy was developed to combine the numerical results of the H x hmax/l curve with Vickers experimental hardness data (HV). This methodology was applied to a TiN-coated M2 tool steel conjugate. The mechanical properties of the studied materials were also determined. The thickness results calculated for this conjugate were compatible with their experimental data.
Highlights
Thin films are currently been used in a significant number of industrial applications and research, e.g., to increase surface resistance to corrosion and improve the tribological properties of mechanical components, to increase the surface strength of cutting tools, and to introduce a biocompatible layer in medical implants and electromagnetic devices.1, 2To this end, knowledge of the mechanical properties of conjugates composed of thin films deposited onto metallic substrates is necessary to predict the mechanical behavior of these coated systems and their numerous applications.2 in such conjugates, traditional standard tensile testing cannot be applied to obtain their mechanical properties
The first consists of conducting several instrumented indentation tests
Based on the experimental results obtained in the instrumented indentation test with a Berkovich indenter, a number of numerical simulations was carried out in order to determine the mechanical properties for of both Titanium Nitride (TiN) and M2 tool steel substrate
Summary
Thin films are currently been used in a significant number of industrial applications and research, e.g., to increase surface resistance to corrosion and improve the tribological properties of mechanical components, to increase the surface strength of cutting tools, and to introduce a biocompatible layer in medical implants and electromagnetic devices. . Thin films are currently been used in a significant number of industrial applications and research, e.g., to increase surface resistance to corrosion and improve the tribological properties of mechanical components, to increase the surface strength of cutting tools, and to introduce a biocompatible layer in medical implants and electromagnetic devices.1, 2 To this end, knowledge of the mechanical properties of conjugates composed of thin films deposited onto metallic substrates is necessary to predict the mechanical behavior of these coated systems and their numerous applications.. It was proposed a simple experimental-numerical methodology to determine the thickness of these films by comparing this numerical result with experimental Vickers hardness testing
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