Evaluation of the elastic properties of a functionally‐graded coating from the indentation measurements

Abstract

The paper focuses on the development of a mathematical model connecting penetration profile of a rigid circular indenter with elastic properties of a functionally graded coating (FGC). We introduce the concept of stiffness function dependent on the radius of the contact zone for FGC coupled with a homogeneous half-space. This approach allows one to determine the properties variation across the coating. Several most typical numerical examples are discussed in detail to illustrate effect of the Young's modulus variation on the stiffness function. These examples also show that the proposed methodology allows one to identify and experimentally distinguish between different types of variation of FGC elastic properties.

Comparative Investigations of AlCrN Coatings Formed by Cathodic Arc Evaporation under Different Nitrogen Pressure or Arc Current

“…During the last few decades, extensive works have been carried out on the production and testing of the properties of thin coatings which can be applied in industry, medicine, electronics as protective and decorative coatings, memory technology, etc. [ 1 , 2 ].…”