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Research Article

Adhesion strength evaluation for plasma-sprayed coatings based on intensity of singular stress

Nikolay Dolgov1,2, Maris Hauka3, Leonids Vinogradovs3

1G.S.Pisarenko Institute for Problems of Strength, Nat. Ac. Sci. of Ukraine, 2 Timiryazevska Str, Kyiv, Ukraine     

2National Transport University, 1 Omelianovycha-Pavlenka Str, Kyiv, Ukraine

3Department of Aeronautics, Riga Technical University, Riga, Latvia



Finite Element Method; 

Plasma-sprayed coatings; 

Tensile testing; 

Coated specimens; 

 Co-Cr alloy

This paper presents a new test method, including coated specimen, shear testing procedure, and algorithm for evaluation of critical intensity of singular stress for coating, for more accurate and complete characterization of adhesion strength. A procedure for determining the critical intensity of singular stress for coating is presented in this paper. In this paper, the coated specimen has been analysed in terms of the intensity of singular stress field. The adhesion strength of plasma-sprayed coatings was estimated in terms of the intensity of singular stresses in the vicinity of the free edge of the coating. The finite element analysis for normal and tensile stress distributions of the coated specimens are obtained by using different mesh sizes (fine, medium, and coarse size). Tensile testing of flat metal samples with plasma-sprayed coatings of Co-Cr alloy of various thicknesses (90, 100, 160 mm) was performed. The results show that the adhesion strength of the tested coatings can be represented by a critical stress of 1.34, 0.94, 0.88 MPa m0.43 for thicknesses of 90, 100, 160 mm, respectively.

© 2022 MIM Research Group. All rights reserved.


8/12/2023 Special Issue: Embark on a journey of innovation with the journal of Research on Engineering Structures and Materials as we unveil a compelling opportunity for contributors in our upcoming special issue, "Design, Analysis, and Manufacturing of Composite Vehicle Structures." Led by distinguished Guest Editors Liubov Gavva and Oleg Mitrofanov from Moscow Aviation Institute. For more info see the link.

21/10/2023 Journal Submission System Upgrade Completed: We're delighted to announce that our Journal Submission and Tracking System has undergone a significant upgrade, aimed at enhancing your experience. We apologize for the delay, and any inconvenience it may have caused. Here are the key enhancements from a user perspective:

Improvements are designed to make your interaction with our journal smoother and more efficient. Please take the upgraded system for a spin and share your thoughts with us. If you encounter any issues or have questions, please don't hesitate to reach out to our support team.

27/12/2022 Reviewer AwardsThe winners of 2022 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section. 

(More details of the news may be given in the News section)

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2022 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.

2022 Best Paper Award:

The paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 

2022 Most Cited Paper Award:

The paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the


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