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Characterization on Fracture Toughness of Cermet Coating Coupling Instrumented Indentation and X-Ray Computed Tomography

Ruizhe Huang1, Zhaoliang Qu1,*

1 Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China

* Corresponding Author: Zhaoliang Qu. Email: email

The International Conference on Computational & Experimental Engineering and Sciences 2024, 30(1), 1-1. https://doi.org/10.32604/icces.2024.011440

Abstract

The surface brittle fracture of cermet coating seriously restricts its application. Accurate evaluation of the fracture toughness of cermet coating is a prerequisite for improving its life. This paper aims to propose an accurate characterization method for fracture toughness of cermet coating. By coupling instrumented indentation and X‑ ray computed tomography, the indentation-induced fracture behaviors under various loads within WC-12%Co coatings were studied. The indentation response was correlated with the damage evolution directly observed within the coating. The impact of substrate effects on indentation-induced fracture behaviors was further studied using finite element analysis (FEA). The three-dimensional subsurface crack morphologies under different loads were nondestructively observed. The first pop-in event in the load-displacement (P-h) curve was determined to be triggered by bottom cracking, marking the onset of the multiple fracture mode. With the absence of pop-in events in the indentation response, Laugier's equation offered a consistently stable and reliable estimation of fracture toughness for the coating. The critical indentation depth for the first pop-in was suggested as the threshold for reliably extracting intrinsic fracture toughness of coatings. Numerical results revealed a constant linear relationship between the critical depth and coating thickness, and a high sensitivity of the critical depth to yield stress of the substrate.

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Cite This Article

APA Style
Huang, R., Qu, Z. (2024). Characterization on fracture toughness of cermet coating coupling instrumented indentation and x-ray computed tomography. The International Conference on Computational & Experimental Engineering and Sciences, 30(1), 1-1. https://doi.org/10.32604/icces.2024.011440
Vancouver Style
Huang R, Qu Z. Characterization on fracture toughness of cermet coating coupling instrumented indentation and x-ray computed tomography. Int Conf Comput Exp Eng Sciences . 2024;30(1):1-1 https://doi.org/10.32604/icces.2024.011440
IEEE Style
R. Huang and Z. Qu, “Characterization on Fracture Toughness of Cermet Coating Coupling Instrumented Indentation and X-Ray Computed Tomography,” Int. Conf. Comput. Exp. Eng. Sciences , vol. 30, no. 1, pp. 1-1, 2024. https://doi.org/10.32604/icces.2024.011440



cc Copyright © 2024 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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