HVOF Coating of Inconel 625 Blended with WC: Fracture Toughness Measurement


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HVOF coating finds application in industry to protect the surface from the harsh environments such as high temperature, corrosion, and abrasion. In the present study, HVOF coating consisting of Inconel 625 powders blended with WC particles and sprayed on to 304 steel is carried out. The mechanical properties, such as elastic modules and fracture toughness, of the resulting coating are determined using the indentation tests. The influence of the mass fraction of WC on the fracture toughness and elastic modulus of the coating are also examined. It is found that addition of WC particles in Inconel 625 powder enhances the fracture toughness of the resulting surface. This is attributed to increased elastic modules and hardness.



Advanced Materials Research (Volumes 264-265)

Edited by:

M.S.J. Hashmi, S. Mridha and S. Naher




Z.Y. Al-Taha et al., "HVOF Coating of Inconel 625 Blended with WC: Fracture Toughness Measurement", Advanced Materials Research, Vols. 264-265, pp. 1972-1981, 2011

Online since:

June 2011




[1] W. M. Steen, Laser Material Processing, 1994, Springer –Verlag, London.

[2] http: /www. airproducts. com/Products/CylinderGases/default. htm, (2008).

[3] M. D. F. Harvey, S. Shrestha and A. Sturgeon, Coatings for offshore applications by high velocity wire flame spraying, NACE 2005, Houston, Texas.

[4] D. M. Nuruzzaman, A. Nakajima and T. Mawatari, Effects of substrate surface finish and substrate material on durability of thermally sprayed WC cermet coating in rolling with sliding contact, Tribology International, 39, 2006, 678–685.

DOI: https://doi.org/10.1016/j.triboint.2005.06.003

[5] T. Y. Cho, J. H. Yoon, K. O. Song, Y. K. Joo, W. Fang, S. H. Zhang, S. J. Youn, H. G. Chun and S. Y. Hwang, A study on HVOF coatings of micron and nano WC-Co powders, Surface and Coating Technology, 202, 2008, 5556-5559.

DOI: https://doi.org/10.1016/j.surfcoat.2008.06.106

[6] Y. Qiao, T. E. Fischer and A. Dent, The effects of fuel chemistry and feedstock powder structure on the mechanical and tribological properties of HVOF thermal-sprayed WC–Co coatings with very fine structures, Surface and Coatings Technology, 172, 2003, 24–41.

DOI: https://doi.org/10.1016/s0257-8972(03)00242-1

[7] P. Chivavibul, M. Watanabe, S. Kuroda and K. Shinoda, Effects of carbide size and Co content on the microstructure and mechanical properties of HVOF-sprayed WC-Co coatings, Surface and Coating Technology, 202, 2007, 509-521.

DOI: https://doi.org/10.1016/j.surfcoat.2007.06.026

[8] W.C. Oliver and G.M. Pharr. Improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments J of Materials Research, 7 (1992) 1564-1580.

DOI: https://doi.org/10.1557/jmr.1992.1564

[9] Niihara, K., Morena, R. and Hasselman, D. P. H. Indentation fracture toughness of brittle materials for palmqvist cracks Fracture Mechanics of Ceramics, 5 (1983) 97-105.

DOI: https://doi.org/10.1007/978-1-4613-3488-0_7

[10] E. Lopez Cantera and B.G. Mellor, Fracture toughness and crack morphologies in eroded WC-Co-Cr thermally sprayed coatings, Materials Letters, 37 (1998) 201-210.

DOI: https://doi.org/10.1016/s0167-577x(98)00092-5

[11] A. G. Evans and E. A. Charles. Fracture Toughness Determinations by Indentation. Journal of the American Ceramic Society, 59 (1976) 370–371.

[12] G. R. Anstis, P. Chantikul, B. R. Lawin, D. B. Marshall. A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I, Direct crack measurements. Journal of the American Ceramic Society, Volume 64(1981) 533-538.

DOI: https://doi.org/10.1111/j.1151-2916.1981.tb10320.x

[13] A. G. Evans, T. R. Wilshaw. Quasi-static solid particle damage in brittle solids—I. Observations analysis and implications. Acta Metallurgica, Volume 24, Issue 10, October 1976, Pages 939-956.

DOI: https://doi.org/10.1016/0001-6160(76)90042-0

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