Cavitation erosion mechanisms in stainless steels and in composite metal–ceramic HVOF coatings

Gabriel Taillon, Fabrice Pougoum, Sebastien Lavigne, Laurent Ton-That, Robert Schulz, Etienne Bousser, Sylvio Savoie, Ludvik Martinu, Jolanta Ewa Klemberg-Sapieha

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Cavitation erosion is a leading cause of hydraulic machinery erosion: imploding cavitation bubbles cause impacts, pitting, and mass loss leading to the component׳s failure. Damage can be mitigated by the use of protective coatings tailored to resist pitting and crack nucleation, to greatly increase the part׳s lifetime. Coatings deposited with the High Velocity Oxy-Fuel (HVOF) process demonstrate low porosity, high hardness and high adhesion. In this work, the cavitation erosion behavior of martensitic and ferritic stainless steels and HVOF coatings prepared from pure Fe3Al powder and Fe3Al reinforced with nitride and boride phases was investigated using the G32 vibratory setup. The results are compared with coatings sprayed from commercial powders: WC–CoCr and Cr3C2–NiCr. HVOF coatings exhibit slightly lower erosion rates than martensitic stainless steels. The mechanical properties were evaluated using depth sensing indentation: higher hardness was associated with better cavitation erosion resistance for steels, but not for the coatings. The composite coatings’ wear mechanisms followed a matrix erosion pattern accompanied by ceramic grain removal.

Original languageEnglish
Pages (from-to)201-210
Number of pages10
JournalWear
Volume364-365
DOIs
Publication statusPublished - 2016 Oct 15
Externally publishedYes

Keywords

  • Ball-milling
  • Cavitation erosion
  • HVOF
  • Martensitic/Ferritic steels
  • Metal ceramic composite
  • Wear mechanisms

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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  • Cite this

    Taillon, G., Pougoum, F., Lavigne, S., Ton-That, L., Schulz, R., Bousser, E., Savoie, S., Martinu, L., & Klemberg-Sapieha, J. E. (2016). Cavitation erosion mechanisms in stainless steels and in composite metal–ceramic HVOF coatings. Wear, 364-365, 201-210. https://doi.org/10.1016/j.wear.2016.07.015