Investigations of microstructures and defect structures in wear affected region created on Nimonic 80A during high temperature wear

Hai Liang Du, P. K. Datta, I. A. Inman, E. Kuzmann, K. Süvegh, T. Marek, A. Vértes

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2 Citations (Scopus)


The microstructures of a wear induced surface glazed layers formed during sliding wear of Nimonic 80A against Stellite 6 at 20-750 °C using a speed of 0.314 m s-1 under a load of 7 N have been investigated using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) in combination with energy dispersive X-ray (EDX) analysis. The defects formed in the glazed layers were measured by positron lifetime spectroscopy. The results indicate the formation of a wear resistant nanostructured glazed layer. Positron lifetime and Doppler-broadening measurements demonstrated that the defects (mainly dislocations) existed in the glazed layers at low temperatures which increasing wear test temperature led to decrease in defects density. Positron measurements also suggested that, at the annealing temperature (1200 °C), the presence of dislocations might lead to the formation of ordered or partially ordered regions in Nimonic 80A.

Original languageEnglish
Pages (from-to)395-404
Number of pages10
JournalTribology Letters
Issue number3
Publication statusPublished - Mar 1 2005



  • Glaze layer
  • Mössbauer
  • Oxidation
  • Positrons annihilation
  • Superalloy
  • Wear

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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