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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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
Volume18
Issue number3
DOIs
Publication statusPublished - Mar 2005

Fingerprint

Defect structures
positrons
Positrons
Wear of materials
microstructure
Microstructure
defects
Stellite (trademark)
life (durability)
wear tests
Stellite
Temperature
Defects
sliding
Energy dispersive X ray analysis
Defect density
Doppler effect
surface layers
x rays
X ray diffraction analysis

Keywords

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

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering

Cite this

Investigations of microstructures and defect structures in wear affected region created on Nimonic 80A during high temperature wear. / Du, Hai Liang; Datta, P. K.; Inman, I. A.; Kuzmann, E.; Süvegh, K.; Marek, T.; Vértes, A.

In: Tribology Letters, Vol. 18, No. 3, 03.2005, p. 395-404.

Research output: Contribution to journalArticle

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