Fatigue damage assessment using x-ray diffraction and life prediction methodology

Sam Y. Zamrik, Robert N. Pangborn

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


X-ray diffraction line broadening was used to monitor surface damage due to deformation (distortion) that was induced by low cycle fatigue. The integral breadth of selected diffraction peaks was identified as a useful parameter with which to evaluate cumulative fatigue damage. Torsional fatigue tests were conducted on nickel-based Waspaloy material which exhibited planar slip at 1200° F (649°C). X-ray diffraction measurements were taken at 22, 41, 60, and 90% of the life. The data disclosed an increase in breadth with each increment of cycling. The results obtained from line broadening analysis were carefully correlated with observations made on the specimen surface using scanning electron microscopy which showed the progressive distortion occurring in the cycled specimen. The integral breadth, β, was successfully correlated with the applied shear strain to predict the expended fraction of life and hence the remaining cyclic life.

Original languageEnglish (US)
Pages (from-to)407-413
Number of pages7
JournalNuclear Engineering and Design
Issue number3
StatePublished - Sep 2 1989

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • General Materials Science
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering


Dive into the research topics of 'Fatigue damage assessment using x-ray diffraction and life prediction methodology'. Together they form a unique fingerprint.

Cite this