Quantitative ultrasonic characterization of subsurface inclusions in tapered roller bearings

Showmic Islam, Satyajeet P. Deshpande, Luz D. Sotelo, Musa Norouzian, Michael T. Lumpkin, Liesl F. Ammerlaan, Allen J. Fuller, Joseph A. Turner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Initiation sites for rolling contact fatigue (RCF) in bearing components are often associated with subsurface inclusions. The presence of such defects within the region of maximum shear stress just below the contact surface can increase the local state of stress. Eventually, the high-stress region may initiate microcrack formation, leading to raceway spall that is detrimental to bearing performance. Thus, bearing steel cleanliness is critical, particularly in the near-race region. In this article, recent ultrasonic surface wave inspection methods are described with which subsurface inclusions can be identified and characterized. Our past work has shown that such an approach can be used to identify subsurface inclusions that spall when subjected to simulated service life tests. Here, the quantitative aspects of this research will be highlighted. The surface wave penetration depth and the reflection amplitude from an inclusion are both frequency dependent. Thus, multifrequency ultrasonic inspection procedures have been developed to exploit this behavior to identify the size and depth of inclusions. Reference measurements are based on samples created with artificial defects that have a known size and depth. Finite element (FE) modeling is used to identify inclusion sizes and depths that are deemed critical to bearing performance from which the ultrasonic inspection criteria are generated. This work is expected to impact the field of nondestructive testing for bearing components subjected to RCF.

Original languageEnglish (US)
Title of host publicationBearing Steel Technologies
Subtitle of host publication12th Volume, Progress in Bearing Steel Metallurgical Testing and Quality Assurance
EditorsJohn M. Beswick
PublisherASTM International
Pages66-81
Number of pages16
ISBN (Electronic)9780803176928
DOIs
StatePublished - 2020
Event12th Symposium on Bearing Steel Technologies: Progress in Bearing Steel Metallurgical Testing and Quality Assurance - Denver, United States
Duration: May 15 2019May 17 2019

Publication series

NameASTM Special Technical Publication
VolumeSTP 1623
ISSN (Print)0066-0558

Conference

Conference12th Symposium on Bearing Steel Technologies: Progress in Bearing Steel Metallurgical Testing and Quality Assurance
Country/TerritoryUnited States
CityDenver
Period5/15/195/17/19

Keywords

  • Bearing spalls
  • Rolling contact fatigue
  • Subsurface inclusions
  • Ultrasonic surface waves
  • Ultrasound inspection

ASJC Scopus subject areas

  • Materials Science(all)

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