Rolling-Element Fatigue Life of AISI M-50 and 18-4-1 Balls.

Abstract

Rolling-element fatigue studies were conducted with VIM-VAR AISI M-50, EFR 18-4-1, and VAR 18-4-1. Groups of 12.7-mm (1/2-in.) diameter balls of each material were tested in the five-ball fatigue tester. Test conditions included a load of 1540 N (347 lbf) giving a maximum Hertz stress of 5520 MPa (800 000 psi), a shaft speed of 10 700 rpm, and a contact angle of 30 deg. Tests were run at a race temperature of 339 K (150 deg F) with a type II ester (MIL-L-23699) lubricant. The rolling-element fatigue life of VIM-VAR AISI M-50 was not significantly different from that of EFR 18-4-1 or VAR 18-4-1 based on a statistical comparison of the test results.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1978
Accession Number
ADA329693

Entities

People

  • Erwin V. Zaretsky
  • Richard J. Parker

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Austenite
  • Ball Bearings
  • Bearings
  • Chemical Composition
  • Chemistry
  • Elements
  • Engines
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Hardness
  • Heat Treatment
  • Jet Engines
  • Lubricants
  • Materials
  • Steel
  • Turbines

Readers

  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).