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Wear of liquid nitrogen-cooled 440C bearing steels in an oxygen environmentThis paper presents up-to-date findings of the research being conducted to understand the mechanism of sliding wear in unlubricated 440C bearing steels under oxidative conditions. A sliding wear test rig has been designed and built with a cylinder-on-flat geometry. The equipment is capable of testing specimens under high axial loads and sliding speeds in a simulated LOX environment. Samples of 440C steel, quenched and tempered to a hardness of Rc 56, were tested under a load of 890 N and a sliding speed of 2.05 m/sec for total sliding distances of up to 5.54 km. Flash temperatures during these tests were measured with an IR camera and a fast digital recorder. Microstructural and microanalytical data from the worn surfaces and the debris particles are analyzed extensively, along with wear rates, flash temperatures, surface profiles, hardnesses, and residual stresses, in the context of oxidation and wear theories.
Document ID
19890046078
Document Type
Conference Paper
Authors
Chaudhuri, Dilip K. (Tennessee State Univ. Nashville, TN, United States)
Verma, Ravi (Tennessee State University Nashville, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
MECHANICAL ENGINEERING
Meeting Information
Engineered Materials for Advanced Friction and Wear Applications(Gaithersburg, MD)
Funding Number(s)
CONTRACT_GRANT: NAG8-87
CONTRACT_GRANT: NAG8-22
Distribution Limits
Public
Copyright
Other