The joint effect of surface microtopography and near-surface structure on microcontact conditions

Technical Report · Sun Jan 01 04:00:00 EST 1989

DOI:https://doi.org/10.2172/5059480· OSTI ID:5059480

McCool, J. I.

Pin-on-disk tests are now complete on all 27 ceramic Phase I specimens. The relationship between measured pin wear and both mean asperity flash temperature and mean real contact stress is examined for the subset of tests that was run at high sliding speed. Fracture indentation tests were completed at the University of Michigan on a second set of 9 ceramic specimens. The last set of nine specimens for indentation testing have been delivered to the University of Michigan. A total of 45 hardened M50 high alloy steel disks have been coated with WC, TiC and TiN and comprehensive surface roughness measurements have been made. A number of 3/8 in. diameter balls have been similarly coated. These balls will serve as the pin element in pin-on-disk tests to be performed at ORNL. Nonlinear curve fits were made to a series of correction factors that account for the presence of a coating in computing the load and area of spherical asperities. The fitted functions have been incorporated into a simulation model for analyzing the behavior of coated asperities. Example calculations are given for a steel substrate with the coating modulus spanning the range from 1/10 to 10 times the substrate modulus. 3 figs., 3 tabs.

• Research Organization: MRC Bearings, Jamestown, NY (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC02-87CE90001
• OSTI ID: 5059480
• Report Number(s): DOE/CE/90001-7; ON: DE90006494
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALLOYS
CERAMICS
COMPARATIVE EVALUATIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
DOCUMENT TYPES
FRACTURE MECHANICS
FRICTION
INTERFACES
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICS
MODIFICATIONS
PRESSURE EFFECTS
PROGRESS REPORT
R CODES
ROUGHNESS
SIMULATION
SLIDING FRICTION
STEELS
SURFACE PROPERTIES
TESTING
TRIBOLOGY
VALIDATION
WEAR