In situ friction and wear measurements of ion implanted 304 stainless steel in nitrogen and oxygen ambients

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5047187

Pope, L E; Knapp, J A; Follstaedt, D M

The dual ion implantation of Ti and C (4.6 x 10/sup 17/ Ticm/sup 2/ at 180 keV followed by 2.0 x 10/sup 17/ Ccm/sup 2/ at 50 keV) into 304 stainless steel has been found to reduce friction and wear in vacuum, oxygen and air environments. This treatment produces an amorphous matrix with embedded TiC precipitates within the implanted layer. Unlubricated friction measurements and wear track analyses were completed in situ in a scanning Auger microprobe using a 440C pin at a Hertzian contact stress three times the bulk yield strength of umimplanted 304. In ultrahigh vacuum the friction coefficient was reduced from 1.2 to 0.6 to 0.8, while the wear track width decreased from 414 to 325 ..mu..m at 5000 cycles. For partial pressure of 2.1 x 10/sup -5/ Pa of oxygen, almost the same reductions in friction and wear were obtained as in air: ion implantation decreased the friction coefficient from 1.10 to .65 and the wear track width from 319 to 198 ..mu..m at 5000 cycles, as compared to decreases of 1.0 to 0.5 and 255 to 190 ..mu..m, respectively, in air. Such decreases were not observed in nitrogen ambients, although the results in nitrogen were similar to those in ultrahigh vacuum. Friction coefficients and the analyses of wear track compostions indicate that oxidation fo the implanted layer during sliding is important for reducing friction. 18 refs., 2 figs., 3 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5047187
• Report Number(s): SAND-87-2798C; CONF-880488-3; ON: DE88008792
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
CARBIDES
CARBON COMPOUNDS
CARBON IONS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ENERGY RANGE
FRICTION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
ION IMPLANTATION
IONS
IRON ALLOYS
IRON BASE ALLOYS
KEV RANGE
MATERIALS
MECHANICAL PROPERTIES
MICROANALYSIS
NICKEL ALLOYS
OXIDATION
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TITANIUM IONS
TRANSITION ELEMENT COMPOUNDS
WEAR RESISTANCE