Tribological studies of ion-implanted steel constituents

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5403184

Wei, Ronghau

Tribological properties of ion-implanted ferrite and austenite were studied systematically using a unique oscillating pin-on-disc wear tester. Results show that nitrogen implantation at elevated temperatures to high doses dramatically improves the adhesive wear resistance of ferrite and the critical load at which the adhesive wear mechanism changes from mild to severe for austenite. The wear resistance of nitrogen-implanted ferrite is determined by the nitride formed. Extremely hard solid solutions of nitrogen develop on the implanted austenite surfaces and induce three orders of magnitude reductions in wear rates. The implantation conditions that should be used to produce deep, wear-resistant layers for both steels are discussed in detail. Oscillating pin-on-disc wear tests demonstrate that nitrogen does not diffuse during the wearing process although tests conducted using conventional fixed pin-on-disc test equipment could erroneously suggest this occurs. Taken together, the results show that high-dose-rate implantation at low energies yields very-high-quality implanted surfaces at low cost.

• Research Organization: Colorado State Univ., Fort Collins, CO (United States)
• OSTI ID: 5403184
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
AUSTENITE
BEAMS
CARBON ADDITIONS
CHARGED PARTICLES
DISPERSIONS
FERRITE
ION BEAMS
ION IMPLANTATION
IONS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
IRON NITRIDES
MECHANICAL PROPERTIES
MIXTURES
NITRIDES
NITROGEN COMPOUNDS
NITROGEN IONS
PNICTIDES
SOLID SOLUTIONS
SOLUTIONS
STEELS
TRANSITION ELEMENT COMPOUNDS
TRIBOLOGY
WEAR RESISTANCE