Tribology and surface mechanical properties of excimer laser nitrided titanium

Technical Report · Tue Nov 01 04:00:00 EST 1994

DOI:https://doi.org/10.2172/10194306· OSTI ID:10194306

Jervis, T R; Zocco, T G; Tesmer, J R ^[1]; Hirvonen, J P ^[2]

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1. Los Alamos National Lab., NM (United States). Materials Science and Technology Div.
2. Technical Research Inst. of Finland, Espoo (Finland). Metallurgy Lab.

The authors have nitrided Ti-6Al-4V alloys using excimer laser pulses at 1.2 J-cm{sup {minus}2} in high purity N{sub 2} at approximately one atmosphere. Substantial nitrogen and some oxygen incorporation resulted from multiple pulse processing. Formation of a TiN surface film was not observed. They have examined the tribological and mechanical properties of these surfaces using pin-on-disk and nanoindenter techniques respectively. Nitrogen alloying results in reduced friction and torque noise in the pin-on-disk measurements. At higher N concentrations, very little wear is observed, even after the friction behavior suggests surface deterioration. This is consistent with the formation of a transfer film at the sliding interface. Nanoindenter measurements of the surfaces show increasing hardness proportional to nitrogen incorporation. The tribological improvements can therefore be ascribed to a combination of increased surface hardness and tribochemical effects.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10194306
• Report Number(s): LA-UR--94-3656; CONF-941144--1; ON: DE95002751
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101
360102
360103
ALUMINIUM ALLOYS
EXPERIMENTAL DATA
LASER RADIATION
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
NITRIDATION
NITROGEN
PREPARATION AND FABRICATION
STRUCTURE AND PHASE STUDIES
SURFACE TREATMENTS
TITANIUM BASE ALLOYS
TITANIUM NITRIDES
TRIBOLOGY
VANADIUM ALLOYS
WEAR RESISTANCE