Synergy between tribo-oxidation and strain rate response on governing the dry sliding wear behavior of titanium.

Chelliah, Nagaraj and Kailas, Satish V (2009) Synergy between tribo-oxidation and strain rate response on governing the dry sliding wear behavior of titanium. In: Wear, 266 (7-8). pp. 704-712.

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Abstract

The present work provides an insight into the dry sliding wear behavior of titanium based on synergy between tribo-oxidation and strain rate response. Pin-on-disc tribometer was used to characterize the friction and wear behavior of titanium pin in sliding contact with polycrystalline alumina disk under ambient and vacuum condition. The sliding speed was varied from 0.01 to 1.4 ms(-1), normal load was varied from 15.3 to 76 N and with a sliding distance of 1500 m. It was seen that dry sliding wear behavior of titanium was governed by combination of tribo-oxidation and strain rate response in near surface region of titanium. Strain rate response of titanium was recorded by conducting uni-axial compression tests at constant true strain rate of 100 s(-1) in the temperature range from 298 to 873 K. Coefficient of friction and wear rate were reduced with increased sliding speed from 0.01 to 1.0 ms(-1). This is attributed to the formation of in situ self lubricating oxide film (TiO) and reduction in the intensity of adiabatic shear band cracking in the near surface region. This trend was confirmed by performing series of dry sliding tests under vacuum condition of 2 x 10(-4) Torr. Characterization tools such as optical microscopy, scanning electron microscopy, and X-ray diffractometer provided evidence of such processes. These experimental findings can be applied to enhance the dry sliding wear behavior of titanium with proper choice of operating conditions such as sliding speed, normal load, and environment.

Item Type:	Journal Article
Publication:	Wear
Publisher:	Elsevier
Additional Information:	Copyrights of this article belongs to Elsevier.
Keywords:	CP titanium; Polycrystalline alumina;Tribo-oxidation; Strain rate response;Pin-on-disc tribometer.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	18 Nov 2009 07:30
Last Modified:	19 Sep 2010 05:31
URI:	http://eprints.iisc.ac.in/id/eprint/20019

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