Elevated temperature tribology of cobalt and tantalum-based alloys

Scharf, T. W.; Prasad, S. V.; Kotula, P. G.; Michael, J. R.; Robino, C. V.

doi:10.1016/j.wear.2014.12.051

Elevated temperature tribology of cobalt and tantalum-based alloys

Journal Article · Tue Dec 30 23:00:00 EST 2014 · Wear

DOI:https://doi.org/10.1016/j.wear.2014.12.051· OSTI ID:1235348

Scharf, T. W. ^[1]; Prasad, S. V. ^[2]; Kotula, P. G. ^[2]; Michael, J. R. ^[2]; Robino, C. V. ^[2]

Univ. of North Texas, Denton, TX (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

This paper describes the friction and wear behavior of a Co–Cr alloy sliding on a Ta–W alloy. Measurements were performed in a pin-on-flat configuration with a hemispherically tipped Co-base alloy pin sliding on a Ta–W alloy flat from ambient to 430°C. Focused ion beam-scanning electron microscopy (FIB-SEM) and cross-sectional transmission electron microscopy (TEM) were used to identify the friction-induced changes to the chemistry and crystal structure in the subsurface regions of wear tracks. During sliding contact, transfer of material varied as a function of the test temperature, either from pin-to-flat, flat-to-pin, or both, resulting in either wear loss and/or volume gain. Friction coefficients (μ) and wear rates also varied as a function of test temperature. The lowest friction coefficient (μ=0.25) and wear rate (1×10^–4 mm³/N•m) were observed at 430°C in argon atmosphere. This was attributed to the formation of a Co-base metal oxide layer (glaze), predominantly (Co, Cr)O with Rocksalt crystal structure, on the pin surface. Part of this oxide film transferred to the wear track on Ta–W, providing a self-mated oxide-on-oxide contact. Once the oxide glaze is formed, it is able to provide friction reduction for the entire temperature range of this study, ambient to 430°C. Furthermore, the results of this study indicate that glazing the surfaces of Haynes alloys with continuous layers of cobalt chrome oxide prior to wear could protect the cladded surfaces from damage.

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1235348

Alternate ID(s):: OSTI ID: 1433746

Report Number(s):: SAND--2014-17398J; PII: S0043164815000046

Journal Information:: Wear, Journal Name: Wear Journal Issue: C Vol. 330-331; ISSN 0043-1648

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (15)

On the fcc → hcp transformation in a cobalt-base superalloy (Haynes alloy No. 25) Tawancy, H. M.; Ishwar, V. R.; Lewis, B. E. Journal of Materials Science Letters, Vol. 5, Issue 3 https://doi.org/10.1007/BF01748098	journal	March 1986
Solid lubricants: a review Scharf, T. W.; Prasad, S. V. Journal of Materials Science, Vol. 48, Issue 2 https://doi.org/10.1007/s10853-012-7038-2	journal	December 2012
Adhesive wear of nickel- and cobalt-base alloys Bhansali, K. J. Wear, Vol. 60, Issue 1 https://doi.org/10.1016/0043-1648(80)90251-3	journal	April 1980
The influence of phase transformations and oxidation on the galling resistance and low friction behaviour of a laser processed Co-based alloy Persson, D. H. E.; Jacobson, S.; Hogmark, S. Wear, Vol. 254, Issue 11 https://doi.org/10.1016/S0043-1648(03)00325-9	journal	October 2003
High-temperature sliding wear of metals Stott, F. H. Tribology International, Vol. 35, Issue 8 https://doi.org/10.1016/S0301-679X(02)00041-5	journal	August 2002
Deformation behavior of the cobalt-based superalloy Haynes 25: Experimental characterization and crystal plasticity modeling Knezevic, Marko; Carpenter, John S.; Lovato, Manuel L. Acta Materialia, Vol. 63 https://doi.org/10.1016/j.actamat.2013.10.021	journal	January 2014
Elevated-temperature tribology of metallic materials Blau, Peter J. Tribology International, Vol. 43, Issue 7 https://doi.org/10.1016/j.triboint.2010.01.003	journal	July 2010
Investigation into the wear behaviour of Stellite 6 during rotation as an unlubricated bearing at 600°C Wood, P. D.; Evans, H. E.; Ponton, C. B. Tribology International, Vol. 44, Issue 12 https://doi.org/10.1016/j.triboint.2011.02.011	journal	November 2011
A generic model for dry sliding wear of metals at elevated temperatures Jiang, Jiaren; Stott, F. H.; Stack, M. M. Wear, Vol. 256, Issue 9-10 https://doi.org/10.1016/j.wear.2003.09.005	journal	May 2004
Surface modifications in tribological contacts Jacobson, Staffan; Hogmark, Sture Wear, Vol. 266, Issue 3-4 https://doi.org/10.1016/j.wear.2008.04.035	journal	February 2009
Wear mechanisms and in-service surface modifications of a Stellite 6B Co–Cr alloy Sebastiani, M.; Mangione, V.; De Felicis, D. Wear, Vol. 290-291 https://doi.org/10.1016/j.wear.2012.05.027	journal	June 2012
Automated Analysis of SEM X-Ray Spectral Images: A Powerful New Microanalysis Tool Kotula, Paul G.; Keenan, Michael R.; Michael, Joseph R. Microscopy and Microanalysis, Vol. 9, Issue 1 https://doi.org/10.1017/S1431927603030058	journal	January 2003
Sliding Characteristics of Metals at High Temperatures Peterson, M. B.; Florek, J. J.; Lee, R. E. A S L E Transactions, Vol. 3, Issue 1 https://doi.org/10.1080/05698196008972392	journal	January 1960
Studies of the Unlubricated Wear of a Commercial Cobalt-Base Alloy at Temperatures up to about 400 C Dunckley, P. M.; Quinn, T. F. J.; Salter, J. A S L E Transactions, Vol. 19, Issue 3 https://doi.org/10.1080/05698197608982797	journal	January 1976
Friction and wear properties of Stellite 31 at temperatures from 293 to 1073K Stott, F. H.; Stevenson, C. W.; Wood, G. C. Metals Technology, Vol. 4, Issue 1 https://doi.org/10.1179/030716977803292169	journal	January 1977

Cited By (1)

Friction and Wear Characteristics of Single Crystal Ni-Based Superalloys at Elevated Temperatures Stoyanov, Pantcho; Dawag, Lesley; Goberman, Daniel G. Tribology Letters, Vol. 66, Issue 1 https://doi.org/10.1007/s11249-018-0994-1	journal	February 2018

Similar Records

Tribology of incoloy 800HT for nuclear reactors under helium environment at elevated temperatures

Journal Article · Wed Aug 21 00:00:00 EDT 2019 · Wear · OSTI ID:1848152

Tribological Behavior of Structural Materials in High Temperature Helium Gas-Cooled Reactor Environments

Technical Report · Tue Mar 31 00:00:00 EDT 2020 · OSTI ID:1608135

In situ friction, wear and electrical contact resistance of precious metal alloys

Conference · Tue Dec 31 23:00:00 EST 1985 · OSTI ID:6730110

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
cobalt alloys
glaze layer
high temperature wear
sliding wear
tantalum alloys

Elevated temperature tribology of cobalt and tantalum-based alloys

Citation Formats

References (15)

Cited By (1)

Similar Records

Related Subjects