Hostname: page-component-7c8c6479df-995ml Total loading time: 0 Render date: 2024-03-28T09:57:30.042Z Has data issue: false hasContentIssue false

Experimental Studies and Molecular Dynamics Simulations of the Sliding Contact of Metallic Glass

Published online by Cambridge University Press:  17 March 2011

Xi-Yong Fu
Affiliation:
Materials Science and Engineering, The Ohio State University, Columbus, 43210 OH, U.S.A.
Michael L. Falk
Affiliation:
Materials Science and Engineering, University of Michigan, Ann Arbor, 48109 MI, U.S.A.
David A. Rigney
Affiliation:
Materials Science and Engineering, The Ohio State University, Columbus, 43210 OH, U.S.A.
Get access

Abstract

Tribological properties of bulk metallic glass Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 were studied experimentally using a pin/disk geometry without lubrication. Experimental observations were compared with 2D molecular dynamics simulations of amorphous material in sliding contact. The friction coefficient and the wear rate of bulk metallic glass (BMG) depend on normal load and test environment. The sliding of annealed BMG re-amorphizes devitrified material. A mechanically mixed layer is generated during sliding; this layer has enhanced oxygen content if the sliding is in air. The MD simulations show that atomic scale mixing occurs across the sliding interface. The growth kinetics of the mixing process scales with the square root of time. In the simulations, a low density region is generated near the sliding interface; it corresponds spatially to the softer layer detected in experiments. Subsurface displacement profiles produced by sliding and by simulation are very similar and are consistent with the flow patterns expected from a simple Navier-Stokes analysis when the stress state involves both compression and shear.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Johnson, W. L., MRS Bulletin 24, 4256 (1999).Google Scholar
2. Inoue, A., Acta Mater. 48, 279306 (2000).Google Scholar
3. Blau, P. J., Int'l. Conf. Wear of Materials 2001 and to be published in Wear (2001).Google Scholar
4. Bowden, F. P. and Tabor, D., The Friction and Lubrication of Solids (Oxford University Press, Oxford, 1964), vol. 2.Google Scholar
5. Sagel, A., Sieber, H., Fecht, H.-J. and Perepezko, J. H., Acta Mater. 46, 42334241 (1998).Google Scholar
6. Calka, A. and Radlinski, A. P., Materials Science and Engineering A118, 131135 (1989).Google Scholar
7. Koch, C. C., Deformation and Fracture of Amorphous, Nanocrystalline and Amorphous / Nano- crystalline materials, Chung, Y.-W., Dunand, D. C., Liaw, P. K., Olson, G. B., Eds., Advanced Materials for the 21st Century: The 1999 Julia R. Weertman Symposium (The Minerals, Metals & Materials Society, 1999).Google Scholar
8. Lancon, F., Billard, L. and Chaudhari, P., Europhys. Lett. 2, 625629 (1986).Google Scholar
9. Fu, X.-Y., Falk, M. L. and Rigney, D. A., Int'l. Conf. Wear of Materials 2001 and to be published in Wear (2001).Google Scholar
10. Rigney, D. A., Wear 245, 19 (2000).Google Scholar
11. Rigney, D. A., Mat Res Innovat. 1, 231234 (1998).Google Scholar
12. Rainforth, W. M., Wear 245, 162177 (2000).Google Scholar
13. Argon, A., Acta Met. 27, 4758 (1979).Google Scholar