Hostname: page-component-77c89778f8-gq7q9 Total loading time: 0 Render date: 2024-07-21T22:49:36.105Z Has data issue: false hasContentIssue false
  • English
  • Français

Mechanical Relaxation Time Scales in a Zr–Ti–Ni–Cu–Be Bulk Metallic Glass

Published online by Cambridge University Press:  31 January 2011

Daewoong Suh  and
Reinhold H. Dauskardt
Daewoong Suh
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, California 94305–2205
Reinhold H. Dauskardt
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, California 94305–2205
Get access

Abstract

The relaxation time scales in a commercial-grade Zr41.25Ti13.75Ni10Cu12.5Be22.5 (at.%) bulk metallic glass were examined using transient and dynamic mechanical experiments. The viscoelastic and sub-Tg relaxations were well described by the Kohlrausch–Williams–Watts relaxation function. A large activation energy (4.0 eV) and small nonexponentiality parameter (approximately 0.5) were observed for viscoelastic relaxation above Tg consistent with the cooperative nature of atomic movements leading ultimately to viscous flow. Conversely, a small activation energy (0.1 eV) and large nonexponentiality parameter (approximately 0.9) were observed for the sub-Tg relaxation suggesting localized atomic adjustments which may involve different structural units or mechanisms. The glass transition was manifested as a decoupling of the sub-Tg and viscoelastic relaxation. The resulting transition temperature determined at a selected time scale was in agreement with the value obtained from calorimetric studies.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 6 , June 2002 , pp. 1254 - 1257
Copyright
Copyright © Materials Research Society 2002

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.Ngai, K.L., in Non-Debye Relaxation in Condensed Matter, edited by Ramakrishnan, T.V. and Lakshmi, M. Raj (World Scientific, Singapore, 1987), p. 23.Google Scholar
2.Suh, D. and Dauskardt, R.H., Scripta. Mater. 42, 233 (2000).CrossRefGoogle Scholar
3.Suh, D. and Dauskardt, R.H., Mater. Trans. JIM 42, 638 (2001).CrossRefGoogle Scholar
4.Suh, D. and Dauskardt, R.H., Mater. Sci. Eng. A 319–321, 480 (2001).CrossRefGoogle Scholar
5.Suh, D., Asoka-Kumar, P., and Dauskardt, R.H., Acta Mater. 50, 537 (2002).CrossRefGoogle Scholar
6.Aydiner, C.C., U¨stu¨ndag, E., and Hanan, J.C., Metall. Mater. Trans. 32A, 2709 (2001).CrossRefGoogle Scholar
7.Peker, A. and Johnson, W.L., Appl. Phys. Lett. 63, 2342 (1993).CrossRefGoogle Scholar
8.Bush, R., Bakke, E., and Johnson, W.L., Acta Mater. 46, 4725 (1998).CrossRefGoogle Scholar
9.Moynihan, C.T., Boesch, L.P., and Laberge, N.L., Phys. Chem. Glasses 14, 122 (1973).Google Scholar
10.Spaepen, F. and Taub, A.I., in Amorphous Metallic Alloys, edited by Luborsky, F.E. (Butterworths, London, U.K., 1983), p. 231.CrossRefGoogle Scholar
11.Moynihan, C.T., in Assignment of the Glass Transition, edited by Seyler, R.J. (American Society for Testing and Materials, Philadelphia, PA, 1994), p. 32.CrossRefGoogle Scholar
12.McCrum, N.G., Read, B.E., and Williams, G., Anelastic and Dielectric Effects in Polymer Solids (John Wiley & Sons, London, United Kingdom, 1967).Google Scholar
13.Budke, E., Fielitz, P., Macht, M-P., Naundorf, V., and Frohberg, G., Defect Diffus. Forum 143–147, 825 (1997).CrossRefGoogle Scholar
14.Masuhr, A., Waniuk, T.A., Busch, R., and Johnson, W.L., Phys. Rev. Lett. 82, 2290 (1999).CrossRefGoogle Scholar
15.Ediger, M.D., Angell, C.A., and Nagel, S.R., J. Phys. Chem. 100, 13200 (1996).CrossRefGoogle Scholar
16.Spaepen, F., in Physics of Defects, edited by Balian, R., Kleman, M., and Poirier, J-P. (North-Holland, Amsterdam, The Netherlands, 1980), p. 136.Google Scholar
17.Hopkins, I.L. and Kurkjian, C.R., in Physical Acoustics, edited by Mason, W.P. (Academic Press, New York, 1965), p. 91.Google Scholar
18.Angell, C.A., Chem. Rev. 90, 523 (1990).CrossRefGoogle Scholar
19.Maddin, R. and Masumoto, T., Mater. Sci. Eng. 9, 153 (1972).CrossRefGoogle Scholar
20.Logan, J. and Ashby, M.F., Acta Metall. 22, 1047 (1974).CrossRefGoogle Scholar
21.Suh, D. and Dauskardt, R.H., Annales de Chímie-Science des Materiaux (2002, to be submitted).Google Scholar
22.Egami, T., in Amorphous Metallic Alloys, edited by Luborsky, F.E. (Butterworths, London, United Kingdom, 1983), p. 100.CrossRefGoogle Scholar