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.
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References
K.L. Ngai, in Non-Debye Relaxation in Condensed Matter, edited by T.V. Ramakrishnan and M. Raj Lakshmi (World Scientific, Singapore, 1987), p. 23.
D. Suh and R.H. Dauskardt, Scripta. Mater. 42, 233 (2000).
D. Suh and R.H. Dauskardt, Mater. Trans. JIM 42, 638 (2001).
D. Suh and R.H. Dauskardt, Mater. Sci. Eng. A 319–321, 480 (2001).
D. Suh, P. Asoka-Kumar, and R.H. Dauskardt, Acta Mater. 50, 537 (2002).
C.C. Aydiner, E. U¨stu¨ndag, and J.C. Hanan, Metall. Mater. Trans. 32A, 2709 (2001).
A. Peker and W.L. Johnson, Appl. Phys. Lett. 63, 2342 (1993).
R. Bush, E. Bakke, and W.L. Johnson, Acta Mater. 46, 4725 (1998).
C.T. Moynihan, L.P. Boesch, and N.L. Laberge, Phys. Chem. Glasses 14, 122 (1973).
F. Spaepen and A.I. Taub, in Amorphous Metallic Alloys, edited by F.E. Luborsky (Butterworths, London, U.K., 1983), p. 231.
C.T. Moynihan, in Assignment of the Glass Transition, edited by R.J. Seyler (American Society for Testing and Materials, Philadelphia, PA, 1994), p. 32.
N.G. McCrum, B.E. Read, and G. Williams, Anelastic and Dielectric Effects in Polymer Solids (John Wiley & Sons, London, United Kingdom, 1967).
E. Budke, P. Fielitz, M-P. Macht, V. Naundorf, and G. Frohberg, Defect Diffus. Forum 143–147, 825 (1997).
A. Masuhr, T.A. Waniuk, R. Busch, and W.L. Johnson, Phys. Rev. Lett. 82, 2290 (1999).
M.D. Ediger, C.A. Angell, and S.R. Nagel, J. Phys. Chem. 100, 13200 (1996).
F. Spaepen, in Physics of Defects, edited by R. Balian, M. Kleman, and J-P. Poirier (North-Holland, Amsterdam, The Netherlands, 1980), p. 136.
I.L. Hopkins and C.R. Kurkjian, in Physical Acoustics, edited by W.P. Mason (Academic Press, New York, 1965), p. 91.
C.A. Angell, Chem. Rev. 90, 523 (1990).
R. Maddin and T. Masumoto, Mater. Sci. Eng. 9, 153 (1972).
J. Logan and M.F. Ashby, Acta Metall. 22, 1047 (1974).
D. Suh and R.H. Dauskardt, Annales de Chímie-Science des Materiaux (2002, to be submitted).
T. Egami, in Amorphous Metallic Alloys, edited by F.E. Luborsky (Butterworths, London, United Kingdom, 1983), p. 100.
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Suh, D., Dauskardt, R.H. Mechanical relaxation time scales in a Zr-Ti-Ni-Cu-Be bulk metallic glass. Journal of Materials Research 17, 1254–1257 (2002). https://doi.org/10.1557/JMR.2002.0188
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DOI: https://doi.org/10.1557/JMR.2002.0188