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Plastic instability in amorphous selenium near its glass transition temperature

Published online by Cambridge University Press:  31 January 2011

Caijun Su ,
James A. LaManna ,
Yanfei Gao ,
Warren C. Oliver  and
George M. Pharr
James A. LaManna*
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996
Yanfei Gao*
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996; and Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Warren C. Oliver
Affiliation:
Nanomechanics Inc., Oak Ridge, Tennessee 37830
George M. Pharr
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996; and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
*
a)Present address: Alliant Techsystems Inc., Elkton, MD 21921.
b)Address all correspondence to this author. e-mail: ygao7@utk.edu
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Abstract

The deformation behavior of amorphous selenium near its glass transition temperature (31 °C) has been investigated by uniaxial compression and nanoindentation creep tests. Cylindrical specimens compressed at high temperatures and low strain rates deform stably into barrel-like shapes, while tests at low temperatures and high strain rates lead to fragmentation. These results agree well with stress exponent and kinetic activation parameters extracted from nanoindentation creep tests using a similarity analysis. The dependence of the deformation modes on temperature and strain rate can be understood as a consequence of material instability and strain localization in rate-dependent solids.

Keywords

NanoindentationHardnessAmorphous
Type
Materials Communications
Information
Journal of Materials Research , Volume 25 , Issue 6 , June 2010 , pp. 1015 - 1019
Copyright
Copyright © Materials Research Society 2010

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References

REFERENCES

1.Oliver, W.C., Pharr, G.M.An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mater. Res. 7, 1564 (1992)CrossRefGoogle Scholar
2.Gao, Y.F., Lucas, B.N., Hay, J.C., Oliver, W.C., Pharr, G.M.Nanoscale incipient asperity sliding and interface micro-slip assessed by the measurement of tangential contact stiffness. Scr. Mater. 55, 653 (2006)CrossRefGoogle Scholar
3.Poisl, W.H., Oliver, W.C., Fabes, B.D.The relationship between indentation and uniaxial creep in amorphous selenium. J. Mater. Res. 10, 2024 (1995)CrossRefGoogle Scholar
4.Tang, B., Ngan, A.H.W.Investigation of viscoelastic properties of amorphous selenium near glass transition using depth-sensing indentation. Soft Mater. 2, 125 (2004)CrossRefGoogle Scholar
5.LaManna, J.A. Ph.D. Thesis University of Tennessee, Knoxville, TN (2006)Google Scholar
6.Mayo, M.J., Nix, W.D.A micro-indentation study of superplasticity in Pb, Sn, and Sn–38wt%Pb. Acta Metall. 36, 2183 (1988)Google Scholar
7.Bower, A.F., Fleck, N.A., Needleman, A., Ogbonna, N.Indentation of a power law creeping solid. Proc. R. Soc. London, Ser. A 441, 97 (1993)Google Scholar
8.Lucas, B.N., Oliver, W.C.Indentation power-law creep of high-purity indium. Metall. Mater. Trans. A 30, 601 (1999)Google Scholar
9.Liu, F.X., Gao, Y.F., Liaw, P.K.Rate-dependent deformation behavior of Zr-based metallic-glass coatings examined by nanoindentation. Metall. Mater. Trans. A 39, 1862 (2008)Google Scholar
10.Gao, Y.F., Xu, H.T., Oliver, W.C., Pharr, G.M.Effective elastic modulus of film-on-substrate systems under normal and tangential contact. J. Mech. Phys. Solids 56, 402 (2008)CrossRefGoogle Scholar
11.Wang, C.L., Zhang, M., Nieh, T.G.Nanoindentation creep of nanocrystalline nickel at elevated temperatures. J. Phys. D: Appl. Phys. 42, 115405 (2009)CrossRefGoogle Scholar
12.Li, H., Ngan, A.H.W.Size effects of nanoindentation creep. J. Mater. Res. 19, 513 (2004)Google Scholar
13.Rudnicki, J.W., Rice, J.R.Conditions for the localization of deformation in pressure-sensitive dilatants materials. J. Mech. Phys. Solids 23, 371 (1975)CrossRefGoogle Scholar
14.Rice, J.R.Theoretical and Applied Mechanics edited by W.T. Koiter (North-Holland, Amsterdam 1977)207220Google Scholar
15.Needleman, A.Material rate dependence and mesh sensitivity in localization problems. Comput. Meth. Appl. Mech. Eng. 67, 69 (1988)Google Scholar
16.Spaepen, F.A microscopic mechanism for steady state inhomogeneous flow in metallic glasses. Acta Metall. 25, 407 (1977)Google Scholar
17.Argon, A.S.Plastic deformation in metallic glass. Acta Metall. 27, 47 (1979)Google Scholar
18.Gao, Y.F.An implicit finite element method for simulating inhomogeneous deformation and shear bands of amorphous alloys based on the free-volume model. Modell. Simul. Mater. Sci. Eng. 14, 1329 (2006)CrossRefGoogle Scholar
19.Gao, Y.F., Yang, B., Nieh, T.G.Thermomechanical instability analysis of inhomogeneous deformation in amorphous alloys. Acta Mater. 55, 2319 (2007)CrossRefGoogle Scholar
20.Yang, B., Wadsworth, J., Nieh, T.G.Thermal activation in Au-based bulk metallic glass characterized by high-temperature nanoindentation. Appl. Phys. Lett. 90, 061911 (2007)Google Scholar
21.Pan, D., Inoue, A., Sakurai, T., Chen, M.W.Experimental characterization of shear transformation zones for plastic flow of bulk metallic glasses. Proc. Natl. Acad. Sci. U.S.A. 105, 14769 (2008)Google Scholar