Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-17T18:04:46.098Z Has data issue: false hasContentIssue false
  • English
  • Français

Serrated flow behavior induced by blunt mechanism of shear crack propagation in metallic glass

Published online by Cambridge University Press:  26 July 2012

J.T. Fan ,
Z.F. Zhang ,
S.X. Mao ,
B.L. Shen  and
J. Eckert
Z.F. Zhang*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China
S.X. Mao
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China; and Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
J. Eckert
Affiliation:
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
*
a) Address all correspondence to these authors: e-mail: [email protected]
Get access

Abstract

We present a blunt mechanism to explain the serrated flow behavior and slight “work hardening” at the beginning of yielding during the compression of metallic glass, which is in line with the piling-up of parallel shear bands on the fracture surface with a gradually increasing space from the edge of surface to inside. Meanwhile, two intrinsic parameters, i.e., strength intensity of blunt behavior, , and global work-hardening sensitivity exponent, , are introduced to characterize the blunt effect on the net increase in flow stress or work-hardening behavior of metallic glass.

Keywords

AmorphousFractureToughness
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 2 , February 2009 , pp. 436 - 440
Copyright
Copyright © Materials Research Society 2009

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

REFERENCES

1.Pampillo, C.A.: Flow and fracture in amorphous alloys. J. Mater. Sci. 10, 1194 (1975)Google Scholar
2.Spaepen, F.: A microscopic mechanism for steady state inhomogeneous flow in metallic glasses. Acta Metall. 25, 407 (1977)Google Scholar
3.Donovan, P.E., Stobbs, W.M.: The structure of shear bands in metallic glasses. Acta Metall. 29, 1419 (1981)Google Scholar
4.Li, J., Spaepen, F., Hufnagel, T.C.: Nanometre-scale defects in shear bands in a metallic glass. Philos. Mag. A 82, 2623 (2002)Google Scholar
5.Chen, M., Inoue, A., Zhang, W., Sakurai, T.: Extraordinary plasticity of ductile bulk metallic glasses. Phys. Rev. Lett. 96, 245502 (2006)Google Scholar
6.Fu, X.L., Li, Y., Schuh, C.A.: Temperature, strain rate and reinforcement volume fraction dependence of plastic deformation in metallic glass matrix composites. Acta Mater. 55, 3059 (2007)Google Scholar
7.Dalla Torre, F.H., Dubach, A., Siegrist, M.E., Löffler, J.F.: Negative strain rate sensitivity in bulk metallic glass and its similarities with the dynamic strain aging effect during deformation. Appl. Phys. Lett. 89, 091918 (2006)CrossRefGoogle Scholar
8.Wu, F.F., Zhang, Z.F., Mao, S.X., Peker, A., Eckert, J.: Effect of annealing temperature on the mechanical properties and fracture mechanisms of a Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 bulk metallic glass composite. Phys. Rev. B: Condens. Matter. 75, 134201 (2007)Google Scholar
9.Zhang, Z.F., Zhang, H., Pan, X.F., Das, J., Eckert, J.: Effect of aspect ratio on the compressive deformation and fracture behaviour of Zr-based bulk metallic glass. Philos. Mag. Lett. 85, 513 (2005)Google Scholar
10.Szuecs, F., Kim, C.P., Johnson, W.L.: Mechanical properties of Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 ductile phase reinforced bulk metallic glass composite. Acta Mater. 49, 1507 (2001)CrossRefGoogle Scholar
11.Zhang, Z.F., Eckert, J.: Unified tensile fracture criterion. Phys. Rev. Lett. 94, 094301 (2005)Google Scholar
12.Zhang, Z.F., He, G., Eckert, J., Schultz, L.: Fracture mechanisms in bulk metallic glassy materials. Phys. Rev. Lett. 91, 045505 (2003)Google Scholar
13.Zhang, Z.F., Zhang, H., Shen, B.L., Inoue, A., Eckert, J.: Shear fracture and fragmentation mechanisms of bulk metallic glasses. Philos. Mag. Lett. 86, 643 (2006)Google Scholar
14.Flores, K.M., Dauskardt, R.H.: Fracture and deformation of bulk metallic glasses and their composites. Intermetallics 12, 1025 (2004)CrossRefGoogle Scholar
15.Yokoyama, Y., Yamano, K., Fukaura, K., Sunada, H., Inoue, A.: Ductility improvement of Zr55Cu30Al10Ni5 bulk amorphous alloy. Scr. Mater. 44, 1529 (2001)Google Scholar
16.Schuh, C.A., Lund, A.C., Nieh, T.G.: New regime of homogeneous flow in the deformation map of metallic glasses: Elevated temperature nanoindentation experiments and mechanistic modeling. Acta Mater. 52, 5879 (2004)Google Scholar
17.Zhang, Z.F., Eckert, J., Schultz, L.: Difference in compressive and tensile fracture mechanisms of Zr59Cu20Al10Ni8Ti3 bulk metallic glass. Acta Mater. 51, 1167 (2003)CrossRefGoogle Scholar
18.Fan, J.T., Wu, F.F., Zhang, Z.F., Jiang, F., Sun, J., Mao, S.X.: Effect of microstructures on the compressive deformation and fracture behaviors of Zr47Cu46Al7 bulk metallic glass composites. J. Non-Cryst. Solids 353, 4707 (2007)Google Scholar
19.Bei, H., Xie, S., George, E.P.: Softening caused by profuse shear banding in a bulk metallic glass. Phys. Rev. Lett. 96, 105503 (2006)Google Scholar
20.Zhang, Z.F., Eckert, J., Schultz, L.: Fatigue and fracture behavior of bulk metallic glass. Metall. Mater. Trans. A 35, 3489 (2004)Google Scholar
21.Wright, W.J., Saha, R., Nix, W.D.: Deformation mechanisms of the Zr40Ti14Ni10Cu12Be24 bulk metallic glass. Mater. Trans. 42, 642 (2001)Google Scholar