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Fracture Mechanisms of Bulk Amorphous Metal under Impact Loading

Published online by Cambridge University Press:  17 March 2011

Takao Kobayashi
Affiliation:
Center for Fracture Physics SRI International 333 Ravenswood Avenue Menlo Park, CA 94025, U.S.A.
Donald A. Shockey
Affiliation:
Center for Fracture Physics SRI International 333 Ravenswood Avenue Menlo Park, CA 94025, U.S.A.
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Abstract

Advanced diagnostic instruments and analyses applied to failure surfaces and cross sections of bulk metallic glasses (BMGs) can provide insight into the deformation and failure of these materials and assist in prototyping new materials with improved failure resistance. Confocal- optics scanning laser microscopic analysis of conjugate fracture surface topographs suggests that the formation and stretching of ligaments are likely keys to the high impact toughness of Vitreloy.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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References

(1) Conner, R. D., Rosakis, A. J., Johnson, W. L., and Owen, D. M., “Fracture Toughness Determination for a Beryllium-Bearing Bulk Metallic Glass,” Scripta Materialia, Vol. 37, 9, pp. 13771378, 1997.Google Scholar
(2) Gilbert, C. J., Ritchie, R. O., and Johnson, W. L., “Fracture Toughness and Fatigue-Crack Propagation in a Zr-Ti-Ni-Cu-Be Bulk Metallic Glass,” Appl. Phys. Lett. 71 (4), pp. 476478, 28 July 1997.Google Scholar
(3) Owen, D. M., Rosakis, A. J., and Johnson, W. L., “Dynamic Failure Mechanisms in Beryllium-Bearing Bulk Metallic Glasses,” California Institute of Technology SM Report 98-22, December 1998.Google Scholar
(4) Flores, K. M., Suh, D., and Dauskardt, R. H., “Environmental and Stress State Effects on Fracture and Fatigue Crack-Growth in Zr-Ti-Ni-Cu-Be Bulk Amorphous Metals,” Mat. Res. Soc. Symp. Proc. Vol. 554, pp. 355360, 1999.Google Scholar
(5) Flores, K. M. and Dauskardt, R. H., “Enhanced Toughness due to Stable Crack Tip Damage Zones in Bulk Metallic Glass,” Scripta Materialia, Vol. 41, 9, pp. 937943, 1999.Google Scholar
(6) Lowhaphandu, P. and Lewandowski, J. J., Scripta Materialia, Vol. 38, 1881, 1998.Google Scholar
(7) Flores, K. M. and Dauskardt, R. H., “Local Heating Associated with Crack Tip Plasticity in Zr-Ti-Ni-Cu-Be Bulk Amorphous Metals,” J. Matr. Res. Vol. 14, No. 3, pp. 638643, 1999.Google Scholar
(8) Flores, K. M., Suh, D., and Dauskardt, R. H., Bulk Metallic Glasses, ed. Johnson, W. L., Liu, C. T., and Inoue, A., Materials Research Society Proceedings, Boston, MA 1998.Google Scholar
(9) Hays, C. C., Kim, C. P., and Johnson, W. L., “Microstructure Controlled Shear Band Pattern Formation and Enhanced Plasticity of Bulk Metallic Glasses Containing in-situ Formed Ductile Phase Dendrite Dispersions,” Physical Review Letters, Vol. 84, No. 13, pp. 29012904, 27 March 2000.Google Scholar
(10) Kobayashi, T. and Shockey, D. A., “FRASTA: A New Way to Analyze Fracture Surfaces, Part 1: Reconstructing Crack Histories,” Advanced Materials & Processes, 140, 5, pp. 2834, 1991.Google Scholar
(11) Kobayashi, T. and Shockey, D. A., “Fracture Analysis Via FRASTA, Part 2: Determining Fracture Mechanisms and Parameters,” Advanced Materials & Processes, 140, 6, pp. 2432 1991.Google Scholar
(12) Gilbert, G. J., Ager, J.W. III, Schroeder, V., Ritchie, R.O., Lloyd, J.P., and Graham, J.R., “Light Emission During Fracture of a Ze-Ti-Ni-Cu-Be Bulk Metallic Glass,” Applied Physics Letters, Vol. 74, No.25, pp. 38093811, 21 June 1999.Google Scholar