Ductile to brittle transition in dynamic fracture of brittle bulk metallic glass

Journal Article · Thu May 01 00:00:00 EDT 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2912491· OSTI ID:21137239

Wang, G; Han, Y N; Han, B S; Wang, W H ^[1]; Xu, X H; Ke, F J ^[2]

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1. Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)
2. Department of Applied Physics, Beihang University, Beijing 100083 (China) and State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080 (China)

We report an unusual transition from a locally ductile to a pure brittle fracture in the dynamic fracture of brittle Mg{sub 65}Cu{sub 20}Gd{sub 10} bulk metallic glass. The fractographic evolution from a dimple structure to a periodic corrugation pattern and then to the mirror zone along the crack propagation direction during the dynamic fracture process is discussed within the framework of the meniscus instability of the fracture process zone. This work might provide an important clue in understanding of the energy dissipation mechanism for dynamic crack propagation in brittle glassy materials.

• OSTI ID: 21137239
• Journal Information: Journal of Applied Physics, Vol. 103, Issue 9; Other Information: DOI: 10.1063/1.2912491; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER ALLOYS
CRACK PROPAGATION
CRACKS
DUCTILE-BRITTLE TRANSITIONS
ENERGY LOSSES
FRACTURES
GADOLINIUM ALLOYS
MAGNESIUM ALLOYS
METALLIC GLASSES
PERIODICITY
TERNARY ALLOY SYSTEMS