Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3156026
Keywords
beryllium alloys; composite materials; copper alloys; cracks; fracture toughness; metallic glasses; nickel alloys; niobium alloys; titanium alloys; zirconium alloys
Categories
Funding
- Office of Science
- Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
- U.S. Department of Energy [DE-AC02-05CH11231]
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Nonlinear-elastic fracture mechanics methods are used to assess the fracture toughness of bulk metallic glass (BMG) composites; results are compared with similar measurements for other monolithic and composite BMG alloys. Mechanistically, plastic shielding gives rise to characteristic resistance-curve behavior where the fracture resistance increases with crack extension. Specifically, confinement of damage by second-phase dendrites is shown to result in enhancement of the toughness by nearly an order of magnitude relative to unreinforced glass.
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