Fracture toughness and crack-resistance curve behavior in metallic glass-matrix composites
- Fracture toughness and crack-resistance curve behavior in metallic glass-matrix composites
- Launey, ME; Hofmann, DC; 서진유; Kozachkov, H; Johnson, WL; Ritchie, RO
- beryllium alloys; composite materials; copper alloys; cracks; fracture toughness; metallic glasses; niobium alloys; titanium alloys; zirconium alloys
- Issue Date
- Applied physics letters
- VOL 94, NO 24, 241910-1-241910-3
- 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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