Recently developed bulk metallic glass (BMG) alloys (Peker and Johnson, 1993) have attractive mechanical properties for structural applications: yield strength around 2 GPa, fracture toughness above 20 MPa ffiffiffiffi mp , good corrosion resistance and specific strength (Gilbert et al., 1993; Bruck et al., 1994; Waniuk et al., 2001). Unfortunately, BMGs fail catastrophically by formation of macroscopic shear bands during unconstrained deformation at room temperature (Gilbert et al., 1993; Bruck et al., 1994). To avoid this failure mode, BMG matrix composites have been developed where the reinforcements appear to inhibit the formation of a single, catastrophic shear band (Conner et al., 1998; Choi-Yim et al., 1999; Szuecs et al., 2001;Hays et al., 2001).
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