Tough Hypoeutectic Zr-Based Bulk Metallic Glasses
Résumé
Significant softening of Zr-based bulk metallic glasses (BMGs) can be seen in a hypoeutectic Zr-enriched composition, which brings about very high toughness (for the Zr(55)Cu(35)Al(10) and Zr(60)Cu(30)Al(10) BMGs) and tensile plasticity at room temperature (for the Zr(70)Ni(16)Cu(6)Al(8) BMG). The unique features of such BMGs include the formation of multiple shear bands and harmonic alternating movements that can immediately accommodate concentrated stresses and avoid accidental catastrophic fracture.