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We report the fatigue damage behavior of a Zr61Ti2Cu25Al12 (ZT1) bulk metallic glass (BMG), which was known to have a record-high fracture toughness. The ZT1 exhibits the highest fatigue endurance limit among all BMGs, with a normalized fatigue limit of σa=440MPa (in four-point bending at a loading ratio of 0.1), or ∼0.27 of its tensile strength. The crack-growth resistance in the stress/life tests...
For the emerging bulk metallic glasses (BMGs), damage tolerance is a key mechanical property needed for their practical applications. To reach a fracture toughness on a par with, or even better than, conventional engineering alloys, the only route reported so far is to compositionally base the BMG on high-cost palladium (Pd), which has a very high Poisson’s ratio (∼0.42). Here we report the discovery...
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