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Synthesis and mechanical properties of highly structure-controlled Zr-based metallic glasses by thermal rejuvenation technique

A novel thermal rejuvenation treatment facility for Zr-based bulk metallic glass (BMG) was developed, consisting of a rapid heating and indirect liquid nitrogen quenching process. The re-introduction of free volume into thermally rejuvenated BMG results in more disordered state. The rejuvenation improves ductility, implying that the re-introduced free volume aids in the recovery of the shear transformation zone (STZ) site and volume. Actually, it is confirmed that relaxation significantly reduces STZ volume; however, it is recovered by thermal rejuvenation. Molecular dynamics (MD) simulations also indicate that rejuvenation enhances homogeneous deformation. The current findings indicate that the thermal rejuvenation method is extremely effective for recovering or improving the ductility of metallic glass that has been lost due to relaxation.

 

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A new thermal rejuvenation treatment method for Zr-based BMG was developed, improving ductility by re-introducing free volume through rapid heating and indirect liquid nitrogen quenching, confirmed by molecular dynamics simulations to enhance homogeneous deformation by reducing the volume of STZ.

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S1312 STZ (Streptozotocin) STZ (Streptozotocin) is a glucosamine-nitrosourea compound derived from Streptomyces achromogenes, which is a DNA-methylating, carcinogenic, antibiotic and diabetes inducing agent. Streptozotocin induces autophagy and apoptosis. Streptozotocin (STZ) can be used to induce animal models of diabetes. Solutions are unstable and should be fresh-prepared.

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