Microstructural studies of crystallization of a Zr-based bulk metallic glass

Pekarskaya, E.; Löffler, Jörg F.; Johnson, William L.

doi:10.1016/s1359-6454(03)00225-8

Cited by 101 publications

(60 citation statements)

References 29 publications

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“…10 Figure 4(b) shows DSC traces of the BMG as-cast and after machining by AWJ, at various feed rates, and EDM at 380 A (representative of DSC for all EDM conditions). The as-cast BMG shows similar results to those reported elsewhere for the same composition (including the dual overlapping peaks during primary crystallization, which are due to nanometer scale heterogeneities 18 ). No changes outside of experimental uncertainty can be seen for the machined samples, further supporting the claim that AWJ is nondestructive.…”

Section: Resultssupporting

confidence: 85%

Abrasive waterjet machining of three-dimensional structures from bulk metallic glasses and comparison with other techniques

et al. 2012

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Bulk metallic glasses (BMGs) are a promising class of engineering materials, but they can be difficult to machine due to high hardness and a metastable structure. Crystallization due to machining can have negative effects, such as a decreased load-bearing capacity of fabricated parts, and thus should be avoided. Here, a Zr-based BMG was machined using abrasive waterjet (AWJ), electrical discharge, ns-pulsed laser engraving, and conventional dry-milling techniques. Characterization of the processed material indicated that AWJ preserves the amorphous phase and provides the combination of speed and flexibility required to rapidly fabricate small threedimensional parts, while the other techniques did not achieve these goals. As proof-of-principle, a screw, similar to an orthopedic implant, was rapidly machined from the BMG using AWJ.

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Section: Resultssupporting

confidence: 85%

Abrasive waterjet machining of three-dimensional structures from bulk metallic glasses and comparison with other techniques

et al. 2012

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“…Since the advent of multicomponent bulk metallic glasses (BMGs) in the early 1990s, the stability of their glass-forming liquids with respect to crystallization have been extensively investigated owing to its scientific and technological importance [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Despite substantial dedicated effort, one question yet to be resolved is why some BMGs exhibit a high crystallization resistance while others do not [12,15].…”

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confidence: 99%

Atomic-Scale Structural Evolution and Stability of Supercooled Liquid of a Zr-Based Bulk Metallic Glass

et al. 2011

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In this Letter, direct experimental evidence is provided for understanding the thermal stability with respect to crystallization in the Zr 41:2 Ti 13:8 Cu 12:5 Ni 10 Be 22:5 glass-forming liquid. Through high-resolution transmission electron microscopy, the atomic-structure evolution in the glass-forming liquid during the isothermal annealing process is clearly revealed. In contrast with the existing theoretical models, our results reveal that, prior to nanocrystallization, there exists a metastable state prone to forming icosahedralike atomic clusters, which impede the subsequent crystallization and hence stabilize the supercooled liquid. The outcome of the current research underpins the topological origin for the excellent thermal stability displayed by the Zr-based bulk metallic glass.

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“…This can be ascribed to the enhancement of the short-range order in the phase-separation amorphous alloy. The reduction in the width of the diffraction peak was observed by Pekarskaya et al 24 in the splat-cooled Zr 52.5 Ti 5 Cu 17.9 Ni 14.6 Al 10 glass when the phase separation occurred during annealing. Comparing the insets of Figs.…”

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confidence: 70%

Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass

Cao

Zhou

et al. 2005

Applied Physics Letters

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Microstructural studies of crystallization of a Zr-based bulk metallic glass

Cited by 101 publications

References 29 publications

Abrasive waterjet machining of three-dimensional structures from bulk metallic glasses and comparison with other techniques

Abrasive waterjet machining of three-dimensional structures from bulk metallic glasses and comparison with other techniques

Atomic-Scale Structural Evolution and Stability of Supercooled Liquid of a Zr-Based Bulk Metallic Glass

Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass

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