The role of minor alloying in the plasticity of bulk metallic glasses

Hilke, Sven; Rösner, Harald; Wilde, Gerhard

doi:10.1016/j.scriptamat.2020.06.070

Cited by 22 publications

(16 citation statements)

References 67 publications

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“…A second glass transition accompanied by an exothermic peak in the supercooled liquid was reported for Pd 42.5 Ni 42.5 P 15 61 and has been related to MRO ordering phenomena. It can be hypothesized that the observation in the present study may also be an ordering phenomenon, yet of extremely thermally stable MRO 6,8,13,75 .…”

Section: A Calorimetric Observations By Dsc and Ppmsmentioning

confidence: 65%

“…FEM is a microscopic technique which has been shown to be sensitive to higher order correlation functions such as g 3 and g 4 and hence to MRO in disordered materials 7,8,20,23,[26][27][28][29][30][31]46 . A statistical analysis of the diffracted intensities I( k, R, r) from nanometer-sized volumes was used by utilizing STEM microdiffraction 25 , where k is the scattering vector, R is the probe size and r is the position on the sample.…”

Section: Methodsmentioning

confidence: 99%

“…3a reveals two "plateaus" in accordance with Refs. 8,46,54 . In comparison to the "as-cast" and "as-cast + annealed 561 K for 2 h" states (see Fig.…”

Section: Fluctuation Electron Microscopymentioning

confidence: 99%

“…1b are different above the annealing temperature. As a consequence, the differences need to originate from different atomic arrangements rather than the absolute amount of excess free volume, defining the structural heterogeneity 7,8 . This motivates a detailed investigation of the amorphous structure, here characterized with respect to the MRO, in order to relate structural changes to the calorimetric signals.…”

Section: A Calorimetric Observations By Dsc and Ppmsmentioning

confidence: 99%

“…Eutectic alloys, such as Pd 40 Ni 40 P 20 having a deep melting point, are predestined to produce bulk metallic glasses (BMGs) since slower cooling rates (∼ 10 1 K/s) lead to the desired glassy state [1][2][3][4] . Moreover, Pd 40 Ni 40 P 20 exhibits good glass-forming ability [3][4][5] and mechanical properties (ductility) [6][7][8] . Depending on the cooling rate, the cast-material inherently attains variations of local atomic structures corresponding to higher and lower energy states 9 .…”

Section: Introductionmentioning

confidence: 99%

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Impact of Severe Deformation by HPT at Room Temperature on the Relaxation of the Glassy and the Supercooled Liquid States of PdNiP

et al. 2019

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The impact of severe plastic deformation by high-pressure torsion on the relaxation of the glassy and supercooled liquid states of Pd 40 Ni 40 P 20 was investigated using a combination of differential scanning calorimetry, low-temperature heat capacity and fluctuation electron microscopy. The changes in the calorimetric signals due to deformation and subsequent heat treatments were analyzed and a correlation between deformation (rejuvenation) and annealing (relaxation) was found in relation to medium-range order (MRO). Moreover, a coupling between the occurrence of an exothermic peak in the supercooled liquid state and specific changes in the MRO types were identified. These findings are comprehended in a potential energy landscape scheme offering a new approach for MRO engineering of glasses.

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Section: A Calorimetric Observations By Dsc and Ppmsmentioning

confidence: 65%

Section: Methodsmentioning

confidence: 99%

“…3a reveals two "plateaus" in accordance with Refs. 8,46,54 . In comparison to the "as-cast" and "as-cast + annealed 561 K for 2 h" states (see Fig.…”

Section: Fluctuation Electron Microscopymentioning

confidence: 99%

Section: A Calorimetric Observations By Dsc and Ppmsmentioning

confidence: 99%