Micromechanical mechanism of yielding in dual nano-phase metallic glass

Li, F.C.; Wang, Tianyu; He, Quanfeng; Sun, Baoan; Guo, Chunyu; Feng, Tao; Yang, Yong

doi:10.1016/j.scriptamat.2018.05.050

Cited by 34 publications

(14 citation statements)

References 46 publications

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“…However, no improvement in plasticity was observed in Pd-Si nanoglasses compared to the corresponding melt-spun ribbons [11]. Similar results were also obtained in Ni-P nanoglasses prepared by electrodeposition [14]. An interesting observation here is that the effect of Article chemical segregation is found to be negligible in both Pd-Si and Ni-P nanoglasses.…”

Section: Introductionsupporting

confidence: 80%

“…Improved plasticity was also reported in Fe 90 Sc 10 nanocomposites where Fe nanocrystals were found to be distributed in the amorphous matrix [15]. Besides plasticity, significant variation of the yield strength was also reported in literature, with Cu-Zr and Sc 75 Fe 25 nanoglasses showing higher yield strength during nanoindentation, while Pd-Si and Ni-P showed lower yield strength during micro-pillar tests compared to their conventional amorphous counterparts [10,11,14,16].…”

Section: Introductionmentioning

confidence: 55%

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Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses

Nandam

Schwaiger

Kobler

et al. 2021

Journal of Materials Research

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Strain localization during plastic deformation drastically reduces the shear band stability in metallic glasses, ultimately leading to catastrophic failure. Therefore, improving the plasticity of metallic glasses has been a long-standing goal for several decades. In this regard, nanoglass, a novel type of metallic glass, has been proposed to exhibit differences in short and medium range order at the interfacial regions, which could promote the formation of shear transformation zones. In the present work, by introducing heterogeneities at the nanoscale, both crystalline and amorphous, significant improvements in plasticity are realized in micro-compression tests. Both amorphous and crystalline dispersions resulted in smaller strain bursts during plastic deformation. The yield strength is found to increase significantly in Cu–Zr nanoglasses compared to the corresponding conventional metallic glasses. The reasons for the mechanical behavior and the importance of nanoscale dispersions to tailor the properties is discussed in detail. Graphic Abstract

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Section: Introductionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 55%

Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses

Nandam

Schwaiger

Kobler

et al. 2021

Journal of Materials Research

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“…Nanoparticle-based models have also demonstrated an inherent connection between structural and chemical heterogeneities due to surface segregation prior to nanoparticle consolidation [10,11]. A range of unique properties in nanoglasses has been attributed to the presence of these interfacial regions [12,13,14] including improved mechanical performance relative to monolithic metallic glasses [15,16].…”

Section: Introductionmentioning

confidence: 99%

Interfacial plasticity governs strain delocalization in metallic nanoglasses

Cheng

Trelewicz

2019

J. Mater. Res.

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“…Recently, Wang et al (2015) investigated the mechanical properties of Sc 75 Fe 25 NG and HG nanopillars by using in situ tensile tests in a transmission electron microscope and found a similar trend in yield strength: the yield strength of the NG nanopillar is lower than that of the HG nanopillar with identical chemical composition. Strength softening was also observed in Ni 78 P 22 NG pillars prepared by the electrodeposition technique (Li et al, 2018).…”

Section: Size Effects On Young's Modulus and Yield Strengthmentioning

confidence: 86%

Mechanical Properties of Glassy Nanopillars: A Comparative, Computational Study of Size Effects in Nanoglasses and Homogeneous Bulk Glasses

Adjaoud

Albe

2020

Front. Mater.

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We study the mechanical properties of nanoglass (NG) nanopillars with diameters ranging from 4.5 to 54 nm by means of molecular dynamic simulations and compare the results with those obtained for nanopillars prepared from homogeneous glasses. NG nanopillars of two different types of glasses, namely, Cu 64 Zr 36 and Pd 80 Si 20 , were cut from samples prepared by nanoparticle consolidation. The influence of nanopillar diameter on the deformation behavior and strain localization is investigated. Moreover, cyclic loading is used to explore the origin of stress overshoots in the stress-strain curves of NGs. Finally, from the calculated properties, a deformation map for NG and homogeneous glass nanopillars is derived.

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Micromechanical mechanism of yielding in dual nano-phase metallic glass

Cited by 34 publications

References 46 publications

Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses

Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses

Interfacial plasticity governs strain delocalization in metallic nanoglasses

Mechanical Properties of Glassy Nanopillars: A Comparative, Computational Study of Size Effects in Nanoglasses and Homogeneous Bulk Glasses

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