Influence of cyclic loading on the onset of failure in a Zr-based bulk metallic glass

Louzguine-Luzgin, Dmitri V.; Louzguina-Luzgina, Larissa V.; Ketov, S.V.; Zadorozhnyy, V.Yu.; Greer, A.L.

doi:10.1007/s10853-014-8276-2

Cited by 13 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The oscillating-load mode used for the tests in the present work is significantly more destructive than sliding wear. This is consistent with earlier work showing that low-cycle fatigue severely reduces the flow stress of a BMG sample compared to continuous loading 56 : only 10‒15 loading cycles led to mechanical failure. The strong effect of cyclic loading was attributed to the inhomogeneous distribution of internal stresses and the amplitude of elastic-strain-driven reverse shear on active shear bands upon unloading 57 .…”

Section: Discussionsupporting

confidence: 93%

Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

Louzguine‐Luzgin

Trifonov

Ivanov

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

Shear-induced segregation, by particle size, is known in the flow of colloids and granular media, but is unexpected at the atomic level in the deformation of solid materials, especially at room temperature. In nanoscale wear tests of an Fe-based bulk metallic glass at room temperature, without significant surface heating, we find that intense shear localization under a scanned indenter tip can induce strong segregation of a dilute large-atom solute (Y) to planar regions that then crystallize as a Y-rich solid solution. There is stiffening of the material, and the underlying chemical and structural effects are characterized by transmission electron microscopy. The key influence of the soft Fe–Y interatomic interaction is investigated by ab-initio calculation. The driving force for the induced segregation, and its mechanisms, are considered by comparison with effects in other sheared media.

show abstract

Section: Discussionsupporting

confidence: 93%

Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

Louzguine‐Luzgin

Trifonov

Ivanov

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…On solidification of the melt, they are typically formed either in the shape of 10 1 -10 2 lm thick ribbons by rapid solidification onto a rotating Cu wheel [2] or in bulk shape of 10 0 -10 2 mm thick rods by Cu mold casting [6]. The cooling rate of the melt spinning technique attains 1 MK/s.…”

Section: Introductionmentioning

confidence: 99%

Role of different factors in the glass-forming ability of binary alloys

et al. 2014

Self Cite

View full text Add to dashboard Cite

International audienceIn the present work, we discuss the glass-forming ability of various binary alloys in which the glassy phase was not formed even by melt spinning technique with high cooling rate of the melt up to 1 MK/s (some consisted of partly glassy phase), though by commonly accepted guidelines, these alloys could be as good glass-formers as many other binary glasses. The alloys studied belong to binary systems with multiple eutectics; the constituent elements have a negative enthalpy of mixing, and a significant variability of atomic size differences is observed from system to system. The results indicate the necessity of taking into account simultaneously various factors influencing the glass-forming ability including melt fragility

show abstract

“…(a)). This effect may also be responsible for rapid decrease in the flow stress upon low cycle fatigue tests . This result was interpreted using the notion of microplastic events occurring beneath the contact at sub‐yield loads and, at least in the case of cyclic loading, suggests that these microplastic events favor a stiffer glassy structure with higher density .…”

Section: Discussionmentioning

confidence: 80%

Room‐temperature dynamic quasi‐elastic mechanical behavior of a Zr–Cu–Fe–Al bulk metallic glass

Zadorozhnyy

Сhuryumov

et al. 2015

Physica Status Solidi (a)

Self Cite

View full text Add to dashboard Cite

The paper represents storage modulus and internal friction modulation upon cyclic loading of Zr61Cu27Fe2Al10 bulk metallic glassy samples within quasi‐reversible deformation regime. The structure of the samples was studied by X‐ray diffraction and transmission electron microscopy including high‐resolution imaging and selected‐area electron diffraction. It is found that kinetically frozen anelastic deformation accumulates on mechanical cycling at room temperature and causes an increase in the storage modulus and even nanocrystallization of a metallic glassy phase after a certain number of cycles. The study has shown that even a minor cyclic deformation in an elastic region can lead to the changes the atomic structure and in turn affect the elastic modulus.

show abstract

Influence of cyclic loading on the onset of failure in a Zr-based bulk metallic glass

Cited by 13 publications

References 38 publications

Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

Role of different factors in the glass-forming ability of binary alloys

Room‐temperature dynamic quasi‐elastic mechanical behavior of a Zr–Cu–Fe–Al bulk metallic glass

Contact Info

Product

Resources

About