Stress relaxation of bulk and ribbon glassy PdCuNiP

Bobrov, O. P.; Csach, К.; Khonik, V. A.; Kitagawa, Kazuo; Laptev, S.N.; Yazvitsky, M.Yu.

doi:10.1016/j.scriptamat.2005.09.056

Cited by 13 publications

(8 citation statements)

References 11 publications

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“…First, intense relaxation of applied (i.e. external) stresses in the same glass upon linear heating is known to take place in about the same temperature range, 350 < T < 460 K, independent on the initial state (bulk/ribbon) of samples [22]. Second, degradation of deformation-induced internal friction peak in this glass also starts upon annealing in this temperature range [18].…”

Section: Discussionmentioning

confidence: 93%

The kinetics of structural relaxation of bulk and ribbon glassy Pd40Cu30N10P20 monitored by resistance and density measurements

Khonik¹,

Kaverin²,

Кобелев³

et al. 2008

Journal of Non-Crystalline Solids

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Section: Discussionmentioning

confidence: 93%

The kinetics of structural relaxation of bulk and ribbon glassy Pd40Cu30N10P20 monitored by resistance and density measurements

Khonik¹,

Kaverin²,

Кобелев³

et al. 2008

Journal of Non-Crystalline Solids

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“…The independence of aforementioned viscoelastic and anelastic properties on the production quenching rate, therefore, could question the role of the free volume as a key parameter controlling the kinetics of structural relaxation and related viscoelastic phenomena. 17,18 ͑iv͒ Five equal vertical bars in Fig. 1 show that the ln ͑T͒ dependencies taken at different heating rates can be superposed just by a parallel shift along the ordinate axis.…”

Section: Methodsmentioning

confidence: 94%

Relationship between the shear viscosity and heating rate of metallic glasses belowTg

et al. 2006

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It has been shown that the shear viscosity of bulk and ribbon glassy Pd 40 Cu 30 Ni 10 P 20 at temperatures T Ͻ T g ͑T g is the glass transition temperature͒ follows a simple relationship, ln ͑T͒ = B͑T͒ −ln Ṫ , where Ṫ is the heating rate and B depends only on temperature. This means, in particular, that ln ͑T͒ dependencies measured at different heating rates can be superposed by a simple vertical shift and the derivative ‫ץ͉‬ ln / ‫ץ‬ ln Ṫ ͉ T=const = −1. Such a behavior is indeed found for glassy Pd 40 Cu 30 Ni 10 P 20 . The experimental viscosity data derived earlier on other metallic glasses follow the same relationship. It is argued that this relationship originates from stress-oriented irreversible structural relaxation with distributed activation energies.

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“…The stress relaxation of the metallic glasses was frequently studied by tensile or compressive tests [17][18][19]. To further understand the mechanical properties of the La 60 Ni 15 Al 25 BMG, we also characterized the stress relaxation by the DMA.…”

Section: Stress Relaxation In La-based Metallic Glassmentioning

confidence: 99%

“…Lu et al proposed a parameter n to describe the structural heterogeneity of metallic glasses based on the stress relaxation [16], which provides a new perspective to understand the relation between the intrinsic structure and dynamic heterogeneity of the metallic glasses. From the linear heating and isothermal tensile stress relaxation experiments of the Pd 40 Cu 30 Ni 10 P 20 metallic glass, Bobrov et al suggested that stress relaxation is caused by irreversible structural relaxation orientation induced by the external stress [17]. On the other hand, stress relaxation behavior of metallic glasses has been observed at the room temperature.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of stress relaxation kinetics of La 60 Ni 15 Al 25 bulk metallic glass

et al. 2015

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a b s t r a c tThe b relaxation typically plays an important role in the plastic deformation of glassy materials. Compared with amorphous polymers, most of the metallic glasses do not show evident b relaxation based on mechanical spectroscopy. However, La 60 Ni 15 Al 25 bulk metallic glass (BMG) exhibits a prominent b relaxation process, which could be an ideal model alloy to investigate the correlation between the b relaxation and mechanical behavior of metallic glasses. In this work, compressive properties and stress relaxation at high temperature (below glass transition temperature T g ) were studied. Stress relaxation of La 60 Ni 15 Al 25 BMG was measured by uniaxial compressive tests and mechanical spectroscopy around both a and b relaxation temperature domain. At higher temperatures and sufficiently low strain rate, the flow behavior of the La 60 Ni 15 Al 25 BMG could be simulated by a master curve, showing that the behavior is independent of temperature, especially on the proximity of the b relaxation process. Because the existence of the b relaxation, a high value of the activation volume for the plastic deformation could be ascribed to the existence of a specific atomic arrangement in the La 60 Ni 15 Al 25 BMG. It is found that compressive stress relaxation kinetics parameter remains temperature independent below T g .

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Stress relaxation of bulk and ribbon glassy PdCuNiP

Cited by 13 publications

References 11 publications

The kinetics of structural relaxation of bulk and ribbon glassy Pd40Cu30N10P20 monitored by resistance and density measurements

The kinetics of structural relaxation of bulk and ribbon glassy Pd40Cu30N10P20 monitored by resistance and density measurements

Relationship between the shear viscosity and heating rate of metallic glasses belowTg

Characteristics of stress relaxation kinetics of La 60 Ni 15 Al 25 bulk metallic glass

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