The correlation between the pressure sensitivity and the fragility/glass transition temperature in bulk metallic glasses

Liu, L.F.; Cai, Zhihai; Li, H.Q.; Guo, Shaojun; Zhang, G.Y.

doi:10.1016/j.jnoncrysol.2011.03.024

Cited by 3 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, all of the yield strengths are summarized from literatures, which were carried out under uniaxial compressions at quasistatic strain rates. Under such conditions, the yield strength is an inherent material property and should be almost constant for a given metallic glass [29,30]. The shear moduli in both the literatures and present work were measured by ultrasonic method, which has an accuracy better than 5% [31][32][33].…”

Section: Methodsmentioning

confidence: 85%

The correlation between weakest configurations and yield strength of Zr-based metallic glasses

Jiang

Ding

et al. 2017

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

A direct relationship between the yield strength and the atomic ratio of solvent (Zr) atoms in the Zr-Cu-Al-Ni metallic glasses system is firstly uncovered. It is found that either shear modulus or yield strength decreases almost nearly with the increase in atomic ratio of Zr. The origin of this relationship is ascribed to the preferential straining of the weakest configurations, which consist of the solvent-solvent bonds and the free volume concentrated in them. It is suggested that a higher atomic ratio of Zr corresponds to a larger amount of weakest configurations, which will facilitate the activation and the accumulation of the shear transformations and finally results in the lower yield strength. This finding may provide an effective strategy for designing high-strength metallic glasses by modifying the chemical composition.

show abstract

Section: Methodsmentioning

confidence: 85%

The correlation between weakest configurations and yield strength of Zr-based metallic glasses

Jiang

Ding

et al. 2017

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

show abstract

“…Numerous correlations of the fragility with different physical properties of MGs are reported in the literature. The fragility was found to correlate with the critical cooling rate, which determines the glass-forming ability [7,13,14], Poisson's ratio [15][16][17][18], shear modulus [19], low-temperature Boson heat capacity peak and vibrational properties [20,21], excess entropy [22], heating rate dependence of the calorimetric glass transition [23], T g -scaled slope of the differential scanning calorimetry (DSC) scans in the glass transition region [24], and even with the flow stress, plasticity, and hardness of metallic glasses [18,[25][26][27][28]. Thus, the fragility constitutes a major physical parameter of supercooled liquids and glasses, which is embedded in their properties.…”

Section: Introductionmentioning

confidence: 99%

Relation of the fragility and heat capacity jump in the supercooled liquid region with the shear modulus relaxation in metallic glasses

Макаров

Qiao

Кобелев

et al. 2021

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Fragility constitutes a major parameter of supercooled liquids. The phenomenological definition of this quantity is related to the rate of a change of the shear viscosity η at the glass transition temperature. Although a large number of correlations of the fragility with different properties of metallic glasses were reported, an adequate understanding of its physical nature is still lacking. Attempting to uncover this nature, we performed the calculation of the fragility within the framework of the interstitialcy theory (IT) combined with the elastic shoving model. We derived an analytical expression for the fragility, which shows its relation with the high-frequency shear modulus G in the supercooled liquid state. To verify this result, specially designed measurements of η and G were performed on seven Zr-, Cu- and Pd-based metallic glasses. It was found that the fragility calculated from shear modulus relaxation data is in excellent agreement with the fragility derived directly from shear viscosity measurements. We also calculated the heat capacity jump ΔC sql at the glass transition and showed that it is related to the fragility and, consequently, to shear modulus relaxation. The ΔC sql-value thus derived is in a good agreement with experimental data. It is concluded that the fragility and heat capacity jump in the supercooled liquid state can be determined by the evolution of the system of interstitial-type defects frozen-in from the melt upon glass production, as suggested by the IT. This connection is mediated by the high-frequency shear modulus.

show abstract

Effect of hydrostatic pressure on shear banding behaviors in bulk metallic glasses

Liu¹,

Yang²,

Hu³

et al. 2013

Materials Letters

View full text Add to dashboard Cite

The correlation between the pressure sensitivity and the fragility/glass transition temperature in bulk metallic glasses

Cited by 3 publications

References 46 publications

The correlation between weakest configurations and yield strength of Zr-based metallic glasses

The correlation between weakest configurations and yield strength of Zr-based metallic glasses

Relation of the fragility and heat capacity jump in the supercooled liquid region with the shear modulus relaxation in metallic glasses

Effect of hydrostatic pressure on shear banding behaviors in bulk metallic glasses

Contact Info

Product

Resources

About