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Showing 1 to 20 of 49 for “"metallic glasses"”.
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Microplasticity in metallic glasses
Metallic Glasses (MGs) are amorphous metallic alloys with exceptional mechanical and physical properties. Like all good things, this class of materials comes with its own problems, in this case (i) a lack of ductility, (ii) degradation in properties over time due to aging, and (iii) abrupt and …
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Thermomechanical Processing of Metallic Glasses
Depending on its thermal and kinetic history, a metallic glass (MG) of a given composition can show a wide range of energetic states. One central parameter determining the initial state of a glass is the cooling rate used to form it upon quenching from the melt. A faster cooling rate will give rise …
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Shear-band structure in metallic glasses
Metallic glasses (MGs) are amorphous alloys that possess exceptional mechanical properties compared to their crystalline counterparts. The fundamental problem that currently prevents the use of MGs as reliable structural materials is the lack of understanding of how their structure evolves as a …
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Bulk Metallic Glasses based on Precious Metals
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Aspects of the mechanics of metallic glasses
Metallic glasses are amorphous materials that possess unique mechanical properties, such as high tensile strengths and good fracture toughnesses. Also, since they are amorphous, metallic glasses exhibit a glass transition, and at temperatures above this glass transition, they soften dramatically …
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Phonon thermal transport in metallic glasses below 100 K
… the phonon thermal conductivity of a variety of metallic glasses. In each case, the temperature dependence and magnitude of the phonon thermal conductivity of the glassy metal was very similar to that characteristic of nonmetallic glasses. We also performed variation of sound velocity …
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Effect of atomic size on diffusion in metallic glasses
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Electrochemical Hydrogen Absorption by Zr-Cu-Al-Ni Metallic Glasses
Effect of electrochemical absorption of hydrogen has been studied on the Zr-based amorphous alloys. The influence of hydrogen absorption on the stability of the amorphous phase and its crystallisation was investigated. Additionally, the cathodic hydrogen reaction mechanism on the surface of the …
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Nanomechanical studies of metallic glasses at ambient and elevated temperatures
Bulk metallic glasses, though attractive for use in structural applications for their high strength and elastic limit, display several unacceptable features upon deformation, including quasi-brittle failure along shear bands, extremely limited tensile ductility, and propensity for fatigue under …
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Evolution of the structure and properties of thermomechanically-processed metallic glasses
Metallic glasses (MGs) can assume a remarkably wide range of structures and properties depending on their thermal and processing histories. Increasing the MGs’ enthalpies through thermomechanical processing, a process typically termed rejuvenation, can provide large improvements in mechanical …
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Deformation Localization in Constrained Layers of Metallic Glasses: A Parametric Modeling Analysis
… known as shear banding is a prominent feature in metallic glasses. In this study we perform parametric three-dimensional finite ele- ment analyses, using primarily a thin layer of metallic glass on top of a cylindrical base, to study how physical constraint can affect this localized form of …
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A Methodology For Instrumented Indentation Studies Of Deformation In Bulk Metallic Glasses
Bulk Metallic Glasses (BMGs), also known as amorphous metals, are of considerable scientific and commercial interest due to their random or chaotic structure. Given their potential use as engineering materials, there is a concomitant need to establish their mechanical properties. However, BMGs are …
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Influence of Structural Relaxation Upon the Low Temperature Properties of Metallic Glasses
… investigated the low temperature properties of metallic glasses. We find that below 1K, the thermal conductivity of metallic glasses (Fe(,40)Ni(,40)P(,14)B(,6), Pd(,77.5)Si(,16.5)Cu(,6) and Zr(,3)Rh) is similar to that of the large class of amorphous materials previously investigated, including …
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Influence of structural relaxation upon the low temperature proerties of metallic glasses
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-08T16:44:23Z No. of bitstreams: 1 1983_cotts.pdf: 3879140 bytes, checksum: 988c469465bd83fbdeae4baadb12eef6 (MD5)
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Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism
… PhD study, two novel, multifunctional Fe-based metallic glasses (MGs) with the nominal components of Fe78Si9B13 (also known as 1K101) and Fe73.5Si13.5B9Cu1Nb3 (1K107) are manufactured by melt-spinning method to investigate the catalytic performance. The two produced glassy ribbons exhibit …
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Casting and characterization of Fe-(Cr,Mo,Ga)-(P,C,B) soft magnetic bulk metallic glasses
The ferromagnetic bulk metallic glasses (BMGs) started to be investigated only in the last 10 years.They are difficult to cast, but their properties are uniques. The work deals with casting, mechanical and soft magnetic properties of new Fe-based BMGs. Such alloys can be cast directly in samples …
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