Tensile fracture characteristics and deformation behavior of a Zr-based bulk metallic glass at high temperatures

Wang, Gang; Shen, Jin-Hui; Sun, Jian; Liu, Xiongjun; Stachurski, Zbigniew; Zhou, Bo

doi:10.1016/j.intermet.2004.10.011

Cited by 39 publications

(36 citation statements)

References 24 publications

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“…Fractograph of BMGs' samples under uniaxial tensile loading have been characterized in previous studies [13][14][15]. The veinlike pattern formed with ridges and flat, smooth surface in the BMG samples under uniaxial tensile loading were observed [11,22].…”

Section: Analysis and Discussionmentioning

confidence: 93%

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Spallation behaviour of a Zr-bulk metallic glass

Zhong

Huang

Shen

et al. 2012

EPJ Web of Conferences

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Abstract. Plate impact experiments have been conducted on a Zr-based bulk metal glass (BMG) using a single stage light gas gun. To understand the spallation process of the material, samples were subjected to dynamic tensile loadings of the same amplitude but different durations. Fractographs of spallation surface and fracture features were characterized and the fracture mechanism of different regions of the spallation surface was discussed. Morphology of the spallation surface in the Zr-BMG exhibited a typical equiaxial cellular pattern and porous microstructure. These experiments revealed that, subjected to hydrotensile stresses, the microdamage of the spallation occurred in the Zr-BMG is microvoids; the spallation in the Zr-BMG is resulted from nucleation, growth and coalescence of microvoids; and the time needed for these microvoids nucleation is less than 100 ns with a stress amplitude of 3.18 GPa.

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Section: Analysis and Discussionmentioning

confidence: 93%

“…These behaviours are being investigated with a considerable interest. A concept of "free volume" [10][11][12], has currently been applied to understand BMGs' fracture and failure behaviours under quasistatic and dynamic compressive, as well as shear loading [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Spallation behaviour of a Zr-bulk metallic glass

Zhong

Huang

Shen

et al. 2012

EPJ Web of Conferences

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“…To elaborate much further, unlike conventional crystalline alloys where plastic deformation is explained by the theory of dislocation, plastic deformation in amorphous alloys occurs by shear localization at low temperature (Spaepen 2006). Under mechanical loading conditions and at temperatures well below the glass transition temperature, the stress is insensitive to strain rate and the flow is characterized by a plastic and inhomogeneous behavior (Wang et al 2005a). The nonelastic deformation is confined to narrow bands called "shear bands" (inhomogeneous flow), and fracture eventually occurs due to excessive localized deformation of such dominant shear bands (Zhang et al 2003).…”

Section: Structural Thermal and Mechanical Propertiesmentioning

confidence: 99%

Amorphous Alloys/Bulk Metallic Glasses (BMG)

Jayalakshmi¹,

Gupta

2015

SpringerBriefs in Materials

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The background of metallic amorphous materials/bulk metallic glasses (BMGs) is briefly introduced. The various methods of processing that give rise to amorphous phase formation are explained. The properties of amorphous/BMG systems based on Zr, Ni, Ti, etc., are presented in terms of their structure, thermal, and mechanical properties. The major limitations that restrict the use of these novel materials are mentioned.

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“…Zhang [10] et al found the existence of a large number of radial dimples in the tensile fracture surface in Zr-based metallic glasses at room temperature. Wang [11] et al…”

Section: Introductionmentioning

confidence: 99%

“…Zhang [10] et al found the existence of a large number of radial dimples in the tensile fracture surface in Zr-based metallic glasses at room temperature. Wang [11] et alfound that the tensile fracture morphology of Zr-based amorphous alloy presents a typical vein pattern. A lot of efforts have also been made to enhance global plasticity or ductility of metallic glasses at room temperature.…”

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confidence: 99%

Deformation and fracture of a Zr-Al-Cu metallic glass ribbon under tension near glass transition temperature

Gao

Dong

et al. 2018

China Foundry

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A morphous alloys have excellent mechanical properties compared with traditional crystalline alloys, such as high strength, superplasticity in the supercooled liquid region, good corrosion resistance and large elastic limit [1] . An amorphous alloy is a kind of metallic material with only a short-range order on the atomic scale. Because its microstructure is quite similar to that of glass and it forms from rapid cooling of metals, it is also called metallic glass [2][3][4][5] . Lack of typical defects for polycrystalline alloys, such as grain boundaries and dislocations, metallic glasses attract a lot of research interests on fabrication methods, properties and applications [6][7][8] of tension, even compression [9] . The limited plastic deformation under tension or compression is normally localized in a single primary shear band of about 10 nm thick, rendering no observable global plastic deformation. The localized shear banding introduces a brittle manner of rupture, causing catastrophic failure under loading higher than the strength as in ceramic materials. Thus, the practical application as structural materials is seriously restricted The mechanical behavior and fracture of bulk metallic glasses at room temperature were widely investigated and in-depth fracture analysis was carried out. Zhang [10] et al. found the existence of a large number of radial dimples in the tensile fracture surface in Zr-based metallic glasses at room temperature. Wang [11] et al.found that the tensile fracture morphology of Zr-based amorphous alloy presents a typical vein pattern. A lot of efforts have also been made to enhance global plasticity or ductility of metallic glasses at room temperature. Zhang et al. [12] introduced compression surface stresses to obstruct single primary shear band propagation and shear localization, the remarkable improvement of ductility was obtained in bulk metallic glasses. It is still difficult to achieve tensile ductility of monolithic metallic glasses. Guo et al. [13] employed in situ transmission electron microscope to determine the deformation nature of the small-sized metallic glass under tension. For the 100 nm thick sample, great tensile *Hong-wang YangMale, born in 1974, PhD, associate professor. His research interest mainly focuses on the development of metallic glasses with high glass forming ability, high temperature mechanical behavior and crystallization mechanisms of amorphous alloys.

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Tensile fracture characteristics and deformation behavior of a Zr-based bulk metallic glass at high temperatures

Cited by 39 publications

References 24 publications

Spallation behaviour of a Zr-bulk metallic glass

Spallation behaviour of a Zr-bulk metallic glass

Amorphous Alloys/Bulk Metallic Glasses (BMG)

Deformation and fracture of a Zr-Al-Cu metallic glass ribbon under tension near glass transition temperature

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