Shear Banding in Metallic Glasses: Major Weakness or Potential Advantage?

Axinte, Eugen; Wang, Yan; Tăbăcaru, Lucian; Radwan, Neyara

doi:10.2174/1874464809666160407212236

Cited by 5 publications

(6 citation statements)

References 70 publications

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“…6a. It was found that the hardness on the shocked surface center is greater than 9 the hardness on the as-cast specimen, exhibiting hardening effect. Similar hardening effect was reported by Wei et al [24].…”

Section: Hardnessmentioning

confidence: 91%

“…It has been proved that the promotion of free volume could decrease hardness, causing a softening effect [9][10][11]; while the residual compress stress could increase hardness by inhibiting the propagation of shear bands, causing a hardening effect [13,14]. The softening effect was found on the longitudinal section of the LSPed specimens (Fig.…”

Section: Influence Of Free Volume and Residual Stress On Hardnessmentioning

confidence: 99%

“…According to the models proposed by Spaepen and Argon [7,8], amounts of free volume were found to induced in shear bands during plastic deformation, and the free volume increase resulted in a decrease in hardness [9][10][11][12]. The residual compressive stress, however, could inhibit the propagation of shear bands and promote a hardening effect on BMGs [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Evolution of residual stress, free volume, and hardness in the laser shock peened Ti-based metallic glass

Wang

Nie

et al. 2016

Materials & Design

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Laser shock peening (LSP) with different cycles was performed on the Ti-based bulk metallic glasses (BMGs). The internal residual stress of the LSPed specimens was measured by high-energy X-ray diffraction (HEXRD) and the residual stress on the shocked surface was measured by scanning electron microscope/focused ion beam (SEM/FIB) instrument. The internal residual stress in the LSP impact direction (about -170 MPa) is much lower than that perpendicular to the impact direction (about -350 MPa), exhibiting anisotropy. The depth of the compressive stress zone increases from 400 μm to 500 μm with increasing LSP cycles. The highest residual stress on the shocked surface is about -750 MPa. LSP caused the free volume to increase and the maximum increase appeared after the first LSP process. Compared with the hardness (567±7 HV) of the as-cast BMG, the hardness (590±9 HV) on the shocked surface shows a hardening effect due to the hardening mechanism of compressive residual © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 stress; and the hardness (420±9 HV) on the longitudinal section shows a softening effect due to the softening mechanism of free volume.

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Section: Hardnessmentioning

confidence: 91%

Section: Influence Of Free Volume and Residual Stress On Hardnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evolution of residual stress, free volume, and hardness in the laser shock peened Ti-based metallic glass

Wang

Nie

et al. 2016

Materials & Design

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“…The significant difference in the mechanical properties is thought to be a reflection of the difference in the deformation and fracture mechanisms between MGs and crystalline alloys. Plastic deformation in metallic glasses is generally associated with inhomogeneous flow in highly localized shear bands [5][6][7][8][9][10]. Metallic glasses cannot have the crystallographic defined slip-systems of polycrystalline metals.…”

Section: Mechanical Properties Of Metallic Glassesmentioning

confidence: 99%

“…Since hardness is understood to be a measure of flow stress, it correlates linearly with the material yield strength. The Vickers hardness plotted from different materials (1.d) shows that the amorphous metals demonstrate an advantage over crystalline metals in terms of hardness [10].…”

Section: Mechanical Properties Of Metallic Glassesmentioning

confidence: 99%

An overview on the conventional and nonconventional methods for manufacturing the metallic glasses

et al. 2017

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Abstract. Metallic glasses (MGs), first discovered in 1959 at Caltech are currently among the most studied metallic materials. MGs called also glassy metals, amorphous metals, liquid metals, are considered to be among the materials of the future. The "classic" methods for industrialization of MGs are : end-casting in copper molds and protected environment, die forging , atomization for obtaining MG powder ,selective laser melting , imprinting in molds, thermoplastic shaping in the super-cooled temperature region. These methods are suitable for producing high value-added precision components but the problems still exists: expensive tools, limited lifetime of tools and the occurring of crystallization. Actually methods (thermoplastic shaping, casting and die forging) are limited by the low flexibility of production and by higher costs of tools and accessories. More suitable methods are greatly desired to machine MGs for their wider applications.

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Impact of hydrogen microalloying on the mechanical behavior of Zr-bearing metallic glasses: A molecular dynamics study

Wang

Luo

Dong

et al. 2020

Journal of Materials Science & Technology

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Shear Banding in Metallic Glasses: Major Weakness or Potential Advantage?

Cited by 5 publications

References 70 publications

Evolution of residual stress, free volume, and hardness in the laser shock peened Ti-based metallic glass

Evolution of residual stress, free volume, and hardness in the laser shock peened Ti-based metallic glass

An overview on the conventional and nonconventional methods for manufacturing the metallic glasses

Impact of hydrogen microalloying on the mechanical behavior of Zr-bearing metallic glasses: A molecular dynamics study

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