Enhanced plasticity by introducing icosahedral medium-range order in ZrCuNiAl metallic glass

Pan, Jie; Chan, Kang Cheung; Chen, Qianjie; Liu, L.

doi:10.1016/j.intermet.2012.01.006

Cited by 26 publications

(4 citation statements)

References 47 publications

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“…5. By decreasing the testing temperature, the critical size of the initiation centres of chevron-like failure decreases [14,15]. The smaller imperfections of amorphous structure become active and modify the initiation of the failure at the stress below the yield stress of the material.…”

Section: Resultsmentioning

confidence: 99%

FRACTURE OF Zr56Ni24Al20 AMORPHOUS ALLOYS AT ULTRALOW TEMPERATURES

Csach

Miškuf²,

Juríková³

et al. 2013

Acta Metall. Slovaca Conf.

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We observed the failure surface of Zr 56 Ni 24 Al 20 amorphous ribbon samples tested in uniaxial tension in low temperature interval up to 0.5 K. Shear ductile failure manifestations were obviously present. Metallic glasses are usually deformed by the shear fracture with obvious shear bands and show little plasticity before the final fracture. At low temperatures the chevron pattern morphology is rarely present too. The occurence of chevrons is connected with decreasing of the fracture stress. Analysis of fracture morphology revealed that dominantly chevron morphology is present and that the failure of this amorphous material initiates at low temperatures at geometrical imperfections of ribbons. These failures are often presented as a premature failure.

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Section: Resultsmentioning

confidence: 99%

FRACTURE OF Zr56Ni24Al20 AMORPHOUS ALLOYS AT ULTRALOW TEMPERATURES

Csach

Miškuf²,

Juríková³

et al. 2013

Acta Metall. Slovaca Conf.

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“…[16][17][18] The icosahedral local orders produce structural inhomogeneity in amorphous alloys and are conducive to improving the plasticity of such amorphous alloys. [19][20][21][22][23][24][25] Such MGs contain-ing icosahedral local orders generally show two-step crystallization behaviors, in which the primary crystalline phase is quasi-crystalline phase. [26][27][28] Inspired by this, if bulk amorphous alloys can be prepared by modulating structures of quasi-crystalline systems through doping, it is possible that local orders of MGs are dominated by icosahedral local orders.…”

Section: Introductionmentioning

confidence: 99%

A group of ductile metallic glasses prepared by modifying local structure of icosahedral quasicrystals

et al. 2023

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Inspired by researches into the association between icosahedral local orders and the plasticity of metallic glasses (MGs), beryllium (Be) was added to the icosahedral quasi-crystal forming alloy Zr40Ti40Ni20. In this way, bulk metallic glasses (BMGs) with favorable compressive plasticity were fabricated. Therein, the icosahedral quasi-crystalline phase is the main competing phase of amorphous phases and icosahedral local orders are one of the main local atomic motifs in amorphous phases. The alloys of (Zr40Ti40Ni20)76Be24 and (Zr40Ti40Ni20)72Be28 with their greater plastic strain capacity show similar characteristics to highly-plastic amorphous systems: the serrated flow of compression curves always follows a near-exponential distribution; the primary and secondary shear bands intersect each other, bifurcate, and bend; typical vein patterns are densely distributed on the fracture surfaces. The relaxation enthalpy of four MGs is linearly correlated with the plastic strain, that is, the greater the relaxation enthalpy, the larger the plastic strain.

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“…However, due to the existence of grains inside the ordinary crystalline materials, the application of microdevices has been restricted by the grain size, and ordinary crystalline materials have not been able to meet the needs of miniaturized parts. Zr-based bulk metallic glasses (BMGs) do not display the graininduced scale effect and have excellent properties such as high strength, high hardness, low Young's modulus and high abrasion resistance [1][2][3][4][5][6]. They also have good thermoplastic properties in the supercooled liquid region [7,8], making them ideal materials for MEMS applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of rare earth Y on properties of Zr-based bulk metallic glasses

Li¹,

Li²,

Wang³

et al. 2021

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In this work, ø 3 mm × 70 mm (Zr63.36Cu14.52Ni10.12Al12)1−xYx (x = 0, 0.2, 0.5, 0.6, 1, 1.2, 1.5, 2, and 3 at.%) rod-shaped bulk metallic glasses (BMGs) were fabricated using the copper mold suction casting method and the effects of the addition of Y on the properties of Zr-based BMGs were studied. The results indicate that the properties of Zr-based BMGs can be enormously improved by the addition of an appropriate amount of the rare earth Y element. The values of the supercooled liquid region width (ΔTx), glass-forming ability (GFA) parameter (γ), thermoplastic forming (TPF) ability parameter (S), and plastic strain (εp) for the alloy with x = 0.6 reach 115 K, 0.390, 0.228, and 16.5 %, respectively, and are much higher than those of the alloy with x = 0, indicating that the alloy with x = 0.6 exhibits excellent thermal stability, glass-forming ability, thermoplastic forming ability, and compressive plasticity. It was also found that the alloy with x = 1.5 has the minimum corrosion current (icorr = 1.12 × 10 −9 A cm −2 ), showing excellent corrosion resistance. Overall, the alloy with the Y content of x = 0.6 demonstrates excellent thermal stability, GFA, TPF ability, mechanical properties, and corrosion resistance, thus displaying improved comprehensive properties.

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Enhanced plasticity by introducing icosahedral medium-range order in ZrCuNiAl metallic glass

Cited by 26 publications

References 47 publications

FRACTURE OF Zr56Ni24Al20 AMORPHOUS ALLOYS AT ULTRALOW TEMPERATURES

FRACTURE OF Zr56Ni24Al20 AMORPHOUS ALLOYS AT ULTRALOW TEMPERATURES

A group of ductile metallic glasses prepared by modifying local structure of icosahedral quasicrystals

Effect of rare earth Y on properties of Zr-based bulk metallic glasses

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