Tensile properties of ZrCu-based bulk metallic glasses at ambient and cryogenic temperatures

Huo, Lishan; Bai, H. Y.; Xi, X.K.; Ding, Dawei; Zhao, D.Q.; Wang, W.H.; Huang, Rong; Li, L.F.

doi:10.1016/j.jnoncrysol.2011.04.017

Cited by 20 publications

(21 citation statements)

References 36 publications

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“…In contrast, some recent results have indicated that the tensile plastic deformation of BMGs occurs at cryogenic temperature on the basis of experiments performed using Zr CuAl BMG, 7) ZrCu based BMG 8) and ZrNiCuAl BMG. 9) These results suggest that the tensile plastic deformation behavior of BMGs depends on the strain rate and temperature.…”

Section: Introductionmentioning

confidence: 87%

“…These features indicate the lower fluidity and higher viscosity of the supercooled liquid within the major shear band in the first area. 8) From these experimental results, the tensile plastic deformation process of the BMG at a temperature of 133 K and strain rate of 10 ¹1 s ¹1 is speculated to be as follows. (1) Two major shear bands, which penetrate the specimen, are generated in the specimen, as shown in Fig.…”

Section: ¹1mentioning

confidence: 98%

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Tensile Plastic Deformation Behavior of Zr70Ni16Cu6Al8 Bulk Metallic Glass at Cryogenic Temperature

2012

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A hypoeutectic ZrNiCuAl bulk metallic glass (BMG) shows a clear tensile plastic deformation under a high strain rate condition at room temperature. In this study, the effect of cryogenic temperature and strain rate on the tensile plastic deformation behavior of the hypoeutectic ZrNiCuAl BMG was investigated. Tensile tests were performed for the hypoeutectic ZrNiCuAl BMG specimen with gauge part dimensions of 2.3 mm in length and 0.8 mm in diameter at cryogenic temperature (133 K) under different strain rate conditions (10 ¹4 and 10 ¹1 s ¹1). As the results, the tensile plastic deformation occurs under both strain rate conditions. Especially, in low strain rate condition (10 ¹4 s ¹1), the amount of plastic deformation is clearly larger than that under the high strain rate condition (10 ¹1 s ¹1). Furthermore, it was found that there is no positive correlation between the amount of tensile plastic deformation and the number of shear band. In addition, it was inferred that the tensile plastic deformation of the hypoeutectic ZrNiCuAl BMG at cryogenic temperature was induced by specimen sliding along only one major shear band.

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Section: Introductionmentioning

confidence: 87%

Section: ¹1mentioning

confidence: 98%

Tensile Plastic Deformation Behavior of Zr70Ni16Cu6Al8 Bulk Metallic Glass at Cryogenic Temperature

2012

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“…Similar to crystalline alloys, BMGs usually exhibit higher strength with the decrease of the ambient temperature [1][2][3][4][5][6][7][8][9][10]. Its underlying mechanism has been discussed in terms of shear transformation zones (STZs) [1,3,5,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the strengthened materials at low temperature usually behave more brittle. However, very interestingly, it is reported that BMGs at cryogenic temperature show enhanced plasticity in compression [1][2][3][4][5][6][7][8], even in tension [9,10]. Such plasticity improvement was attributed to multiple-nucleation of shear bands at low temperature [1,5,7].…”

Section: Introductionmentioning

confidence: 99%

Ambient temperature embrittlement of a Zr-based bulk metallic glass

Jiang¹,

Wang²,

Jiang³

et al. 2012

Materials Science and Engineering: A

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a b s t r a c tThree-point bending experiments were performed on Zr 52.5 Cu 17.9 Ni 14.6 Al 10 Ti 5 (Vit105) bulk metallic glass (BMGs) over a wide range of ambient temperatures varying from the liquid nitrogen temperature (77 K) to about boiling water temperature (370 K). The results demonstrated that the flexural strength of the Zrbased BMG monotonously increased with decreasing of test temperature, whereas plastic deformation ability displayed a maximum at a moderate temperature (about room temperature). That is, the plastic deformation ability was deteriorated by either higher or lower temperature than room temperature through affecting shear band nucleation and propagation within materials respectively.

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“…Bulk metallic glasses (BMGs) are expected not to undergo ductile-to-brittle transition (DBT) which was exhibited by most body-centered cubic (bcc) metal alloys at cryogenic temperatures because they lack dislocation structure and therefore have no dislocation-based deformation. Preliminary studies demonstrated that BMGs at cryogenic temperature exhibit an enhanced plasticity with a higher shear-band density in compression test, [1][2][3][4][5] but do not present clearly the plasticity as well ambient temperature in tension test with several shear bands even only one, 6,7 and flow plasticity deteriorated compared with room temperature in threepoint bending tests. 8 Raghavan et al 9 studied Charpy impact toughness of a Zr-based BMG at various temperatures, and the results showed that toughness at cryogenic temperatures is not severely degraded for as-cast samples but dramatically decreases for annealed samples, and DBT temperature is sensitive to the free-volume content.…”

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confidence: 99%

Temperature-induced ductile-to-brittle transition of bulk metallic glasses

Jiang

et al. 2013

Applied Physics Letters

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Uniaxial tensile and uniaxial compressive tests for Zr-based bulk metallic glasses (BMGs) were conducted at room and cryogenic temperatures, respectively. It was observed that both the change of macroscopic fracture mode from ductile shear fracture to brittle normal tensile fracture and microscopic fracture feature from micron-scaled vein patterns to nano-scaled dimples with decreasing test temperatures were identified, indicating a significant ductile-to-brittle transition (DBT) behavior. The mechanism of DBT behavior was revealed by the competition between the intrinsic critical shear strength τ0 and critical tensile strength σ0 at different temperatures.

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Tensile properties of ZrCu-based bulk metallic glasses at ambient and cryogenic temperatures

Cited by 20 publications

References 36 publications

Tensile Plastic Deformation Behavior of Zr<sub>70</sub>Ni<sub>16</sub>Cu<sub>6</sub>Al<sub>8</sub> Bulk Metallic Glass at Cryogenic Temperature

Tensile Plastic Deformation Behavior of Zr<sub>70</sub>Ni<sub>16</sub>Cu<sub>6</sub>Al<sub>8</sub> Bulk Metallic Glass at Cryogenic Temperature

Ambient temperature embrittlement of a Zr-based bulk metallic glass

Temperature-induced ductile-to-brittle transition of bulk metallic glasses

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