High temperature deformation behavior of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass

Lee, Kwang Seok; Ha, Tae Kwon; Ahn, Soonho; Chang, Young Won

doi:10.1016/s0022-3093(02)01998-1

Cited by 56 publications

(41 citation statements)

References 12 publications

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“…High-temperature compression tests of the tungsten composite were performed at some selected temperatures below the glass transition temperature of metallic glass Zr 41.25 Ti 13.75 Ni 10 Cu 12.5 Be 22.5 (T g 5 ;628 K) [34,35] to reveal different failure modes of the composite. Two strain rates, 1 3 10 -3 s -1 and 1 3 10 -4 s -1 , were selected for the compression tests.…”

Section: B Compression Failure At High Temperaturementioning

confidence: 99%

Effects of tungsten fiber on failure mode of zr-based bulk metallic glassy composite

Zhang

Wang

et al. 2006

Metall Mater Trans A

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The authors systematically investigated the effects of tungsten fiber on failure mode as well as deformation and fracture mechanisms in tungsten fiber-reinforced Zr 41.25 Ti 13.75 Ni 10 Cu 12.5 Be 22.5 bulk metallic glassy composite under uniaxial compression at room and high temperatures. At room temperature, the failure mode of the composite changes from shear fracture to longitudinal splitting failure with increasing fiber volume fraction. Similar to the observations in monolithic metallic glasses, the shear fracture angle of the composite is approximately equal to 39;40 deg, indicating that the Mohr-Coulomb criterion is suitable to give the critical shear fracture condition of the composite. When the compression tests were performed below the glass transition temperature of Zr 41.25 Ti 13.75 Ni 10 Cu 12.5 Be 22.5 metallic glass T g , the deformation behavior of the composite strongly depends on the strain rates and the test temperature, which is quite similar to the deformation behavior of monolithic metallic glasses in the supercooled liquid region. The corresponding failure mode of the composite changes from shear or splitting fracture to bending failure with decreasing strain rate or increasing test temperature. The failure modes at the temperature near T g are mainly controlled by the metallic glass matrix due to the decrease in its viscosity at high temperature. Based on these multiple failure modes, the effects of test temperature and tungsten fiber volume fraction on deformation and fracture mechanisms are summarized.

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Section: B Compression Failure At High Temperaturementioning

confidence: 99%

Effects of tungsten fiber on failure mode of zr-based bulk metallic glassy composite

Zhang

Wang

et al. 2006

Metall Mater Trans A

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“…[14][15][16][17][18][19][20] It has also been reported recently that significant changes of physical properties occur in terms of flow behavior, magnetic and electrical properties and especially embrittlement characteristics due to structural relaxation followed by nanocrystallization, which can be viewed as a natural phenomenon exhibited in non-equilibrium amorphous alloys. [21][22][23][24][25][26][27] It is, thus, indispensable to understand the relationship between the annealing treatment in the supercooled liquid region and the mechanical properties in order to provide feasible forming conditions in terms of processing temperature, strain rate and annealing time.…”

Section: Introductionmentioning

confidence: 99%

Structural Relaxation and Crystallization of a Zr44Ti11Cu9.8Ni10.2Be25 Bulk Metallic Glass

et al. 2007

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The influence of annealing on the structural changes and the room temperature mechanical properties of a Zr 44 Ti 11 Cu 9:8 Ni 10:2 Be 25 bulk metallic glass has been investigated. The structural evolution upon relaxation or crystallization after annealing at a temperature within the supercooled liquid region was studied by thermal analysis, x-ray diffraction, transmission electron microscopy, extended x-ray absorption fine structure and dilatometer measurements. The effects of structural relaxation and nanocrystallization on the mechanical properties were also examined by hardness and compression tests using specimens annealed for various times. The apparent disappearance of plastic strain was found to be due to embrittlement induced by considerable crystallization of the amorphous phase.

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“…For the F5 mm alloy, small peaks superimposed on the diffuse halo can be seen, suggesting that a certain degree of crystallization has taken place. The calculation of the reduced crystallization enthalpy, obtained from the thermal analysis (V f ¼ [DH a ÀDH c ]/DH a , where V f is the volume fraction of the crystalline phase(s), DH a is the crystallization enthalpy of the pure amorphous alloy which is determined via measuring the exothermal peak of the DSC curve and DH c is the crystallization enthalpy of the partial crystallized alloy, see [12] for details) shown in Fig. 2, determines an approximately 12% volume fraction occupied by the crystalline phase(s).…”

Section: Introductionmentioning

confidence: 99%

Cooling rate effects on the microstructure and phase formation in Zr₅₁Cu_20.7Ni₁₂Al_16.3bulk metallic glass

Yan

Zou

Shen

2006

Science and Technology of Advanced Materials

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A detailed transmission electron microscope (TEM) study has been conducted to investigate the microstructures of the Zr 51 Cu 20.7 Ni 12 Al 16.3 metallic glass formed at different cooling rates. It has been found that the most competitive crystalline phase to the amorphous structure is an oxygen-stabilized FCC NiZr 2 -type phase, which in turn acts as the leading phase to trigger the formation of other crystalline phases in the slow-cooled alloy. r

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High temperature deformation behavior of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass

Cited by 56 publications

References 12 publications

Effects of tungsten fiber on failure mode of zr-based bulk metallic glassy composite

Effects of tungsten fiber on failure mode of zr-based bulk metallic glassy composite

Structural Relaxation and Crystallization of a Zr<SUB>44</SUB>Ti<SUB>11</SUB>Cu<SUB>9.8</SUB>Ni<SUB>10.2</SUB>Be<SUB>25</SUB> Bulk Metallic Glass

Cooling rate effects on the microstructure and phase formation in Zr₅₁Cu_20.7Ni₁₂Al_16.3bulk metallic glass

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High temperature deformation behavior of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass

Cited by 56 publications

References 12 publications

Effects of tungsten fiber on failure mode of zr-based bulk metallic glassy composite

Effects of tungsten fiber on failure mode of zr-based bulk metallic glassy composite

Structural Relaxation and Crystallization of a Zr<SUB>44</SUB>Ti<SUB>11</SUB>Cu<SUB>9.8</SUB>Ni<SUB>10.2</SUB>Be<SUB>25</SUB> Bulk Metallic Glass

Cooling rate effects on the microstructure and phase formation in Zr51Cu20.7Ni12Al16.3bulk metallic glass

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Cooling rate effects on the microstructure and phase formation in Zr₅₁Cu_20.7Ni₁₂Al_16.3bulk metallic glass