A finite-deformation constitutive model of bulk metallic glass plasticity

被引：85

作者：

Yang Q. ^{[1
]}

Mota A. ^{[1
]}

Ortiz M. ^{[1
]}

机构：

[1] Division of Engineering and Applied Science, California Institute of Technology, Pasadena

来源：

Computational Mechanics | 2006年 / 37卷 / 02期

关键词：

Bulk metallic glasses; Finite deformation; Free volume; Non-Newtonian viscosity; Shear band spacing;

D O I：

10.1007/s00466-005-0690-5

中图分类号：

学科分类号：

摘要：

A constitutive model of bulk metallic glass (BMG) plasticity is developed which accounts for finitedeformation kinematics, the kinetics of free volume, strain hardening, thermal softening, rate-dependency and non-Newtonian viscosity. The model has been validated against uniaxial compression test data; and against plate bending experiments. The model captures accurately salient aspects of the material behavior including: the viscosity of Vitreloy 1 as a function of temperature and strain rate; the temperature and strain-rate dependence of the equilibrium free-volume concentration; the uniaxial compression stress-strain curves as a function of strain rate and temperature; and the dependence of shear-band spacing on plate thickness. Calculations suggest that, under adiabatic conditions, strain softening and localization in BMGs is due both to an increase in free volume and to the rise in temperature within the band. The calculations also suggest that the shear band spacing in plate-bending specimens is controlled by the stress relaxation in the vicinity of the shear bands. © Springer-Verlag 2005.

引用

页码：194 / 204

页数：10

共 34 条

[1]

Argon A.S., Plastic deformation in metallic glasses, Acta Metall., 27, pp. 47-58, (1979)

[2]

Bruck H.A., Christman T., Rosakis A.J., Johnson W.L., Quasi-static constitutive behavior of Zr41.2Ti 13.8Cu12.5Ni10Be22.5 bulk amorphous alloys, Acripta Mater., 30, pp. 4296-4434, (1994)

[3]

Bruck H.A., Rosakis A.J., Johnson W.L., The dynamic compressive behavior of berryllium bearing bulk metallic glasses, J Mater Res, 11, pp. 503-511, (1996)

[4]

Busch R., Masuhr A., Johnson W.L., Thermodynamics and kinetics of Zr-Ti-Cu-Ni-Be bulk matallid glass forming liquids, Mater Sci Engng., A304-306, pp. 97-102, (2001)

[5]

Chen M.H., Goldstein M., Anomalous viscoelastic behavior of metallic glasses of Pd-Si-based alloys, J. Appl. Phys., 43, 1642-1648, (1972)

[6]

Conner R.D., Johnson W.L., Paton N.E., Nix W.D., Shear bands and cracking of metallic glass in bending, J Appl Phy, 94, 904-911, (2003)

[7]

Conner R.D., Rosakis A.J., Johnson W.L., Owen D.M., Fracture toughness determination for a berylliun-bearing bulk metallic glass, Scripta Mater., 37, 1373-1378, (1997)

[8]

Cuitino A., Ortiz M., A material-independent method for extending stress update algorithms from small-strain plasticity to finite plasticity with multiplicative kinematics, Engi Comput, 9, pp. 255-263, (1992)

[9]

Faupel F., Frank W., Macht M.P., Mehrer H., Naundorf V., Ratzke K., Schober H.R., Sharma S.K., Teichler H., Diffusion in metallic glasses and supercooled melts, Revi of Mode Phys, 75, 1, pp. 237-280, (2003)

[10]

Flores K.M., Dauskardt R.H., Mean stress effects on flow localization and failure in bulk metallic glass, Acta Mater., 49, 2527-2537, (2001)

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