Constitutive modeling of deformation and damage in superplastic materials

M. A. Khaleel; H. M. Zbib; E. A. Nyberg

doi:10.1016/S0749-6419(00)00036-X

Constitutive modeling of deformation and damage in superplastic materials

M. A. Khaleel, H. M. Zbib, E. A. Nyberg

Research output: Contribution to journal › Article › peer-review

103 Scopus citations

Abstract

The superplastic deformation and cavitation damage characteristics of a modified aluminum alloy are investigated at a temperature range from 500 to 550°C. The baseline alloy is AA5083. Nominally this alloy contains about 4.5% Mg, 0.8% Mn, 0.2% Cr, 0.037% Si, 0.08% Fe and 0.025% Ti by weight. The experimental program consists of uniaxial tension tests and digital image analysis for measuring cavitation. The experiments reveal that evolution of damage is due to both nucleation and growth of voids. A viscoplastic model for describing deformation and damage in this alloy is developed based on a continuum mechanics framework. The model includes the effect of strain hardening, strain rate sensitivity, dynamic and static recovery, and nucleation and growth of voids. The model predictions compare well with the experimental results.

Original language	English
Pages (from-to)	277-296
Number of pages	20
Journal	International Journal of Plasticity
Volume	17
Issue number	3
DOIs	https://doi.org/10.1016/S0749-6419(00)00036-X
State	Published - 2001
Externally published	Yes

Funding

The US Department of Energy Office of Energy Research funded this work at the Pacific Northwest National Laboratory under contract DE-AC06-76RLO 1830.

Funders	Funder number
U.S. Department of Energy
Pacific Northwest National Laboratory	DE-AC06-76RLO 1830

Keywords

Aluminium
Constitutive equations
Damage deformations
Superplasticity

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10.1016/S0749-6419(00)00036-X

Cite this

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abstract = "The superplastic deformation and cavitation damage characteristics of a modified aluminum alloy are investigated at a temperature range from 500 to 550°C. The baseline alloy is AA5083. Nominally this alloy contains about 4.5% Mg, 0.8% Mn, 0.2% Cr, 0.037% Si, 0.08% Fe and 0.025% Ti by weight. The experimental program consists of uniaxial tension tests and digital image analysis for measuring cavitation. The experiments reveal that evolution of damage is due to both nucleation and growth of voids. A viscoplastic model for describing deformation and damage in this alloy is developed based on a continuum mechanics framework. The model includes the effect of strain hardening, strain rate sensitivity, dynamic and static recovery, and nucleation and growth of voids. The model predictions compare well with the experimental results.",

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AU - Zbib, H. M.

AU - Nyberg, E. A.

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AB - The superplastic deformation and cavitation damage characteristics of a modified aluminum alloy are investigated at a temperature range from 500 to 550°C. The baseline alloy is AA5083. Nominally this alloy contains about 4.5% Mg, 0.8% Mn, 0.2% Cr, 0.037% Si, 0.08% Fe and 0.025% Ti by weight. The experimental program consists of uniaxial tension tests and digital image analysis for measuring cavitation. The experiments reveal that evolution of damage is due to both nucleation and growth of voids. A viscoplastic model for describing deformation and damage in this alloy is developed based on a continuum mechanics framework. The model includes the effect of strain hardening, strain rate sensitivity, dynamic and static recovery, and nucleation and growth of voids. The model predictions compare well with the experimental results.

KW - Aluminium

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KW - Damage deformations

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Constitutive modeling of deformation and damage in superplastic materials

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