Anisotropic Plastic Deformation and Damage in Commercial Al 2198 T8 Sheet Metal

Abstract:

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Deformation anisotropy of sheet aluminium alloy 2198 (Al-Cu-Li) has been investigated by means of mechanical testing of notched specimens and Kahn-type fracture specimens, loaded in the rolling direction (L) or in the transverse direction (T). Contributions to failure are identified as growth of initial voids accompanied by a significant nucleation of a second population of cavities and transgranular failure. A model based on the Gurson-Tvergaard-Needleman (GTN) approach of porous metal plasticity incorporating isotropic voids, direction-dependent void growth, void nucleation at a second population of inclusions and triaxiality-dependent void coalescence has been used to predict the mechanical response of test samples. The model has been successfully used to describe and predict the direction-dependent deformation behaviour, crack propagation and, in particular, toughness anisotropy.

Info:

Periodical:

Key Engineering Materials (Volumes 452-453)

Edited by:

A. Saimoto and M.H. Aliabadi

Pages:

97-100

DOI:

10.4028/www.scientific.net/KEM.452-453.97

Citation:

D. Steglich et al., "Anisotropic Plastic Deformation and Damage in Commercial Al 2198 T8 Sheet Metal", Key Engineering Materials, Vols. 452-453, pp. 97-100, 2011

Online since:

November 2010

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Price:

$35.00

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