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Experimental and computational analysis of toughness anisotropy in an AA2139 Al-alloy for aerospace applications

Experimental and computational analysis of toughness anisotropy in an AA2139 Al-alloy for aerospace applications
Experimental and computational analysis of toughness anisotropy in an AA2139 Al-alloy for aerospace applications
Fracture toughness anisotropy of AA2139 (Al-Cu-Mg) in T351 and T8 conditions has been investigated via mechanical testing of smooth and notched specimens of different geometries, loaded in the rolling direction (L) or in the transverse direction (T). Fracture mechanisms were investigated via SEM and synchrotron radiation computed tomography (SRCT). Contributions to failure anisotropy are identified with: (i) anisotropic initial void shape and growth, (ii) plastic behaviour including isotropic/kinematic hardening and plastic anisotropy, and (iii)nucleation at a 2nd population of 2nd phase particles leading to coalescence via narrow crack regions. A model based in part on the Gurson-Tvergaard-Needleman approach is constructed to describe and predict deformation behaviour, crack propagation and, in particular, toughness anisotropy. Model parameters are fitted using microstructural data and data on deformation and crack propagation for a range of small test samples. Its transferability has been shown by simulating tests of large M(T) samples.
9781617382277
4610-4619
International Conference on Fracture, NRCC, Ottawa
Morgeneyer, T.F.
7280d0bb-1ead-460e-a4a3-c0e5f0f2dcdf
Besson, J.
28b6e82d-9e34-409e-b771-d6a8f7d9b749
Proudhon, H.
a870ee03-71f8-443f-a7ad-58e5f4394edb
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Morgeneyer, T.F.
7280d0bb-1ead-460e-a4a3-c0e5f0f2dcdf
Besson, J.
28b6e82d-9e34-409e-b771-d6a8f7d9b749
Proudhon, H.
a870ee03-71f8-443f-a7ad-58e5f4394edb
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d

Morgeneyer, T.F., Besson, J., Proudhon, H., Starink, M.J. and Sinclair, I. (2009) Experimental and computational analysis of toughness anisotropy in an AA2139 Al-alloy for aerospace applications. In 12th International Conference on Fracture 2009 (ICF-12). International Conference on Fracture, NRCC, Ottawa. pp. 4610-4619 .

Record type: Conference or Workshop Item (Paper)

Abstract

Fracture toughness anisotropy of AA2139 (Al-Cu-Mg) in T351 and T8 conditions has been investigated via mechanical testing of smooth and notched specimens of different geometries, loaded in the rolling direction (L) or in the transverse direction (T). Fracture mechanisms were investigated via SEM and synchrotron radiation computed tomography (SRCT). Contributions to failure anisotropy are identified with: (i) anisotropic initial void shape and growth, (ii) plastic behaviour including isotropic/kinematic hardening and plastic anisotropy, and (iii)nucleation at a 2nd population of 2nd phase particles leading to coalescence via narrow crack regions. A model based in part on the Gurson-Tvergaard-Needleman approach is constructed to describe and predict deformation behaviour, crack propagation and, in particular, toughness anisotropy. Model parameters are fitted using microstructural data and data on deformation and crack propagation for a range of small test samples. Its transferability has been shown by simulating tests of large M(T) samples.

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More information

Published date: 2009
Additional Information: Acknowledgements The authors would like to acknowledge Alcan CRV for financial support and material supply, and Frédéric Bron and Bernard Bès for technical discussion. We would also like to thank Jean-Yves Buffière and Elodie Boller for support in micro-computed tomography.
Venue - Dates: conference; ca; 2009-07-12; 2009-07-17, Canada, 2009-07-12 - 2009-07-17
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 71737
URI: https://eprints.soton.ac.uk/id/eprint/71737
ISBN: 9781617382277
PURE UUID: 2b45ca8f-76af-441d-9292-c52e7e44988b

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Date deposited: 21 Dec 2009
Last modified: 03 May 2018 16:31

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Contributors

Author: T.F. Morgeneyer
Author: J. Besson
Author: H. Proudhon
Author: M.J. Starink
Author: I. Sinclair

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