The University of Southampton
University of Southampton Institutional Repository

Direct observation and analysis of failure initiation and crack progression in tear toughness of two Al sheet alloys

Record type: Conference or Workshop Item (Paper)

The failure initiation and crack progression in tear toughness tests on 2 sheet alloys have been analysed through synchrotron radiation computed tomography (SRCT), supported by TEM, SEM and DSC studies. For the quench sensitive 6156 Al-Mg-Si-Cu alloy propagation energy was reduced by changing water quench temperature from 20°C to 60°C. Observation of fail-ure initiation for a 60°C water quenched sample revealed failure ahead of the crack tip of grain boundaries oriented at 45° to the main loading axis and crack “tongues” extending into the material ahead of the main crack. The fracture toughness of AA2139 (Al-Cu-Mg-Ag) is anisotropic. SRCT reveals that three-dimensional distribution and morphology of pores and defects in the as-received state are anisotropic, with chains of voids and void elongation in the L (longitudinal) direction. For toughness testing in L-T orientation (T is transverse), voids ahead of the crack grow and link in the L direction. In T-L tests, voids ahead of the crack tip also grow in the loading direction. New models for crack propagation and toughness have been derived on the basis of the quantitative microstructural data.

Full text not available from this repository.

Citation

Morgeneyer, T.F., Sinclair, I., Besson, J. and Starink, M.J. (2008) Direct observation and analysis of failure initiation and crack progression in tear toughness of two Al sheet alloys In Aluminium Alloys. Wiley-VCH. 7 pp, pp. 1504-1510.

More information

Published date: 2008
Venue - Dates: 11th International Conference on Aluminium Alloys (ICAA 11), 2008-09-22 - 2008-09-26
Keywords: aluminium, rolled, sheet, aerospace, toughness, crack, precipitation hardened, synchrotron radiation computed tomography, microtomography, precipitate free zone, crack propagation, quench sensitivity, anisotropy
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 52461
URI: http://eprints.soton.ac.uk/id/eprint/52461
ISBN: 9783527323678
PURE UUID: 09c299e0-468a-4035-9cc5-045eae6e4d2f

Catalogue record

Date deposited: 01 Jul 2008
Last modified: 17 Jul 2017 14:40

Export record

Contributors

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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×