The University of Southampton
University of Southampton Institutional Repository

Quench sensitivity of toughness in an Al alloy: direct observation and analysis of failure initiation at the precipitate free zone

Morgeneyer, T.F., Starink, M.J., Wang, S.C. and Sinclair, I. (2008) Quench sensitivity of toughness in an Al alloy: direct observation and analysis of failure initiation at the precipitate free zone Acta Materialia, 56, (12), pp. 2872-2884. (doi:10.1016/j.actamat.2008.02.021).

Record type: Article


Analysis of toughness in 6156 Al-Mg-Si-Cu sheet has been performed using enhanced Kahn tear tests on samples quenched at different rates. Crack initiation energies were hardly affected by changing water quench temperature from 20°C to 60°C; however a significant reduction was evident on air cooling. Crack propagation energy was reduced for both 60°C water quenched and air cooled materials. Observation of failure initiation through synchrotron radiation computed tomography (SRCT), for the 60°C water quenched material 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. Failure was predominantly intergranular. Fractographic assessment revealed predominantly voiding and shear decohesion in the 20°C water quenched material. With the aid of the new findings past models on the influence of precipitate free zone parameters on toughness have been revised

PDF Morgeneyer_et_al,_Quench_Sensitivity_of_Toughness_.._Acta_Mater_2008_im.pdf - Accepted Manuscript
Download (2MB)

More information

e-pub ahead of print date: 24 March 2008
Published date: July 2008
Additional Information: Acknowledgements: The authors would like to acknowledge Alcan CRV for financial support and material supply, and Frederic Bron and Bernard Bes for technical discussion. We would also like to thank Jean-Yves Buffière for support in micro-computed tomography.
Keywords: AA6156, quench sensitivity, precipitate free zone, synchrotron radiation computed tomography, intergranular failure, aerospace, toughness, weldable, aluminium, precipitation, fractography, sem, tem
Organisations: Engineering Mats & Surface Engineerg Gp


Local EPrints ID: 50314
ISSN: 1359-6454
PURE UUID: 0d03f413-91f9-4562-a564-969749b63e80

Catalogue record

Date deposited: 14 Feb 2008
Last modified: 17 Jul 2017 14:53

Export record



Author: T.F. Morgeneyer
Author: M.J. Starink
Author: S.C. Wang
Author: I. Sinclair

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 supports OAI 2.0 with a base URL of

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.