Rajendran, V. ; Muthu Kumaran, S. ; Jayakumar, T. ; Palanichamy, P. ; Shankar, P. ; Baldev Raj, (2009) Microstructure and ultrasonic behaviour on thermal heat-treated Al-Li 8090 alloy Journal of Alloys and Compounds, 478 (1-2). pp. 147-153. ISSN 0925-8388
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09258...
Related URL: http://dx.doi.org/10.1016/j.jallcom.2008.11.067
Abstract
Ultrasonic velocity and attenuation measurements have been carried out on the as-received and thermally treated 8090 Al-Li alloys (T8771). Ultrasonic velocities, density and elastic moduli show a maximum at the thermally treated temperature of 463 K due to the influence of δ' phase precipitation. The decrease in velocity beyond 463 K is associated with the initiation of dissolution of δ' and δ phases and also the presence of small fraction of S' phase. Overaging could be identified at 673 K from the changes in ultrasonic velocities and attenuation. The observed pronounced maxima in ultrasonic velocities and minima in attenuation at 470 and 593 K are associated with precipitation of δ' and S' phases, respectively.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | 8090 Al-Li Alloys; Microstructure; Ultrasonic Velocity; Attenuation |
| ID Code: | 40344 |
| Deposited On: | 23 May 2011 14:06 |
| Last Modified: | 23 May 2011 14:06 |
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