This work was carried out within a NANOMET Project financed under the European Funds for Regional Development (contract no. POIG.01.03.01-00-015/08). The hydrostatic extrusion processes were carried out at the Institute of High Pressure Physics of the Polish Academy of Sciences.
Precipitation in a Nanograined 7475 Aluminium Alloy—Processing, Properties and Nanoanalysis†
Article first published online: 17 APR 2014
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 16, Issue 5, pages 482–485, May 2014
How to Cite
, Lewandowska, M., Wawer, K., Kozikowski, P., Ohnuma, M. and Kurzydlowski, K. J. (2014), Precipitation in a Nanograined 7475 Aluminium Alloy—Processing, Properties and Nanoanalysis. Adv. Eng. Mater., 16: 482–485. doi: 10.1002/adem.201400018
- Issue published online: 21 MAY 2014
- Article first published online: 17 APR 2014
- Manuscript Accepted: 31 MAR 2014
- Manuscript Received: 16 JAN 2014
The precipitation phenomena in 7475 nanograined aluminium alloy was analysed by means of microhardness measurements, small angle X-ray scattering and electron microscopy. The nanograined samples were obtained by the hydrostatic extrusion of solution annealed and water quenched samples. It has been established that low temperature ageing causes precipitation processes to occur. However, the precipitation phenomena in nanograined materials proceed differently to those in micrograined materials. Moreover, the particle strengthening is limited by enhanced grain boundary precipitation which does not contribute to an increase in strength (when dislocation slip is the dominant deformation mechanism) and by the smaller size of precipitates.