Nayak, S. S. ; Pabi, S. K. ; Murty, B. S. (2010) Al-(L12) Al3Ti nanocomposites prepared by mechanical alloying: synthesis and mechanical properties Journal of Alloys and Compounds, 492 (1-2). pp. 128-133. ISSN 0925-8388
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jallcom.2009.10.274
Abstract
The present paper reports the formation of nanocomposites containing α-Al and L12-Al3Ti in binary Al-Ti alloys containing 5, 10, 15, and 20 at.% Ti. Supersaturated solid solution of Ti in Al was observed after 20 h of mechanical alloying irrespective of the Ti content. Nanocomposites formed after mechanical alloying and subsequent annealing at 673 K for 2 h showed a high hardness (3.4 GPa), modulus (106.4 GPa) and density (95%). Hardness values of Al-(L12)Al3Ti nanocomposites obtained by nanoindentation were similar to hardness measured with microhardness. High strength of the nanocomposites was attributed to the formation of large volume fraction of nanocrystalline L12-Al3Ti particles and the ultrafine grain size of α-Al matrix.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Mechanical Alloying and Milling; Trialuminides; Nanocomposites; Dispersion Strengthening |
| ID Code: | 64018 |
| Deposited On: | 04 Oct 2011 08:34 |
| Last Modified: | 04 Oct 2011 08:34 |
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