Germann, L. ; Banerjee, D. ; Guédou, J. Y. ; Strudel, J. -L. (2005) Effect of composition on the mechanical properties of newly developed Ti2AlNb-based titanium aluminide Intermetallics, 13 (9). pp. 920-924. ISSN 0966-9795
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.intermet.2004.12.003
Abstract
Among titanium aluminides Ti2AlNb-based alloys have received considerable attention in recent years, as potential materials for high-temperature applications in jet engines. Several compositions based on Ti-22Al-25Nb with molybdenum, silicon, zirconium additions were developed. The investigated microstructures consist of bi-lamellar O-Ti2AlNb structure with α2-Ti3Al nodules, surrounded by a B2 matrix. Effects of Aluminium and Niobium contents are, especially, examined on tensile properties, on creep strength and on oxidation resistance. It is shown that a high Al/Nb ratio is required for a good oxidation resistance, but is associated with a loss of ductility. Reducing Nb results in a decrease of creep strength that can be compensated by zirconium and/or molybdenum additions which improve the creep resistance significantly without impairing ductility or yield stress.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | B. Mechanical Properties at High Temperatures; G. Aero-engine Components |
| ID Code: | 62985 |
| Deposited On: | 24 Sep 2011 15:14 |
| Last Modified: | 24 Sep 2011 15:14 |
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