Abstract
The influence of composition and of grain size on the transformation of the high temperature alpha phase during cooling TiAl-based alloys has been studied using end-quench Jominy tests. Longitudinal sections of these quenched samples provide information, over a wide range of cooling rates, on the influence of composition and of the alpha grain size on the solid state transformations. The transformations occurring during cooling lead to two-phase structures (lamellar, Widmanstätten, feathery) and to single-phase structures (massive gamma or to retained alpha) and the factors which influence the balance between these two types of transformation have been investigated. The observations show that the phases formed on cooling can be strongly influenced by diffusion occurring during cooling and by the availability of nucleation sites. The factors favouring the formation of fully massively transformed samples have been clarified and some limited tensile data obtained are presented which have been obtained from fully massive samples which have been HIPped (aged) after quenching.
| Original language | English |
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| Title of host publication | Titanium Alloys for High Temperature Applications |
| Subtitle of host publication | A Symposium Dedicated to the Memory of Dr. Martin Blackburn - Proceedings of Symp. sponsored by the Titanium Committee of the Structural Materials |
| Pages | 25-33 |
| Number of pages | 9 |
| Volume | 2006 |
| Publication status | Published - 2006 |
| Externally published | Yes |
| Event | The Minerals, Metals & Materials Society Annual Meeting and Exhibition 2006 - San Antonio, United States of America Duration: 12 Mar 2006 → 16 Mar 2006 Conference number: 135th |
Conference
| Conference | The Minerals, Metals & Materials Society Annual Meeting and Exhibition 2006 |
|---|---|
| Abbreviated title | TMS Annual 2006 |
| Country | United States of America |
| City | San Antonio |
| Period | 12/03/06 → 16/03/06 |
Keywords
- End-quenching
- TiAl alloys
- Transformations