Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10655711 | Intermetallics | 2005 | 6 Pages |
Abstract
The structural transformations activated during the formation of the lamellar microstructure have been studied in a Ti49Al47Cr2Nb2 alloy. By performing statistical analysis of the microstructure, a special attention has been paid to the orientations of the lamellae and to the interface relationships. Experiments were conducted on specimens in an as-HIPed condition as well in an isothermal forged plus annealed condition. In the annealed alloy, three mechanisms of the lamellar formation were evidenced depending upon the nucleation temperature: a heterogeneous transformation occurring at grain boundaries, a homogeneous nucleation in the α2 matrix and an interfacial nucleation of twin-related lamellae. The microstructural analysis of the as-HIPed alloy was aimed at determining the activated mechanisms among those evidenced in the annealed alloy.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Slim Zghal, Marc Thomas, Alain Couret,