The authors thank R. Hempel and P. Voigt, Titanium Solutions GmbH, Bremen, Germany, for providing the hot-forged material. A part of this research was conducted in the framework of the Austrian FFG project 832040 “energy drive,” Research Studios Austria.
Microstructure and Texture Evolution in an Intermetallic β-Stabilized TiAl Alloy During Forging and Subsequent Isothermal Annealing†
Article first published online: 4 DEC 2013
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 16, Issue 4, pages 445–451, April 2014
How to Cite
Gaitzenauer, A., Stark, A., Gosslar, D., Clemens, H. and Mayer, S. (2014), Microstructure and Texture Evolution in an Intermetallic β-Stabilized TiAl Alloy During Forging and Subsequent Isothermal Annealing. Adv. Eng. Mater., 16: 445–451. doi: 10.1002/adem.201300265
- Issue published online: 31 MAR 2014
- Article first published online: 4 DEC 2013
- Manuscript Accepted: 22 OCT 2013
- Manuscript Received: 18 JUL 2013
Microstructure and texture formation were investigated in an intermetallic Ti–43.4Al–4.2Nb–1.1Mo–0.1B (in at.%) alloy after near conventional forging in the (α + β) phase field region and subsequent isothermal annealing treatments at 1150 °C for different holding times. During forging and the following cooling process a fine grained microstructure is formed consisting of lamellar α2/γ colonies and elongated grains of the βo phase situated at the colony boundaries. The isothermal annealing treatment leads to a significant change of the forged microstructure. After hot-forging, all phases show typical fiber textures as it is expected for uniaxial deformation. In the as-forged state the α2(α) phase exhibits a 〈11-20〉 fiber, the βo(β) phase has a strong and sharp fiber and the γ phase shows a and a weaker fiber. After additional annealing at 1150 °C for 8 h, the textures are almost unchanged in contrast to the microstructure.