User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse




Journal Article

Deformation behavior of a β-solidifying TiAl alloy within β phase field and its effect on the β→α transformation


Han,  Fengbo
Theory and Simulation, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Chen, Y., Cheng, L., Yang, G., Lu, Y., & Han, F. (2018). Deformation behavior of a β-solidifying TiAl alloy within β phase field and its effect on the β→α transformation. Metals, 8(8): 605. doi:10.3390/met8080605.

Cite as: http://hdl.handle.net/21.11116/0000-0002-1B04-C
In this study, the deformation behavior of a Ti-40Al-10V (at.) alloy within β single phase field was examined by means of isothermal compression at 1300◦C under strain rates of 2 s−1, 0.2 s−1, and 0.02 s−1, as well as its effect on the subsequent β→α transformation. The results showed that the alloy behaved steady-state flow with dislocation creep as the predominant rate-controlling process. Dynamic recrystallization (DRX) evidently occurred during deformation, and its volume fraction was dramatically increased so that at the lowest strain rate (0.02 s−1), a full-DRX β structure was obtained. The preferentially dynamic migration of grain boundaries with lt;100gt; orientation was demonstrated to be the major DRX mechanism. The texture was characterized by a lt;100gt; + lt;111gt; double-fiber at 2 s−1, but gradually transformed into a simple rotated cube orientationunder 0.02 s−1, accompanied by a decreasing texture intensity. During the subsequent β→α transformation, two types of α morphology wereproduced with evident variant selection, namely, the Widmannstatten colony and martensitic laths. Texture simulation revealed that the α texture was solely determined by parent β texture, despite of the variant selections. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.