Zhou, H.; Kong, F.; Wang, Y.; Hou, X.; Cui, N.; Sun, J. Deformation and Phase Transformation of Disordered α Phase in the (α + γ) Two-Phase Region of a High-Nb TiAl Alloy. Materials2021, 14, 4817.
Zhou, H.; Kong, F.; Wang, Y.; Hou, X.; Cui, N.; Sun, J. Deformation and Phase Transformation of Disordered α Phase in the (α + γ) Two-Phase Region of a High-Nb TiAl Alloy. Materials 2021, 14, 4817.
Zhou, H.; Kong, F.; Wang, Y.; Hou, X.; Cui, N.; Sun, J. Deformation and Phase Transformation of Disordered α Phase in the (α + γ) Two-Phase Region of a High-Nb TiAl Alloy. Materials2021, 14, 4817.
Zhou, H.; Kong, F.; Wang, Y.; Hou, X.; Cui, N.; Sun, J. Deformation and Phase Transformation of Disordered α Phase in the (α + γ) Two-Phase Region of a High-Nb TiAl Alloy. Materials 2021, 14, 4817.
Abstract
In this paper, the deformation and phase transformation of disorder α phase at (α + γ) two phase region in as-forged Ti-44Al-8Nb-(W, B, Y) alloy are investigated by hot compression and hot packed rolling. Detailed microstructural evolution demonstrates that the as-deformed microstructure is significantly affected by deformation conditions. The mircrostructure differences are mainly due to temperature drop and strain rate. The evolution of α lamelae into α grains is detailed descripted. Moreover, the disorder α lamellae can also be decomposed into some new α grains by the assisted decomposition mechanism of γ grains. Microstructure evolution model of current TiAl alloy at 1250 °C during hot rolling is built.
Keywords
TiAl alloy; disorder α phase; deformation behavior; phase transformation; continuous dynamic recrystallization; rolling
Subject
MATERIALS SCIENCE, Biomaterials
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
