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Microstructural Evolution and Dynamic Recrystallization Behavior of β–γ TiAl‐based Alloy during Hot Compression
Author(s) -
Jiang Hai Tao,
Zeng Shang Wu,
Tian Shi Wei,
Wu Bo,
Zhao Ai Min,
Xia Zhen Hai
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600546
Subject(s) - materials science , dynamic recrystallization , isothermal process , deformation (meteorology) , alloy , dislocation , recrystallization (geology) , metallurgy , composite material , strain rate , compression (physics) , hot working , thermodynamics , paleontology , biology , physics
In this paper, the hot deformation behavior of a TNM TiAl‐based alloy (Ti–44.45Al–3.80Nb–1.01Mo–0.29Si–0.14B) is investigated via isothermal compression tests. The experimental results demonstrate that the critical strain for dynamic recrystallization gradually decreases with increasing deformation temperature. At the initial stage of the low‐temperature deformation process, the deformation is mainly caused by dislocation glide in the γ and β phases. When the deformation reaches a certain level, dislocation glide in the β and the DRX γ phases dominates the deformation. In the high‐temperature deformation process, the deformation is the result of dislocation glide in the α and β phases.