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Microstructure and Crystallography of α Phase Nucleated Dynamically during Thermo‐Mechanical Treatments in Metastable β Titanium Alloy
Author(s) -
Fan Jiangkun,
Li Jinshan,
Zhang Yudong,
Kou Hongchao,
Germain Lionel,
SiredeySchwaller Nathalie,
Esling Claude
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.201600859
Subject(s) - materials science , microstructure , nucleation , recrystallization (geology) , alloy , phase (matter) , titanium alloy , metastability , softening , dynamic recrystallization , nickel titanium , metallurgy , composite material , crystallography , hot working , shape memory alloy , thermodynamics , paleontology , chemistry , physics , organic chemistry , quantum mechanics , biology
The α phase nucleated dynamically during the thermo–mechanical coupling process in titanium alloy is really interesting but difficult to sufficiently ascertain. In the present work, the α phase nucleation behavior, the orientation relationship between α/β as well as the phase transformation kinetics during hot deformation of Ti‐5553 alloy were investigated in‐depth. Results reveal that the “necklace” microstructure formed. The Burgers orientation relationship between α/β phases has been destroyed gradually. The β → α phase transformation is obviously retarded during the hot compression due to the competitive effect of softening process (dynamic recovery/recrystallization). These results could provide valuable reference for process optimization and the microstructural evolution controlling.