TY - JOUR
T1 - Hot Deformation Behavior of a Novel Near-β Titanium Alloy Ti-5.5Mo-6V-7Cr-4Al-2Sn-1Fe in (α+β) Phase Region
AU - Gai, Jinyang
AU - Cheng, Jun
AU - Li, Jinshan
AU - Du, Zhaoxin
AU - Zhang, Wen
AU - Yu, Sen
AU - Yu, Zhentao
N1 - Publisher Copyright:
© Copyright © 2020 Gai, Cheng, Li, Du, Zhang, Yu and Yu.
PY - 2020/1/14
Y1 - 2020/1/14
N2 - The hot deformation behavior of a novel near-beta titanium alloy Ti-5.5Mo-6V-7Cr-4Al-2Sn-1Fe in (α+β) phase region in the temperature of 605~755°C and strain rate range of 10−3~10−1/s−1 was investigated on the Gleeble-3800 thermo-mechanical simulator. The results showed that the deformation parameters can have a significant influence on flow softening behavior and the microstructure evolution, as well as dynamic recrystallization is remarkable at temperature 755°C and strain rate 10−3s−1. The flow stress decreases with the increase of temperature and decrease of strain rate. With the rise of temperature and strain rate, the content of α phase gradually decreases. During the thermal deformation process, the α phase content decreases with the increase of the strain rate and the size of α phase decreases with increasing temperature. αGB is short rod or spherical. And α phase precipitated after short-term aging preferentially nucleated within the grains after aging treatment. Moreover, the thermal-mechanical process does not induce α phase generation compared to general heat treatment.
AB - The hot deformation behavior of a novel near-beta titanium alloy Ti-5.5Mo-6V-7Cr-4Al-2Sn-1Fe in (α+β) phase region in the temperature of 605~755°C and strain rate range of 10−3~10−1/s−1 was investigated on the Gleeble-3800 thermo-mechanical simulator. The results showed that the deformation parameters can have a significant influence on flow softening behavior and the microstructure evolution, as well as dynamic recrystallization is remarkable at temperature 755°C and strain rate 10−3s−1. The flow stress decreases with the increase of temperature and decrease of strain rate. With the rise of temperature and strain rate, the content of α phase gradually decreases. During the thermal deformation process, the α phase content decreases with the increase of the strain rate and the size of α phase decreases with increasing temperature. αGB is short rod or spherical. And α phase precipitated after short-term aging preferentially nucleated within the grains after aging treatment. Moreover, the thermal-mechanical process does not induce α phase generation compared to general heat treatment.
KW - flow softing
KW - hot deformation behavior
KW - microstructure evolution
KW - near-beta titanium alloy
KW - α phase spheroidized
UR - http://www.scopus.com/inward/record.url?scp=85078768736&partnerID=8YFLogxK
U2 - 10.3389/fmats.2019.00343
DO - 10.3389/fmats.2019.00343
M3 - 文章
AN - SCOPUS:85078768736
SN - 2296-8016
VL - 6
JO - Frontiers in Materials
JF - Frontiers in Materials
M1 - 343
ER -