TY - JOUR
T1 - Formability enhancement in hot spinning of titanium alloy thin-walled tube via prediction and control of ductile fracture
AU - GAO, Pengfei
AU - YU, Chao
AU - FU, Mingwang
AU - XING, Lu
AU - ZHAN, Mei
AU - GUO, Jing
N1 - Funding Information:
The authors would acknowledge the funding support from the National Natural Science Foundation of China (No. 51875467 , 92060107 ), National Science Fund for Distinguished Young Scholars of China (No. 51625505), the Hong Kong Scholar Program (No. XJ2018010), the Young Elite Scientists Sponsorship Program by CAST (No. 2018QNRC001) and the Research Fund of the State Key Laboratory of Solidification Processing (NPU), China (Grant No. 2019-TS-10).
Publisher Copyright:
© 2021
PY - 2021
Y1 - 2021
N2 - The damage and fracture in hot spinning of titanium alloy is a very complex process under the combined effects of microstructure evolution and stress state. In this study, their dependences on processing parameters were investigated by an integrated FE model considering microstructure and damage evolution, and revealing the effects of microstructure and stress states on damage evolution. The results show that the inner surface of workpiece with the largest voids volume fraction is the place with the greatest potential of fracture. This is mainly attributed to the superposition effects of positive stress triaxiality and the smallest dynamic recrystallization (DRX) fraction and β phase fraction at the inner surface. The damage degree is decreased gradually with the increase of initial spinning temperature and roller fillet radius. Meanwhile, it is first decreased and then increased with the increases of spinning pass and roller feed rate, which can be explained based on the variations of β phase fraction, DRX fraction, stress state and tensile plastic strain with processing parameters. In addition, the dominant influencing mechanisms were identified and discussed. Finally, the thickness reduction without defect in the hot spinning of TA15 alloy tube is greatly increased by proposing an optimal processing scheme.
AB - The damage and fracture in hot spinning of titanium alloy is a very complex process under the combined effects of microstructure evolution and stress state. In this study, their dependences on processing parameters were investigated by an integrated FE model considering microstructure and damage evolution, and revealing the effects of microstructure and stress states on damage evolution. The results show that the inner surface of workpiece with the largest voids volume fraction is the place with the greatest potential of fracture. This is mainly attributed to the superposition effects of positive stress triaxiality and the smallest dynamic recrystallization (DRX) fraction and β phase fraction at the inner surface. The damage degree is decreased gradually with the increase of initial spinning temperature and roller fillet radius. Meanwhile, it is first decreased and then increased with the increases of spinning pass and roller feed rate, which can be explained based on the variations of β phase fraction, DRX fraction, stress state and tensile plastic strain with processing parameters. In addition, the dominant influencing mechanisms were identified and discussed. Finally, the thickness reduction without defect in the hot spinning of TA15 alloy tube is greatly increased by proposing an optimal processing scheme.
KW - Control of ductile fracture
KW - Dynamic recrystallization
KW - Forming limit
KW - Hot spinning
KW - Titanium alloy tube
UR - http://www.scopus.com/inward/record.url?scp=85113349059&partnerID=8YFLogxK
U2 - 10.1016/j.cja.2021.01.002
DO - 10.1016/j.cja.2021.01.002
M3 - Journal article
AN - SCOPUS:85113349059
SN - 1000-9361
JO - Chinese Journal of Aeronautics
JF - Chinese Journal of Aeronautics
ER -