TY - JOUR
T1 - Investigation of the Flow Behavior of Air-Cooling Ti-6Al-4V Alloy after Superplastic Forming
AU - Han, Xiaoning
AU - Yang, Junzhou
AU - Li, Jinshan
AU - Wu, Jianjun
N1 - Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/2
Y1 - 2022/2
N2 - The flow behavior of Ti-6Al-4V alloy during the air-cooling process after superplastic forming (SPF) has been discussed. In high-temperature constant strain rate tensile tests, the selected temperatures were 930, 900, 800, 700, and 600 °C, and the initial strain rates were 10−2, 10−3, and 10−4/s. The optimized deformation temperatures were 800~900 °C and the strain rates were 10−4~10−3/s. Then, the evolutions of activation energy and deformation strain are also discussed, and the effects of dislocation density and deformation activation energy on flow behavior were consistent. In addition, unstable flow is mainly concentrated in the low-temperature and high strain-rate regions, and this is mainly caused by dynamic recrystallization (DRX). After the SPF process, the possibility of material damage gradually increases during the air-cooling process.
AB - The flow behavior of Ti-6Al-4V alloy during the air-cooling process after superplastic forming (SPF) has been discussed. In high-temperature constant strain rate tensile tests, the selected temperatures were 930, 900, 800, 700, and 600 °C, and the initial strain rates were 10−2, 10−3, and 10−4/s. The optimized deformation temperatures were 800~900 °C and the strain rates were 10−4~10−3/s. Then, the evolutions of activation energy and deformation strain are also discussed, and the effects of dislocation density and deformation activation energy on flow behavior were consistent. In addition, unstable flow is mainly concentrated in the low-temperature and high strain-rate regions, and this is mainly caused by dynamic recrystallization (DRX). After the SPF process, the possibility of material damage gradually increases during the air-cooling process.
KW - Air cooling
KW - Flow behavior
KW - Superplastic forming
KW - Ti-6Al-4V
UR - http://www.scopus.com/inward/record.url?scp=85125105215&partnerID=8YFLogxK
U2 - 10.3390/cryst12020294
DO - 10.3390/cryst12020294
M3 - 文章
AN - SCOPUS:85125105215
SN - 2073-4352
VL - 12
JO - Crystals
JF - Crystals
IS - 2
M1 - 294
ER -