TY - JOUR
T1 - Microstructure evolution and tensile properties of Ti-6.5Al-2Zr-Mo-V alloy processed with thermo hydrogen treatment
AU - Zhang, Hanlei
AU - Kou, Hongchao
AU - Yang, Jieren
AU - Huang, Dong
AU - Nan, Hai
AU - Li, Jinshan
N1 - Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - In the current work, Ti-6.5Al-2Zr-Mo-V alloy is processed with hydrogenation, solution-aging and dehydrogenation, that is, thermo hydrogen treatment (THT). Microstructure evolution and phase transformation during THT are investigated. Results show that after aging the microstructure consists of primary α needle, fine acicular eutectoid product and undecomposed βH. At the end of dehydrogenation, the microstructure is composed of fine, fragmented β pieces. Recrystal α grain also occurs in some of the dehydrogenated samples. The fragmented β pieces form by phase transformation βH→α+β+H ↑, and the recrystallization occurs via δ→α+H ↑. Tensile results show that the strength of Ti-6.5Al-2Zr-Mo-V alloy after THT increases remarkably, which is about 30% higher than that of the as-cast alloy.
AB - In the current work, Ti-6.5Al-2Zr-Mo-V alloy is processed with hydrogenation, solution-aging and dehydrogenation, that is, thermo hydrogen treatment (THT). Microstructure evolution and phase transformation during THT are investigated. Results show that after aging the microstructure consists of primary α needle, fine acicular eutectoid product and undecomposed βH. At the end of dehydrogenation, the microstructure is composed of fine, fragmented β pieces. Recrystal α grain also occurs in some of the dehydrogenated samples. The fragmented β pieces form by phase transformation βH→α+β+H ↑, and the recrystallization occurs via δ→α+H ↑. Tensile results show that the strength of Ti-6.5Al-2Zr-Mo-V alloy after THT increases remarkably, which is about 30% higher than that of the as-cast alloy.
KW - Hydrogen
KW - Mechanical characterization
KW - Microstructure
KW - Phase transformation
KW - Recrystallization
KW - Titanium alloys
UR - https://www.scopus.com/pages/publications/84908395638
U2 - 10.1016/j.msea.2014.09.104
DO - 10.1016/j.msea.2014.09.104
M3 - 文章
AN - SCOPUS:84908395638
SN - 0921-5093
VL - 619
SP - 274
EP - 280
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -