TY - JOUR
T1 - Study on 8.5Nb-TiAI alloy with fine grains
AU - Yan, Yunqi
AU - Wang, Wensheng
AU - Zhou, Lian
PY - 2004/2
Y1 - 2004/2
N2 - In order to keep the first step in the aeronautics and astronautics industry, it is necessary and essential to develop high strength and high temperature resistance TiAl, based alloy containing high Nb. To break up the primary as-cast microstructures and to refine the grains is the method of improving the combined properties. A new alloy, whose nominal chemical composition is Ti-45Al-8.5Nb-0.3W-0.3B-0.05Y at % (TAWBY), is developed with as-cast grains as the size of 25nm. B2 and ω phase in this alloy take the orientation relationship as (110)B2// (0001)ω and [111]B2// [112̄0]ω. The as-annealing specimens were conducted with tensile tests and three-point wending tests after heat treatment, 1250°C, 1 h and 1310°C, 0.5h vacuums annealing, with DP and FL microstructures. Compared with mechanical properties for TAWBY alloy and K5 alloy, TAWBY alloy has already owned the best properties. Under the same condition, TAWBY alloy exhibits the perfect properties of K5 alloy and so on.
AB - In order to keep the first step in the aeronautics and astronautics industry, it is necessary and essential to develop high strength and high temperature resistance TiAl, based alloy containing high Nb. To break up the primary as-cast microstructures and to refine the grains is the method of improving the combined properties. A new alloy, whose nominal chemical composition is Ti-45Al-8.5Nb-0.3W-0.3B-0.05Y at % (TAWBY), is developed with as-cast grains as the size of 25nm. B2 and ω phase in this alloy take the orientation relationship as (110)B2// (0001)ω and [111]B2// [112̄0]ω. The as-annealing specimens were conducted with tensile tests and three-point wending tests after heat treatment, 1250°C, 1 h and 1310°C, 0.5h vacuums annealing, with DP and FL microstructures. Compared with mechanical properties for TAWBY alloy and K5 alloy, TAWBY alloy has already owned the best properties. Under the same condition, TAWBY alloy exhibits the perfect properties of K5 alloy and so on.
KW - 8.5Nb-TiAl based alloy
KW - Fine grains
KW - Mechanical properties
UR - http://www.scopus.com/inward/record.url?scp=2942528695&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:2942528695
SN - 1002-185X
VL - 33
SP - 120
EP - 124
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 2
ER -