高Nb-TiAl合金的高温变形行为及其板材的性能

周海涛, 侯湘武, 汪彦博, 肖旅, 袁勇, 孙京丽

High-temperature Deformation Behavior and Properties of High Nb Containing TiAl Alloy

ZHOU Haitao, HOU Xiangwu, WANG Yanbo, XIAO Lv, YUAN Yong, SUN Jingli

表1 Ti-44Al-8Nb-0.2W-0.2B-Y合金与几种典型变形高Nb-TiAl合金拉伸性能的比较[8, 9, 24~28]

Table 1 Tensile properties comparison of current Ti-44Al-8Nb-0.2W-0.2B-Y alloy and several typical deformed high Nb containing TiAl alloys[8, 9, 24~28]

Alloy Condition Room temperature 800℃ Rm/MPa A/% Rm/MPa A/% Ti-45Al-(8-9)Nb-(W, B, Y) Forged, DP [27] 912 2.3 648 59 Rolled, NG [8] 668 1.5 500 2 Ti-46Al-9Nb [25] Rolled, near γ 754 2.5 380 78 Ti-43Al-6Nb-1B [28] Forged 975 0.8 790 40 Forged, FL 860 1.0 755 32 Ti-44Al-8Nb-(W, B, Y) [24] Forged 930 0.4 740 7 Ti-45Al-10Nb[26] Extruded, DP 1069 0.78 834a 5.4 Ti-45Al-7Nb-0.3W[9] Rolled, near γ ≈815 - ≈715 - Ti-44Al-8Nb-0.2W-0.2B-Y Rolled, DP 1084 0.98 758 ≈58