高Fe、Cr含量多相Ni<sub>3</sub>Al基高温合金组织与性能研究进展

高Fe、Cr含量多相Ni₃Al基高温合金组织与性能研究进展

吴静,刘永长,李冲,伍宇婷,夏兴川,李会军

Recent Progress of Microstructure Evolution and Performance of Multiphase Ni3Al-Based Intermetallic Alloy with High Fe and Cr Contents

Jing WU,Yongchang LIU,Chong LI,Yuting WU,Xingchuan XIA,Huijun LI

表1 多相Ni₃Al基高温合金经1160~1280 ℃、10 h不同温度高温退火后组织参数及相应800 ℃、200 MPa蠕变性能数据^[65]

Table 1 Microstructure information and corresponding creep properties at 800 ℃, 200 MPa of the multiphase Ni₃Al-based intermetallic alloys after annealing treatments of 1160~1280 ℃ for 10 h^[65]

Temperature ℃	Interdendritic β		Size of γ'+γ dendrite			Steady-state creep rate ${\dot{ε}}_{s s}$ %·h^-1	Creep strain to fracture ε_total / %	Creep rupture life t_total / h
Temperature ℃	Volume fraction %	Width μm	γ'_Ⅰ μm	γ μm	γ'_Ⅰ+γ μm	Steady-state creep rate ${\dot{ε}}_{s s}$ %·h^-1	Creep strain to fracture ε_total / %	Creep rupture life t_total / h
1280	20.83	37.55	0.91±0.17	0.09±0.03	1.00±0.20	0.00114	1.401	611
1240	20.44	18.58	0.77±0.10	0.07±0.03	0.84±0.13	0.00145	1.736	626
1200	19.43	14.70	0.70±0.14	0.06±0.02	0.76±0.16	0.00175	2.398	643
1160	20.06	10.73	0.64±0.10	0.05±0.02	0.69±0.12	0.00203	3.212	665
As-cast	19.37	7.68	0.48±0.08	0.04±0.02	0.52±0.10	0.00607	2.094	194