图8. 760 ℃长期时效后Ni-Cr-W-Fe合金的拉伸断口形貌
Fig.8. SEM images of the fracture surface of Ni-Cr-W-Fe alloy after aging at 760 ℃ for 1000 h (a~c), 2000 h (d~f) and 3000 h (g~i)