Study on the Creep Behavior of a Ni₃Al-Based Single Crystal Alloy at 850°C/450 MPa

Figure 6

Microstructures of fracture longitudinal section of the single crystal alloy IC6SX with [111] orientation after being crept for 126.9 h and then up to fracture at 850°C/450 MPa. (a) Macroscopic metallographic structure (OM image); (b) fracture surface cracks (OM image); (c1) microcracks in the interior of the matrix (OM image); (c2) microcracks in the interior of the matrix (SEM image); (d1) secondary crack on the axial surface (OM image); (d2) secondary crack on the axial surface (SEM image).