Figure 11.

The typical fracture surface morphology of Fe–36Ni/sapphire joints (welded with a laser scanning speed of 50 mm/s) after shear strength tests on the sapphire side [69]. (a) the microstructure of the fracture surface occurred at the interface; (b) the macroscopic morphology of the fracture surface at Fe–36Ni alloy side; (c) the microstructure of the fracture surface located in the sapphire substrate close to the interface; (d) the magnified image of the marked zone II in (a); (e) the magnified image of the marked zone I in (a); (f) the magnified image of the marked zone in (c).