Fig. 10: The stress on the oxide layer of the inner wall of the hole.

a initial state, b the overall stress condition at 100 h, c the stress state in the X direction, and d the stress state in the Y direction. And the simulations of the stress distribution of the overall oxide layer of the alloy changing with time: e 20 h (initial state), f 50 h, g 100 h, and h 200 h. (In the figures, the compressive stress is negative; X, Y direction is parallel to the surface, Z direction is perpendicular to the surface).