Figure 15
The image presents atomic diagrams of a compressed section and a copper tube after 168 hours of air exposure. The diagrams are divided into two columns, each showing different samples labeled as 1, 4, 5, and 6. Each sample is represented by two 3D surface plots, one for the pressure-bearing section and one for the copper tube. The plots display height variations in nanometers, with color scales indicating the range of heights. The pressure-bearing section samples show varying surface textures and heights, while the copper tube samples exhibit different surface roughness and height variations.Atomic diagram of compressed section and copper tube after 168 hours of air exposure. Source (s): Authors’ own work