Microstructure
Forging |
Casting & Forging |
Casting |
---|---|---|
Fine, homogeneous, equi-axed grain structure* free from phases that can be preferentially attacked in sea water. Hot forging densifies the structure, eliminating micro cavities.
*ASTM E112 grain size 5-6 typically observed |
Complex multi-phase microstructure with risk of semi-continuous anodic phases. | Grain structure free from phases that can be preferentially attacked in sea water. Coarse cast structure with coring (alloying element segregation across grains), with inter-granular and inter-dendritic micro cavities and non uniform grain size between sections of differing thickness. |