Table 1 Considerations for welding procedures (O'Brien 2011 )
From: Welding of dissimilar non-ferrous metals by GMAW processes
Considerations | Observations |
|---|---|
Fundamentals | - In contrast to similar material welding, the differences between the base metal and the weld metal must be carefully analyzed. |
- The most important consideration is the weld metal composition and its properties. | |
Service consideration | - The combination of metal joints depends upon the mechanical and physical properties, microstructural stability, and resistance to oxidation and corrosion in-service. |
- The mechanical and physical properties of the weld metal as well as those of the two heat-affected zones must be suited for the intended service. | |
Filler metal selection | - The selected filler metal must be compatible with the base metals to be joined so that the four major areas (metallurgical compatibility, mechanical properties, physical properties, corrosion properties) of requirements are met by the welds produced. |
- Filler metal selection can best be accomplished by using a combination of scientific principles and manufacturing and service experience of the industrial disciplines involved. | |
Welding process | - Because of its effect on the dilution and heat input, welding process selection constitutes an important factor in dissimilar metal welding. In GMAW, the metal transfer control and the shielding gases need to be determined. |