Solid
-
State Welding Processes State Welding Processes
• Joinin
g p takes
p
lace without fusion at the
interface
• No liquid or molten phase is present at the joint
• Two surfaces brought together under pressure
• For strong bond, both surfaces must
be clean:
–
No oxide films
– No residues
–
No metalworking fluids No metalworking fluids
– No adsorbed layers of gas
– No other contaminants……