Question

Welding defects caused due to thermal expansion and contraction

Answer 1

Welding defects :

Distortion in a weld results from the expansion and contraction of the weld metal and adjacent base metal during the heating and cooling cycle of the welding process. Doing all welding on one side of a part will cause much more distortion than if the welds are alternated from one side to the other.

Causes of welding defects :

• Other causes of porosity include:
• Dirty base material.
• Excessive gun angle.
• Extending the wire too far from the nozzle.
• Wet or contaminated shielding gas cylinders.

please mark branliest

Answer 2

Answer:

Distortion in a weld results from the expansion and contraction of the weld metal and adjacent base metal during the heating and cooling cycle of the welding process. Doing all welding on one side of a part will cause much more distortion than if the welds are alternated from one side to the other.