What is unfused filler wire weld defect?

Unfused filler wire, also known as lack of fusion with filler wire, is a weld defect that occurs when the filler wire fails to fuse properly with the base metal or previously deposited weld metal. This defect typically arises due to improper welding parameters, inadequate heat input, or improper welding technique. Unfused filler wire can compromise the structural integrity and […]