Incomplete Fusion

A weld discontinuity where fusion did not occur between weld metal and the joint or adjoining weld beads.

Related Links

Weld Defects / Imperfections – Incomplete Root Fusion or Penetration – TWI
Weld Discontinuities – Part 1 Porosity – Incomplete Fusion – Incomplete Penetration
Issues with Incomplete Fusion
Incomplete Fusion – an overview | ScienceDirect Topics
Incomplete Fusion

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