Continuing the subject of welding that was started in the previous post, here we will emphasize on welding discontinuities. Unfortunately, welding discontinuities can negatively affect the lifetime and the performance of a product. For this reason, many welds are subjected to various inspection tests (x-rays, liquid penetration etc.) in order to examine their quality. These inspection tests are performed by a welding inspector, who should be able to spot a variety of discontinuities. The particular report can help a new inspector recognize the most common discontinuities that appear on a x-ray film.
This short review contains radiographic images of the following discontinuities:
Offset or mismatch
Offset or mismatch with lack of penetration
External concavity or insufficient fill
Internal (root) undercut
Incomplete or lack of penetration
Interpass slag inclusions
Elongated slag lines
Lack of side wall fusion
Interpass cold lap
Root pass aligned porosity
Longitudinal root crack
After each image there is the description and the cause of discontinuity, as well as comments regarding how to distinguish the problematic areas on the film.
Hi, I am Christos, a Mechanical Engineer by profession (Ph.D.) and a Software Developer by obsession (10+ years of experience)! I founded this site back in 2011 intending to provide solutions to various engineering and programming problems.
Christos E. Samaras
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