Recently, two rectangle hollow bar which was welded together was detached from each other after years of operation. Kindly see attached.
I would like to seek professional advise here on what could be the possible reasons for such failure?
It seem to me this was probably due to poor welding (the welded area seem to be lifted off from the base material) and hence, it could not take the operation load.
On the side note, the shiny portion seem to be brittle failure and the left side suffered quite a bit of deformation.