My AMTECH 24" digging fork bought in, I think 2017, has just just snapped at the joint between the shaft and tines - please see pictures. I have only ever used this for light digging and it is regularly cleaned and oiled. There seems to have been some internal corrosion at this joint though nothing is visible from the exterior. I believe there may have been a weakness at the time of the original weld.

Could you advise whether, though out of warranty this could be repaired or replaced?