FAQ Cracking in Haynes 188 During Welding

 "WHAT CAUSES HAYNES 188 TO CRACK WHEN BEING ELECTRON BEAM WELDED? WE HAVE CRACKS IN THE CENTER OF THE WELD THE WHOLE LENGTH."
In these cases we find that it’s best practice to conduct a failure analysis study to be able to better determine exactly what the cause is of your application cracking during the EB welding process. Haynes 188 is a solid-solution strengthened superalloy, but from a materials standpoint is generally electron beam weldable as-is. Your issue is most likely due to either rapid cooling causing high residual stress or contamination of the part (lubricant, milling chips, etc). Typically cracking such as you are experiencing can be remedied by adjusting your welding parameters.