Analysis of the Welding between P550 and In718 alloys

The high nitrogen austenite stainless steel P550 and Ni-base superalloy In718 have been welded with ERNi Cr Mo-3 as the solder wire,the bend test results showed that the face bend test sample and root bend test sample fractured when the bending angles were 55° and 30°,respectively. The reason for those results was that the welding between P550 and In718 alloys was low match welding,under condition,all the plastic deformation formed during bending process occurred in the deposited metal,but the elongation of the deposited condition,was too low to stop the fracture.