Structure and properties of friction welded joints in pearlitic steels, produced in the superplasticity temperature range

Special features of friction welding joints in creep-resisting nickel alloys VKNA-25 and EP975

“…The ultimate tensile strength at 20 and 9758C was determined on the specimens, the cross-section of which contained all the zones of the welded joint, both central and peripheral (Figure 4). The properties in the zones may greatly differ as a result of the fact that the linear speed of rotation in welding changes in the direction from the central axis to the edge from zero to the maximum value and, consequently, the heating rate and the distribution of temperature in the crosssection also change 5,8,9 . Impact toughness was determined on the standard specimens with a U-shaped notch.…”