Preliminary studies on friction welding of sintered P/M steel preforms to wrought mild steel

Abstract

Continuous drive friction welding studies on sintered powder metallurgical (P/M) steel preformswrought mild steel combination are reported in the present study. The work is a preliminary study to optimise the friction welding parameters and data generated by the present work is expected to contribute to friction welding of dissimilar and similar sintered P/M preforms to wrought metals or sintered P/M preforms -a planned future research work. Sound welds were obtained with all welding parameter combinations studied. The mechanical properties of welds were comparable to those of sintered P/M steel. Sintered P/M preforms deformed to a greater extent than wrought mild steel due to their low flow stress and thermal conductivity. The sintered density and other properties of the P/M preforms were found to dictate the deformation at the interface and consequently the weld strength. The results indicate that the current approach can be extended to other combinations of sintered P/M preforms.

Advances in friction welding process: A review

“…Furthermore, a sound joint such as the base metal fracture without crack was made by the autocompleting friction welding method when the CSF value nearly equaled to one. Rao et al 90 reported on the continuous drive friction welding of sintered P/M steel preforms to wrought mild steel. The present investigation aims at understanding the FW characteristics of sintered P/M steel preformswrought mild steel dissimilar metal welds.…”

“…This can be achieved with a compressive rubbing force below that which causes the ceramic to fracture. Aluminium, especially pure aluminium, will 30 Sizes of workpieces for a joint system I and b joint system II 91 31 Schematics of FW 93 29 Microhardness versus distance data from locations 90 bond to aluminium oxide and magnesium for yttrium oxide stabilised zirconium oxide ceramics. The process can be carried out using conventional FW apparatus but under a protective atmosphere to avoid metal oxidation.…”

Microstructure and fracture characteristics in vacuum brazed joint of super-Ni/NiCr laminated composite

“…For some special applications, it is necessary to join super-Ni/NiCr laminate to one similar or dissimilar material as integrated components [1][2][3]. Therefore, weldability of super-Ni/NiCr laminate must be well established.…”