摘要
The welding of dissimilar materials is one of the challenging issues in the fabrication industry to obtain required quality welds using fusion welding methods.However,some processes recently improved interface bonding with low joint strength.Unfortunately,the major intermetallic compounds could not alleviate from the joint interface.Alternatively,solid-state welding methods revealed fewer intermetallics at the joint interface for dissimilar material welds.Among them,friction welding was chosen to join incompatible materials with the necessary properties successfully.Friction time is a critical parameter for obtaining strong welds through friction welding,apart from friction pressure,forging pressure,forging time,and rotational speed.Variability of friction time can change the strength of friction by changing mechanical properties such as tensile strength.This change of tensile strength is typically influenced by the intermixing region,dependent on friction time.In this experiment,carbon steel and stainless steel have been friction welded to test the impact of friction time on the joint interface where the substrate’s faying surface meets.This interface consists of the intermixing region of the two materials on which the friction welding is performed.The results showed an interesting variation in tensile strength,with varying friction time.The width of the intermixing zone increased gradually with friction time until and decreased with the further increasing.The strength of the welds obtained was the highest of 730 MPa at a friction time of 4 s and fell as friction time’s increased value after 4 s.
