Joining Metals by Combining Mechanical Stirring and Thermomechanical Treatment to Form a Globular Weld Structure
A method for joining metals in the semisolid state is presented. A model alloy Sn-15%Pb was used to demonstrate the concept. By presented process, dendritic microstructure of the weld zone can be avoided. Moreover, near-weld zone of the cold worked substrates which is affected by heat would have a globular structure due to a thermomechanical treatment. The two substrates were heated up locally in the joint line to the semisolid temperature range. At this point a stirrer was introduced into the weld seam in order to mix the two sides into a single uniform joint. Localized mechanical properties of different zones were examined using Shear Punch Test (SPT), showing a good strength in the weld zone and thermomechanically affected zone.
C.G. Kang, S.K. Kim and S.Y. Lee
B. Shalchi Amirkhiz et al., "Joining Metals by Combining Mechanical Stirring and Thermomechanical Treatment to Form a Globular Weld Structure", Solid State Phenomena, Vols. 116-117, pp. 397-401, 2006