1411 摩擦攪拌接合によるNi基超合金とAl合金の異材接合(OS14-3 締結・接合部のプロセスと信頼性評価-溶接、フレッティング-)

概要

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A Friction Stir Welding (FSW) technique was proposed as a new repairing technique for Ni-base superalloys. Dissimilar lap-joints composed of Ni-based superalloys and an Al alloy were fabricated, using an originally developed FSW machine. Mechanical properties and interface microstructures were systematically investigated, focusing on influences of many kinds of welding parameters, such as tool rotating speed, traverse speed and pin depth. A series of experiments showed that microstructure near the welding interface was significantly depending on the welding conditions. Under some specific conditions, lamellar structure and wavy interface were produced, in which intermetallic compounds were generated. Width of the intermetallic compounds was monotonically increased with the ratio between the tool rotational speed and the traverse speed, N/v. The joint strength was mainly governed by the pin depth. When fixing the pin depth, the joint strength showed the maximum value at a specific condition where the value of N/v was constant.
一般社団法人日本機械学会の論文
2010-10-09