INVESTIGATION OF MECHANICAL AND MICROSTRUCTURES OF EUTECTIC WELDED AND BRAZE WELDING APPLICATION IN ALCU PIPE JOINTS

Abstract

One of the most important factors in cooling systems is ensuring tightness. For this, it is
necessary to form strong aluminum copper pipe connections. These connections working under
vibration should not leak during long-term use. In this study, aluminum and copper pipes joined by
eutectic welding and brazing method were investigated. Tensile test, impermeability and bursting
tests were applied to all samples. Microstructures at the junction interfaces were investigated under
scanning electron microscopy (SEM). As a result of the experimental studies, eutectic welding and
brazing connections were compared. Although the eutectic weld joint length is 50% shorter than
the brazed joint, the tensile test gave approximately the same value of 22 N/mm2. In the blast tests,
on the other hand, the eutectic source showed 16.67% higher pressure resistance.