Application of kiffusion welding method in radar systems development

Modern radars are very sensitive to heat removal systems performance. Liquid refrigerant in cooling channels provides heat removing. To improve cooling efficiency, a new complex channel form was developed. The new construction is realized by diffusion welding method.

The author of the article examines a weld joint that was made by diffusion welding method. Heat-treatable aluminum alloy AK4-1 was applied. The joint was examined by means of light and electron microscopy as well as electron probe microanalysis. By these means the author gains data on phase composition of the joint and studies grain arrangement of the matter near it. As a result of the research the author states that during the welding on the lateral surfaces of the welded items and next-to-joint area matter grain recrystallization takes place. On the same areas metal lifting of barrel shape are clearly visible. This phenomenon is caused by surfaces deformation and extrusion of the matter. Results obtained prove that it is possible to realize complex channel forms for radar cooling system by diffusion welding method.