Effect of activation of weld edges on the formation of pores in fusion welding of titanium components

Abstract

The experimental results show that the nature of formation of the structure of the surface layer in the weld edges influences the depth of the porous surface layer, the intensity and extent of adsorption capacity of contaminants and, correspondingly, the thermally activated process of solid-phase interaction ahead of the front of the solidified pool and the level of defectiveness (porosity) in the welded joint.

Keywords:

• capillary-condensed and surface-condensed moisture
• hydrogen content
• layout of workpieces
• porosity
• titanium alloys