Kinetics of development of physical contact in diffusion welding of titanium

Abstract

Results of experimental investigations, carried out on specimens of OT4 and VT14 titanium alloys with microprojections simulating the roughness of actual surfaces, are used to determine the effect of the height of microprojections on the kinetics of development of physical contact in diffusion bonding. It is shown that with increase of the height of the microprojections, the rate of development of physical contact decreases. This is associated with the strain hardening of the metal in the contact zone determined by the localization of stresses and strains at the tips of the microprojections.

Keywords:

• Diffusion welding
• temperature
• pressure
• microroughness
• physical contact of the microroughness

Notes

Selected from Svarochnoe Proizvodstvo 2016 69(10) 25–29.