13 Apr '17
A scientific team at the Krasnoyarsk-based Siberian Federal University (SFU) is offering a new diffusion welding technique for heterogeneous materials to be used in a wide range of mechanical engineering fields. The team is led by Galina Zeer, an associate professor at SFU’s material science and material machining technology chair.
According to Ms. Zeer, her group calls for pressure welding to ensure better bonding through the use of an interlayer of a special material. The scientist is positive that this is a most preferable, if not the only, method of making diffusion joints with a required set of physical-mechanical properties.
“Using interlayers helps reduce chemical heterogeneity and thermodynamic instability… while substantially bringing down, or even taking out of the equation completely, deformative temperature impact on materials and parts to be welded,” she believes.
Galina Zeer underscored that the innovation will enable a reliable bonding of inhomogeneous materials without adversely affecting the materials’ original structure and characteristics. The quality of a welded joint will be improved, she added, through making sure it’s evenly thick, the powder interlayer is evenly dense, and residual porosity is reduced.