The polymorphic transformations in metals (Part 1).
The polymorphic metals atomic packing provide the minimum value of the free energy potential in some circumstances and become unstable in others circumstances. ...
Author: Ivan Perfilyev
The crystal growth (Part 2).
The outcrop of the crystal screw dislocation, Fig.1. It creates conditions for the steps formation with the height equal to vector shift dislocation. Especiall...
Welder Qualification Test (Part 2)
The requirements to welder qualification test vary for different weld configurations, including the sheet beveling, the sheets preparation to fillet welding, an...
The pore cluster
The pore cluster at the root of weld occurs because of the low current, high weld speed and irregular gas feed and lack of welding shielding against intake of m...
Tensile test (Part 7)
At less plastic metals the differences in the characteristics which are obtained in areas of elastic deformation and plastic deformation can be not so noticeabl...