Fracture toughness criteria.
For a crack in a metal to expand under the influence of the stretching forces, it is necessary to spend some work on the plastic deformation’ flowing alon...
Author: Ivan Perfilyev
Generation of crystals in liquid (Part 4).
To a large extent, the process of generation is affected by the inclusion surface’ topography. If there are depressions on the surface, the critical dimen...
Certification of welders (Part 1).
Certification results of welding technology obtain practical value only after certification of individual welders for executing welding works in compliance with...
Pores in welded seam (Part 2).
Tunnel pores represent one more type of extended pores. Usually tunnel pores with formation of contraction cavity represent the most dangerous defect in the cas...
Tensile tests (PART 6).
When conducting tensile tests the beginning of yield point is marked with decreasing of apparatus values or recording device. Yield point can be determined by o...