Macroanalysis by the fractures’ type (Part 1)
Fracture is the failure surface of a product or the whole piece of metall. According to cracks fracture cracks, holes, blowholes, stratifications, gaps, large s...
Author: Ivan Perfilyev
The assessment methods of the weld metal tendency to hot cracking (Part 2).
During the process of crystallization the weld metal continuously undergoes to lateral deformations, due to which the longitudinal crystallizational crack can b...
The line of pores in the welded seam.
The line of pores in the welded seam occurs because of low current, high weld speed and irregular gas feed or high humidity. The line of pores is a minor defect...
Growth of crystals (part 1).
Growth of nucleuses happens as a result of migration of liquid atoms to them. However, in a lot of cases, it doesn’t come to this one-faced atoms transfer. Atom...
Methods of evaluation of the weld metal tendency to the formation of hot cracks (Part 1).
The maximum value and the rate of rise of the internal plastic deformations (that the metal can withstand without destruction in the process of welding) have be...