The hardness measurement. The Brinell hardness test (Part 2).
For measuring Brinell hardness test is usually used a steel ball 10 mm in diameter and a load 3000kgf. However, since the test conditions such as the hardness a...
Author: Ivan Perfilyev
The crystals growth (Part 4).
The heat released during solidification is removed and the liquid crystal phase, and at a high rate of heat dissipation is high rate of crystal growth. In all c...
Welder Qualification Test (Part 5).
After performance of the control welded seam, the designation is applied on it and the name of the welder, position at test is entered, and also sample top tags...
The polymorphic transformations in metals (Part 3).
The required for homogeneous nucleation energy fluctuation is so great that it is in solid metals are not usually found. Before overcooling (or overheating) rea...
The lack of root penetration.
The lack of root penetration arises because of small current and high welding speed. The lack of root penetration is admissible defect. Repair of the lack of ro...