In the simulation results, the grain size is 3.2 x [10.sup.-8] [m.sup.2] -4.9 x [10.sup.-7] [m.sup.2], whereas metallographic test
results indicate that the grain size is 8.0 x [10.sup.-8] [m.sup.2]-8.1 x [10.sup.-7] [m.sup.2].
The validity of the porosity image was verified by destructive metallographic test
Specific services include, but are not limited to: structural steel, structural pre-cast concrete installation and fabrication inspection; non-destructive metal tests; elemental chemical analysis; impact, tension, bend, metallographic tests
; proof load, wedge and hardness tests of bolts/nuts; bridge bearing tests; nuclear density testing; field test fireproofing; concrete cylinder compression tests.
A set of material tests, such as: chemical composition analysis, metallographic tests, tensile testing at ambient temperature, were carried out.
Metallographic tests were made with the use of the optical microscopy.
The next stage for the characterisation of the tested materials was to conduct metallographic tests of the material's structure.
Additional metallographic tests conducted using the SEM have demonstrated that the inclusions are mainly sulphur compounds (MnS, FeS) and silicones.
Afterwards, the samples were cut in the plane perpendicular to the penetration axis and prepared for macro- and microscopic metallographic tests as well as for microhardness measurements on the cross section of penetrations.
Macroscopic Metallographic Tests. The macroscopic metallographic tests were carried out for samples 2-7.