Sampling and Analysis

154 cases · 925 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Sampling and Analysis — sub-branches

At the Surface 77Base Metal 65Broken Testpiece 9Close to the External Surface 41Close to the Internal Surface 33External Surface 27Fusion Line 29General View 132Heat Affected Zone 82In the Center of the Thickness 36In the Center of the Weld 2Internal Surface 33Longitudinal Section 102Low Mag 17Microhardness Indentations 1Microhardness identations 2Radial Section 3T/4 of the external surface 2Transverse Section 60Weld Metal 96Weld Repair 7Welded Joint 69

Results

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Ferritic perlitic microstructure, banded, in the center of the 1" thick C-Mn plate. Refined Structure.
10
VIEW
ML00025 / Dec.2017
1" CMn Steel Plate for Pressure Vessel
M - CMn SteelP - PlateAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Longitudinal Section
The graphite nodules remain at the surface and the matrix was consumed during high temperature exposition.
103
VIEW
ML00001 / Dec.2017
Thermal Fatigue of Cast Iron
M - Nodular Cast IronP - CastAp - SiderurgyCd - Thermal Fatigue
Cm - Nital Etched Micrography by OMDf - At the Surface