Optical Microscope

11 cases · 40 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Brittle Behavior Detail focus: Microstructure clear all

Optical Microscope — sub-branches

As polished micrography 1H2SO4+HNO3+H3PO4 Etched Micro 1Kalling Etched Micrography by OM 3Micrography by OM 1NaOH Electrolytic Etched Micro 6Nital Etched Micrography by OM 28

Results

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Micrography of a longitudinal section of the pin, presenting a tempered martensitic structure with aligned delta ferrite and carbide phases.
80
VIEW
ML00046 / Jan.2018
Brittle Fracture of SS Shear Pin
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Intergranular Cracking
Cm - Kalling Etched Micrography by OMDf - Martensite, delta ferrite & carbides
Transverse section of the blade showing large grains of this poliycristaline cast material.
421
VIEW
ML00042 / Apr.2017
Gas Turbine Blade IN 939, Coated
M - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking
Cm - H2SO4+HNO3+H3PO4 Etched MicroDf - Coarse Structure
The cast iron microstructure is predominatly ferritic with graphite nodules.
169
VIEW
ML00040 / Apr.2017
Brittle Fracture of a Valve Stem
M - Nodular Cast IronP - Valve StemAp - ShipCd - Brittle Fracture
Cm - Nital Etched Micrography by OMDf - Graphite in Nodules

More from these cases

ML00046 — Brittle Fracture of SS Shear PinM - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Intergranular Cracking
Micrographic detail of the pin structure, in the longitudinal section, at the segregated band with aligned inclusions and phases, delta ferrite and carbides.
70
VIEW
ML00046 / Jan.2018
Brittle Fracture of SS Shear Pin
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Intergranular Cracking
Cm - Kalling Etched Micrography by OMDf - Martensite, delta ferrite & carbides
Micrographic detail of the pin structure, in the longitudinal section, presenting a martensitic matriz, aligned inclusions (grey, delta ferrite islands (poligonal white phases) and carbides (also white phases) surrounding the delta ferrite.
64
VIEW
ML00046 / Jan.2018
Brittle Fracture of SS Shear Pin
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Intergranular Cracking
Cm - Kalling Etched Micrography by OMDf - Martensite, delta ferrite & carbides