Optical Microscope

2 cases · 4 images for “fracture”

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Martensite Detail focus: Sampling and Analysis clear all

Optical Microscope — sub-branches

Micro by OM, picric acid+FeCl3+H2O etch 1 Nital Etched Micrography by OM 3

Results

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Low magnification micrography presenting segregation bands in a martensitic structure. In the segregated regions the Nital etch effect is lower and the bands appear lighter. The black spots and lines are inclusions (some elongated) in the band.

91

ML00182 / Jul.2022

Brittle Fracture of a LAS Fixing Rod

M - Low Alloy Medium Carbon QTP - StemAp - Mechanical IndustryCd - Brittle Fracture

Cm - Nital Etched Micrography by OMDf - Longitudinal Section

Micrography of a transverse section of the spring, at the surface showing pits full of deposits.

36

ML00172 / Mar.2021

Brittle Fracture of a LAS Valve Spring

M - Low Alloy Medium Carbon QTP - SpringAp - Oil and GasCd - Brittle Fracture

Cm - Nital Etched Micrography by OMDf - Transverse Section

More from these cases

ML00182 — Brittle Fracture of a LAS Fixing RodM - Low Alloy Medium Carbon QTP - StemAp - Mechanical IndustryCd - Brittle Fracture

63

ML00182 / Jul.2022

Brittle Fracture of a LAS Fixing Rod

M - Low Alloy Medium Carbon QTP - StemAp - Mechanical IndustryCd - Brittle Fracture

Cm - Micro by OM, picric acid+FeCl3+H2O etchDf - Longitudinal Section

ML00172 — Brittle Fracture of a LAS Valve SpringM - Low Alloy Medium Carbon QTP - SpringAp - Oil and GasCd - Brittle Fracture

24

ML00172 / Mar.2021

Brittle Fracture of a LAS Valve Spring

M - Low Alloy Medium Carbon QTP - SpringAp - Oil and GasCd - Brittle Fracture

Cm - Nital Etched Micrography by OMDf - Transverse Section