Damage

2 cases · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Martensite and Retained Austenite Detail focus: Banded Structure clear all

Damage — sub-branches

Corrosion 1Fabrication Defect 1Fatigue 1

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Low magnification micrography of a longitudinal section of the valve body, in the center of the thickness. As expected for this high strength steel, the microstructure is martensitic, but with segregation bands.
48
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ML00162 / Apr.2020
Valve Body Crack Growth from Weld Defects
M - Low Alloy Medium Carbon QTP - Valve BodyAp - O&G Well DrillingCd - Fatigue Induced by a Defect
Cm - Nital Etched Micrography by OMDf - Banded Structure
Micrographic detail of the pin microstructure at the longitudinal section showing a tempered martensitic structure and a band of retained austenite.
62
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ML00085 / Nov.2017
Corrosion Fatigue of a Martensitic SS Pin
M - Martensitic Stainless SteelP - Forged PinAp - O&G Well DrillingCd - Corrosion Fatigue
Cm - Kalling Etched Micrography by OMDf - Banded Structure