Optical Microscope

1 case · 1 image

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Duplex Ferritic Austenitic Detail focus: Welded Joint clear all

Optical Microscope — sub-branches

NaOH Electrolytic Etched Micro 1

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Low magnification micrography of the valve at the welded joint of the body to the insert (fillet weld). The cracking was arrested at the position of this welded joint because the structures of the weld metal, insert and heat affected zones are tough (austenitic in the weld metal and insert, and free from sigma in the HAZ) .
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ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - NaOH Electrolytic Etched MicroDf - Welded Joint