Cracks

2 cases · 8 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

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As polished micrography of the longitudinal section of the stud at the cracking transverse to the axis. It looks like inclusions/possible banding regions are contributing for the cracking.
35
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - As polished micrographyDf - Cracks
Micrography of the longitudinal section of the stud showing internal cracks, secondary (not the cracks that opened the fracture). It is evident that the cracking from the thread fillet, of a ductile aspect, presented a different aspect than the internal cracks, of a brittle aspect.
31
VIEW
ML00127 / May.2018
Hydrogen Cracks of Cadmium Plated Studs
M - Low Alloy Medium Carbon QTP - Allen StudAp - Oil and GasCd - Hydrogen Embrittlement
Cm - As polished micrographyDf - Cracks

More from these cases

ML00136 — Hydrogen Cracks of Subsea StudsM - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
As polished micrography of the longitudinal section of the stud at the cracking transverse to the axis. It looks like inclusions/possible banding regions are contributing for the cracking.
33
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - As polished micrographyDf - Cracks
As polished micrography of the longitudinal section of the stud at the cracking transverse to the axis. It looks like inclusions/possible banding regions are contributing for the cracking.
36
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - As polished micrographyDf - Cracks
As polished micrography of the longitudinal section of the stud at the cracking transverse to the axis. It looks like inclusions/possible banding regions are contributing for the cracking and there are regions propagating witha ductile mechanism (a network of cracks in the left side of the figure).
34
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - As polished micrographyDf - Cracks
Micrographic detail of the bottom of the thread fillet, presenting secondary cracks of intergranular morphology.
34
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - Nital Etched Micrography by OMDf - Cracks
Micrography of the bottom of the thread fillet, presenting secondary cracks of intergranular morphology, propagating transverse to the stud axis, but presenting longitudinal openings.
27
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - Nital Etched Micrography by SEMDf - Cracks

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