Damage

1 case · 8 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Coarse Structure Standard: AISI clear all

Damage — sub-branches

Brittle Fracture 2Crack 1Cracks 1Fracture 2Intergranular Cracking 1Multiple cracks 1

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The circumferential welds presented several regions where the multiple cracks appeared, mainly revealed by dye check test.
49
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Aspect by NDTDf - Multiple cracks

More from these cases

ML00174 — Carburization of a 347 SS Welded JointM - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
The small sample removed for analysis. This wedge sample presents three faces: one polished face (that corresponds to the surface), one fractured face and one cut face.
38
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Testpiece aspectDf - Fracture
The small wedge sample is 4 mm deep in the thickness and the circumferential weld are is about 15 mm width where it appears in the internal side of the carcass. The image shows the crack surface (fracture) where the weld aspect is evident.
32
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Aspect Before AnalysisDf - Fracture
The fracture surface in the sample shows columnar grains in the weld and large facets in the heat affected zone (HAZ) close to the internal surface of the carcass (to the top of the image).
32
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Fractography by SEMDf - Brittle Fracture
Detail of the fracture in the heat affected zone, showing a flat fracture where the fracture is close to the surface of the plate, exposed to the high temperature exhausting gases.
24
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Fractography by SEMDf - Brittle Fracture
Detailed microstructure of the plate base metal, exposed to high temperature exhausting gases. Refined austenite, precipitation of carbides in the grain boumdaries and some cracks.
24
VIEW
ML00174 / Jul.2021
Carburization of a 347 SS Welded Joint
M - Austenitic Stainless SteelP - Fabrication WeldAp - EnergyCd - Carburization
Cm - Oxalic Acid Electrolytic EtchDf - Crack

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