UNS

9 cases · 41 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Product: Raw Material Condition: Damage Capture method: Micrography by SEM clear all

UNS — sub-branches

A03560 1A96061 1C28000 1C36000 1C60800 1C68700 1F32800 2G12110 1G41300 2J23055 1J91540 1N02200 1N04400 1N07718 2R50400 1R56400 1S17700 1S30300 1S30400 3S30409 1S31600 1S31603 2S32750 2S32760 2S42000 2

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Low magnification micrography transverse to the fracture surface of the WHEEL 1. The fracture is in the top of the image and there is a void (shrinkage) not connected to the fracture .
34
VIEW
ML00183 / Dec.2022
Ductile Behavior of an Aluminum Wheel
M - Aluminum Silicon MagnesiumP - CastingAp - AutomotiveCd - Ductile Behavior
Cm - Micrography by SEMDf - Fracture
Micrography, by scanning electron microscopy. The alloy is a precipitation hardened material, and the stains at the surface are associated to differential etching in second phases and inclusions.
35
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Micrography by SEMDf - Granular structure
Micrography of the plate in a section, showing the alpha grains plus beta phase microstructure in the middle of the thickness. The sample was mechanically-electrolitically polished and etched with HF+HNO3+H2O solution.
27
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by SEMDf - Alpha and Beta
Microstructural analysis of the valve body structure, close to the position where the cracking has occurred. The structure is ferritic austenitic, with a large amount of detrimental phases associated to the ferritic structure, probably sigma phase.
92
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - Micrography by SEMDf - Sigma
Aspect of a micrographic sample by scanning electron microscopy showing the external pipe surface, in the bottom, the fracture at the left side of the figure and several spots of pitting corrosion from the external surface. The polished section (transverse to the fracture and in a longitudinal section of the pipe) shows the morphology of the pit , 0.2 mm depth. Original magnification 50x.
54
VIEW
ML00012 / Aug.2017
Vibration Induced Fatigue in a 316/316L SS
M - Austenitic Stainless SteelP - Seamless PipeAp - OffshoreCd - Vibration Induced Fatigue
Cm - Micrography by SEMDf - Pitting
Micrographic aspect of the pitting corrosion at the knife surface. It is possible to see the typical pitting aspect of a localized corrosion that appears as a small dot at the surface but it is a big crater under the surface.
185
VIEW
ML00054 / Dec.2018
Cutlery Corrosion
M - Martensitic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Pitting Corrosion
Cm - Micrography by SEMDf - Pitting
Region of the localized thinning at the weld metal, in a metallographic section, as polished. In the base metal the hydride layer is continuous and no thinning is evident (left side of the figure) and in the weld metal it is detached and cracked (right side of the figure).
107
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Micrography by SEMDf - Localized Thinning
Casting defect identified in the micrographic section, as polished, of the sample removed from the blade. The total lenght of the defect detected by magnetic particle during inspection is 10 mm.
1041
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Micrography by SEMDf - Void

More from these cases

ML00183 — Ductile Behavior of an Aluminum WheelM - Aluminum Silicon MagnesiumP - CastingAp - AutomotiveCd - Ductile Behavior
Detail of the micrography transverse to the fracture surface of the WHEEL 1, close to the void, that is a region of impurities. The iron rich particles are brittle and with several microcracks, that did not propagate during the impact.
27
VIEW
ML00183 / Dec.2022
Ductile Behavior of an Aluminum Wheel
M - Aluminum Silicon MagnesiumP - CastingAp - AutomotiveCd - Ductile Behavior
Cm - Micrography by SEMDf - Cracks
Detail of the brittle iron rich particles with several microcracks, that did not propagate during the impact that lead to the fracture.
26
VIEW
ML00183 / Dec.2022
Ductile Behavior of an Aluminum Wheel
M - Aluminum Silicon MagnesiumP - CastingAp - AutomotiveCd - Ductile Behavior
Cm - Micrography by SEMDf - Brittle Cracks
Detail of the brittle iron rich particles with several microcracks, that did not propagate during the impact that lead to the fracture.
32
VIEW
ML00183 / Dec.2022
Ductile Behavior of an Aluminum Wheel
M - Aluminum Silicon MagnesiumP - CastingAp - AutomotiveCd - Ductile Behavior
Cm - Micrography by SEMDf - Brittle Cracks
ML00145 — Impact of a .380 Winchester on 6061 T6 PlateM - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Micrographic detail, by scanning electron microscopy, of the precipitation hardened granular structure. The stains are preferential etch of second particles.
32
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Micrography by SEMDf - Aligned particles
Micrography of the damaged plate close to the perforated hole, in the middle of the thickness, showing the strong plastic deformation of the structure and ductile secondary cracks.
13
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Micrography by SEMDf - Dimples
Micrographic detail of one ductile secondary crack. The inclusions are broken and creating cracks from them.
11
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Micrography by SEMDf - Dimples
Micrographic detail of broken inclusions and cracks created from them.
14
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Micrography by SEMDf - Ductile Crack
Micrographic detail of broken inclusions and cracks created from them.
13
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Micrography by SEMDf - Ductile Crack

+3 more from this case →

ML00144 — Impact of a .380 Winchester on Ti64 PlateM - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Micrographic detail by SEM, showing the beta phase EDS analysis was conducted in this microstructure and the results indicated 90.8%Ti + 6.8%Al + 2.4%V for the alpha phase (the dark grains as a matrix); and 84.7%Ti + 5.2%Al + 8.8%V + 1.2%Fe for the beta phase (light with aicular morphology inside the phase).
25
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by SEMDf - Alpha and Beta
Micrography by scanning electron microscopy of the plate section, close to the surface that suffered the impact. The projectile melted and created a film at the surface. The plate material presented a localized plastic deformation, aligning the grains. HF+HNO3+H2O chemical etch.
10
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by SEMDf - Melted film
Micrographic detail by scanning electron microscopy of the plate section, close to the surface that suffered the impact. The projectile melted and created a film at the surface. The plate material presented a localized plastic deformation, aligning the grains. HF+HNO3+H2O chemical etch.
11
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by SEMDf - Plastic Deformation
Micrographic detail by scanning electron microscopy of the shearing of the material due to the projectile impact. It is a very localized plastic deformation effect, and there are several microvoids opening in the microstructure (phase boundaries). HF+HNO3+H2O chemical etch.
15
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by SEMDf - Plastic Deformation
Micrographic detail by scanning electron microscopy of the shearing of the material due to the projectile impact. Inside the cracks it is possible to see dimples, HF+HNO3+H2O chemical etch.
19
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by SEMDf - Plastic Deformation

+9 more from this case →

ML00134 — Brittle Fracture of a Superduplex Valve BodyM - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Micrographic details by scaning electron microscopy. The structure is ferritic austenitic, with a large amount of detrimental phases associated to the ferritic structure, probably sigma phase.
85
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - Micrography by SEMDf - Sigma
High magnification details by scaning electron microscopy. The structure is ferritic austenitic, with a large amount of detrimental phases associated to the ferritic structure, probably sigma phase.
81
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - Micrography by SEMDf - Sigma
Higher magnification detail of the sigma phase by scaning electron microscopy.
76
VIEW
ML00134 / Aug.2020
Brittle Fracture of a Superduplex Valve Body
M - Super Duplex Stainless SteelP - Fabrication WeldAp - SubseaCd - Brittle Fracture
Cm - Micrography by SEMDf - Sigma
ML00054 — Cutlery CorrosionM - Martensitic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Pitting Corrosion
Detail of the micrographic aspect of the pitting corrosion at the knife surface.
168
VIEW
ML00054 / Dec.2018
Cutlery Corrosion
M - Martensitic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Pitting Corrosion
Cm - Micrography by SEMDf - Pitting
ML00005 — Environmental Hydrogen Damage in Ti PipeM - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Hydride layer at the internal surface of the pipe base metal, after Kroll etch.
71
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Micrography by SEMDf - Hydride Formation
Detail of the hydride layer at the internal surface of the pipe base metal, after Kroll etch.
62
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Micrography by SEMDf - Hydride Formation
ML00017 — Casting Defect in CA6NMM - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Region of a casting void in the blade. As polished.
33
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Micrography by SEMDf - Void