Atlas

24 cases · 45 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Damage Capture method: Surface Aspect clear all

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Detail of the position where the projectile strike the plate. The plate suffered a localized plastic deformation.
18
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Surface AspectDf - Low Mag
Detail of the position where the projectile strike the plate. The plate suffered a localized perforation.
44
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface AspectDf - Low Mag
Detail of the position in the plate of impact with the projectile. No damage, only particles adhered at the surface.
36
VIEW
ML00142 / Aug.2018
Impact of a .308 Winchester on AR500 Plate
M - Low Alloy Wear ResistantP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Surface AspectDf - Low Mag
Detailed aspect of the cracks in the internal diameter surface, where the hardness level was too low. These are typical overloading cracks.
76
VIEW
ML00131 / Apr.2018
Brittle Failure of a Soft Roller Bearing
M - Wear Resistant SteelP - Roller BearingAp - Mechanical IndustryCd - Heat Treatment Defect
Cm - Surface AspectDf - Cracks
Aspect of the tubesheet after removal of the cooper alloy tubes and water cleaning. The corrosion is more intense in the regions of tube connection.
176
VIEW
ML00125 / Mar.2018
Dezincification of a Cooler Tubesheet
M - BrassP - PlateAp - ShipCd - Preferential Dissolution
Cm - Surface AspectDf - Corrosion
Nitronic 60 cylinder. Detailed aspect of the pitting in a low magnification microscope.
197
VIEW
ML00121 / Feb.2018
Pitting Corrosion in a Subsea System
M - Austenitic / MartensiticP - Rod & CylinderAp - SubseaCd - Pitting Corrosion
Cm - Surface AspectDf - Pitting
The macrography of the surface exposed to the combustion chamber presents multiple cracks, perpendicular to the internal diamater of the tube (left side of the figure). The cracks are located in the tube and propagated into the tube wall and welded joint to the plate (right side of the figure).
79
VIEW
ML00119 / Feb.2018
Thermal Fatigue of a Marine Boiler
M - Low Carbon SteelP - Fabrication WeldAp - ShipCd - Thermal Fatigue
Cm - Surface AspectDf - At the Surface
Aspect of the internal surface of the tube after longitudinal cut. This position is out of the damage area and only a small amount of deposits is evident.
216
VIEW
ML00104 / Dec.2017
Thermal Fatigue of a Boiler Tube
M - Low Carbon SteelP - Autogenously Welded TubeAp - BoilerCd - Thermal Fatigue
Cm - Surface AspectDf - Internal Surface

More from these cases

ML00144 — Impact of a .380 Winchester on Ti64 PlateM - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Detail of the position observed form the back side of the plate, where the projectile deformed the plate and cracked it.
19
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Surface AspectDf - Low Mag
Detailed aspect of the surface of the plate at the projectile impact position.
13
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Surface AspectDf - Melted film
ML00143 — Impact of a .308 Winchester on A36 PlateM - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Detail of the position where the projectile exited the plate. The plate suffered a localized perforation and the straight line is marked where the bullet was deviated from the painted device.
41
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface AspectDf - Low Mag
Detail of the margin of the perforated hole in the impact position. It is interesting to observe that the perforation caused the material to be expulsed from the hole, in the direction of the impact.
39
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface AspectDf - Plastic Deformation
Detail of the plate surface a little far from the perforated hole, in the side where the projectil stroke the plate. Drops of melted material from the bullet.
34
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface AspectDf - Melted film
ML00121 — Pitting Corrosion in a Subsea SystemM - Austenitic / MartensiticP - Rod & CylinderAp - SubseaCd - Pitting Corrosion
17-4 PH rod. Detailed aspect of the pitting in a low magnification microscope.
115
VIEW
ML00121 / Feb.2018
Pitting Corrosion in a Subsea System
M - Austenitic / MartensiticP - Rod & CylinderAp - SubseaCd - Pitting Corrosion
Cm - Surface AspectDf - Pitting
ML00119 — Thermal Fatigue of a Marine BoilerM - Low Carbon SteelP - Fabrication WeldAp - ShipCd - Thermal Fatigue
Higher magnification macrography (in a stereoscope) of the surface exposed to the combustion chamber, presenting multiple cracks perpendicular to the internal diamater of the tube (left side of the figure). The cracks are located in the tube and propagated into the tube wall and welded joint.
75
VIEW
ML00119 / Feb.2018
Thermal Fatigue of a Marine Boiler
M - Low Carbon SteelP - Fabrication WeldAp - ShipCd - Thermal Fatigue
Cm - Surface AspectDf - Thermal Fatigue Cracks
ML00104 — Thermal Fatigue of a Boiler TubeM - Low Carbon SteelP - Autogenously Welded TubeAp - BoilerCd - Thermal Fatigue
Aspect of the internal surface of the tube after longitudinal cut. This position is at the damage area where a thick deposit is evident.
186
VIEW
ML00104 / Dec.2017
Thermal Fatigue of a Boiler Tube
M - Low Carbon SteelP - Autogenously Welded TubeAp - BoilerCd - Thermal Fatigue
Cm - Surface AspectDf - Internal Surface
Aspect of the external surface of the tube, presenting a large circunferential crack.
171
VIEW
ML00104 / Dec.2017
Thermal Fatigue of a Boiler Tube
M - Low Carbon SteelP - Autogenously Welded TubeAp - BoilerCd - Thermal Fatigue
Cm - Surface AspectDf - External Surface
Aspect of the internal surface of the tube after cleaning, presenting small circunferential cracks.
144
VIEW
ML00104 / Dec.2017
Thermal Fatigue of a Boiler Tube
M - Low Carbon SteelP - Autogenously Welded TubeAp - BoilerCd - Thermal Fatigue
Cm - Surface AspectDf - Internal Surface