Scanning Electron Microscope

2 cases · 19 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Application: Structure Condition: Damage Standard: ASTM clear all

Scanning Electron Microscope — sub-branches

Fractography by SEM 5Nital Etched Micrography by SEM 8Surface Aspect by SEM 6

Results

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Micrography of the plate section, in the middle of the plate in a position where the projectile did not affect. Ferritic-pearlitic structure.
55
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Nital Etched Micrography by SEMDf - Ferrite and Pearlite
The fracture micromechanism is ductile for the pin that has been sheared in a condition of controlling the load carrying. Elongated Dimples.
453
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - Fractography by SEMDf - Elongated Dimples

More from these cases

ML00143 — Impact of a .308 Winchester on A36 PlateM - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Micrographic detail of the plate section, evidencing the non affected ferritic-pearlitic structure.
57
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Nital Etched Micrography by SEMDf - Ferrite and Pearlite
Detail of the margin of the perforated hole in the impact position. It is interesting to observe extreme plastic deformation created by the perforation expulsing the material from the hole, in the direction of the impact.
42
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface Aspect by SEMDf - Plastic Deformation
Margin of the perforated hole showing regions of fracture and a smooth appearance in the hole surface (right side of the figure). This smooth aspect was generated by the film of melted material from the bullet.
44
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Fractography by SEMDf - Ductile Fracture
The fracture created by the projectile impact is fully ductile. The material presented a sheared surface with elongated dimples.
45
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Fractography by SEMDf - Dimples
Fractographic detail of the ductile fracture generated by the projectile impact. The material presented a sheared surface with elongated dimples.
41
VIEW
ML00143 / Aug.2018
Impact of a .308 Winchester on A36 Plate
M - Low Carbon SteelP - Rolled PlateAp - StructureCd - Pierced
Cm - Fractography by SEMDf - Dimples

+11 more from this case →

ML00007 — Free Machining Brass in Shear PinM - BrassP - Machined PartAp - LiftingCd - Shear
The fracture surface is ductile and the micromechanism is dimples, elongated due to the shearing action.
83
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - Fractography by SEMDf - Ductile Fracture