Plastic Deformation

10 cases · 41 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

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Macrosection of the wire rope, transverse, showing 6 strands and an independent wire rope core (IWRC). Each strand presents three layers in a SEALE construction.
92
VIEW
ML00175 / Aug.2021
Localized External Wear of a Wire Rope
M - High Carbon SteelP - Wire RopeAp - Oil and GasCd - Wear
Cm - Transverse Section AspectDf - Plastic Deformation
Micrographic detail of the localized plastic deformation due to the fitting assembly, in the region where the fatigue has started.
30
VIEW
ML00167 / Aug.2020
Fatigue of a Flared Tubing Connection
M - Austenitic Stainless SteelP - TubingAp - EngineCd - Mechanical Fatigue
Cm - Oxalic Acid Electrolytic EtchDf - Plastic Deformation
Micrography of the longitudinal section from the fork tooth in the scoop. The microstructure is the same as in the scoop close to the handle, ferritic grains equiaxial and uniform, but at the cut surface the structure presents strong plastic deformation generated by a mechanical cutting.
36
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Micro by OM, HCl + Ethanol + Picric AcidDf - Plastic Deformation
Micrography of the nut in the longitudinal section, plastic deformation at the thread surface due to high local stresses, probably during assembling.
24
VIEW
ML00148 / Sep.2018
Brittle Fracture of a 420 SS Barrel Nut
M - Martensitic Stainless SteelP - Barrel NutAp - LiftingCd - Heat Treatment Defect
Cm - Kalling Etched Micrography by OMDf - Plastic Deformation
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.
31
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface AspectDf - Plastic Deformation
Aspect of the surface of the plate, by scanning electron microscopy, at the margin of the projectile impact position, showing a round crack (in the top of the figure).
10
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Surface Aspect by SEMDf - Plastic Deformation
The longitudinal section of the pin shows that it was deformed in a localized position, where the layer was detached, top side of the figure. The pin wall was plastically deformed decreasing the internal diameter.
222
VIEW
ML00146 / Jul.2018
Plastic Deformation of a SDSS Riser Pin
M - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
Cm - Longitudinal Section AspectDf - Plastic Deformation
Micrographic detail of the threaded body to bolt heat transition region, showing a variation in the grain size (of the previous austenite) and evidences of a deformed structure .
43
VIEW
ML00139 / Jun.2018
Hydrogen Fracture of a 17-4 PH Allen Bolt
M - Precipitation Hardened Stainless SteelP - Allen BoltAp - SubseaCd - Hydrogen Embrittlement
Cm - Kalling Etched Micrography by OMDf - Plastic Deformation

More from these cases

ML00175 — Localized External Wear of a Wire RopeM - High Carbon SteelP - Wire RopeAp - Oil and GasCd - Wear
One disassembled wire, 3.2mm diameter, from a strand. The wire presents strong plastic deformation. In a very localized area.
29
VIEW
ML00175 / Aug.2021
Localized External Wear of a Wire Rope
M - High Carbon SteelP - Wire RopeAp - Oil and GasCd - Wear
Cm - Aspect Before AnalysisDf - Plastic Deformation
ML00151 — Ferritic Stainless Steel of a Flatware ForkM - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Micrographic detail of the strong plastic deformation at the edge of the scoop in the tooth cutting location. The hardness at this region of strong plastc deformation is about 240HV1.
38
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Micro by OM, HCl + Ethanol + Picric AcidDf - Plastic Deformation
ML00148 — Brittle Fracture of a 420 SS Barrel NutM - Martensitic Stainless SteelP - Barrel NutAp - LiftingCd - Heat Treatment Defect
Micrographic detail of the nut in the longitudinal section, presenting cracks associated to the plastic deformation at the thread surface. These cracks were formed due to high local contact stresses.
19
VIEW
ML00148 / Sep.2018
Brittle Fracture of a 420 SS Barrel Nut
M - Martensitic Stainless SteelP - Barrel NutAp - LiftingCd - Heat Treatment Defect
Cm - Kalling Etched Micrography by OMDf - Plastic Deformation
ML00145 — Impact of a .380 Winchester on 6061 T6 PlateM - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
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.
28
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Surface Aspect by SEMDf - Plastic Deformation
Micrography of the damaged plate at the side of the bullet impact, top of the figure. The perforated hole expulsed the material to the top and bottom directions and the microstructure shows plastic deformation.
16
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Keller Etched Micrography by OMDf - Plastic Deformation
Micrographic detail of the plastically deformed microstructure at the side of the bullet impact, top of the figure. The perforated hole expulsed the material to the top and bottom directions.
17
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Keller Etched Micrography by OMDf - Plastic Deformation
Micrography of the damaged plate close to the perforated hole, in the middle of the thickness, showing the strong plastic deformation of the structure.
12
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Keller Etched Micrography by OMDf - Plastic Deformation
Micrography of the damaged plate close to the perforated hole, in the middle of the thickness, showing the strong plastic deformation of the structure, with the grains changing its direction to transverse to the thickness.
6
VIEW
ML00145 / Sep.2018
Impact of a .380 Winchester on 6061 T6 Plate
M - Aluminum Magnesium SiliconP - Rolled PlateAp - StructureCd - Pierced
Cm - Keller Etched Micrography by OMDf - Plastic Deformation

+4 more from this case →

ML00144 — Impact of a .380 Winchester on Ti64 PlateM - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Macrography of the 3/8" thickness titanium alloy plate, in a section. The side of bullet impact is to the top of the figure. The impact sheared the plate wall in a very localized position. HF+HNO3+H2O chemical etch.
20
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Transverse Section AspectDf - Plastic Deformation
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
Micrographic detail by scanning electron microscopy of the very localized plastic deformation between inclusions in the material creating longitudinal ductile secondary cracks. 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 - Plastic Deformation

+6 more from this case →

ML00146 — Plastic Deformation of a SDSS Riser PinM - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
The longitudinal section of the pin at the region of the thermal spray layer detachment, showing that the pin suffered a localized lateral bending with strong plastic deformation, responsible for the layer detachment. The figure shows the external surface (top of the figure) with the layer detachment (gray aspect), the thickness of the pin (deformed) and the internal surface (bright aspect).
124
VIEW
ML00146 / Jul.2018
Plastic Deformation of a SDSS Riser Pin
M - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
Cm - Longitudinal Section AspectDf - Plastic Deformation