Optical Microscope

3 cases · 12 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: UNS Detail focus: Ductile Crack clear all

Optical Microscope — sub-branches

Keller Etched Micrography by OM 1Micrography by OM 9Nital Etched Micrography by OM 2

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Micrograpic detail of the secondary ductile cracks.
13
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 - Ductile Crack
Micrography of the damaged plate at the side of the bullet impact, top of the figure. The projectile sheared the plate but did not perforate it, and the projectile materials (Cu and Pb) deposited at the .surface. HF+HNO3+H2O chemical etch.
9
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by OMDf - Ductile Crack
Micrography of a longitudinal section of the bolt at the thread fillet adjacent to the fracture, presenting a ductile cracking from the bottom of the fillet, propagating with a strong plastic deformation. The deformation lines of the cold formed process (thread cold rolling) are also deformed by the cracking propagation.
141
VIEW
ML00120 / Jun.2018
Ductile Rupture of a Carbon Steel Eye Bolt
M - Low Carbon SteelP - FastenerAp - AutomotiveCd - Overload
Cm - Nital Etched Micrography by OMDf - Ductile Crack

More from these cases

ML00144 — Impact of a .380 Winchester on Ti64 PlateM - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Micrography of the damaged plate at the side of the bullet impact, top of the figure. The projectile, impacted in the right side of the crack, sheared the plate but did not perforate it and created several longitudinal ductile secondary cracks. HF+HNO3+H2O chemical etch.
16
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by OMDf - Ductile Crack
Micrographic detail of the shearing of the material due to the projectile impact. It is a very localized effect. HF+HNO3+H2O chemical etch.
13
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by OMDf - Ductile Crack
Micrography of the 3/8" thickness titanium alloy plate, in a section. The impact side of the plate is to the top of the figure. The plate was sheared through wall in a very localized position. HF+HNO3+H2O chemical etch.
6
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by OMDf - Ductile Crack
Micrography of the 3/8" thickness titanium alloy plate, in a section. The impact side of the plate is to the top of the figure. The plate was sheared through wall in a very localized position. HF+HNO3+H2O chemical etch.
5
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by OMDf - Ductile Crack
Micrographic detail of the damaged plate. The projectile sheared the plate but did not perforate it and created longitudinal ductile secondary cracks. HF+HNO3+H2O chemical etch.
6
VIEW
ML00144 / Aug.2018
Impact of a .380 Winchester on Ti64 Plate
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Non-Pierced
Cm - Micrography by OMDf - Ductile Crack

+3 more from this case →

ML00120 — Ductile Rupture of a Carbon Steel Eye BoltM - Low Carbon SteelP - FastenerAp - AutomotiveCd - Overload
Micrographic detail of a longitudinal section of the bolt at the bottom of the thread fillet adjacent to the fracture, presenting a ductile cracking propagating with a plastic deformation. The deformation lines of the cold formed process are also deformed by the cracking propagation and there are some other small secondary cracks at 90° from the principal cracking.
133
VIEW
ML00120 / Jun.2018
Ductile Rupture of a Carbon Steel Eye Bolt
M - Low Carbon SteelP - FastenerAp - AutomotiveCd - Overload
Cm - Nital Etched Micrography by OMDf - Ductile Crack