Fractography by SEM

3 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Tempered Martensite Detail focus: Sampling and Analysis clear all

Results

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Broken tensile testpiece fractography showing predominantly dimples as the fracture micromechanism, and some integranular aspects. It shows that in this uniaxial and without stress concentration raisers, the material presented a ductile behavior.
30
VIEW
ML00182 / Jul.2022
Brittle Fracture of a LAS Fixing Rod
M - Low Alloy Medium Carbon QTP - StemAp - Mechanical IndustryCd - Brittle Fracture
Cm - Fractography by SEMDf - Broken Testpiece
Fractography of the broken Charpy V testpiece, in a high strength steel that absorbed 11 Joules at 20°C. Quasicleavage and dimples are the main fracture micromechanisms with some secondary cracks that appear to be intergranular, exactly as the fracture of the part.
48
VIEW
ML00161 / Mar.2020
Brittle Fracture of a High Strength Socket
M - Medium Carbon Tool SteelP - ToolAp - Oil and GasCd - Brittle Fracture
Cm - Fractography by SEMDf - Broken Testpiece
Aspect of the fracture surface in low magnification, showing a flat aspect (associated to a fatigue fracture micromechanims) and a rough aspect (associated to a ductile fracture micromechanism).
167
VIEW
ML00130 / Jun.2018
Fatigue Fracture of Overloaded Bolts
M - Low Alloy Medium Carbon QTP - FastenerAp - O&G Well DrillingCd - Mechanical Fatigue
Cm - Fractography by SEMDf - General View

More from these cases

ML00182 — Brittle Fracture of a LAS Fixing RodM - Low Alloy Medium Carbon QTP - StemAp - Mechanical IndustryCd - Brittle Fracture
Broken Charpy V testpiece fractography showing intergranular fracture micromechanism. It reveals the brittle material behavior when under critical conditions, like the one that was present in the service application (with a triaxial condition in the notch).
26
VIEW
ML00182 / Jul.2022
Brittle Fracture of a LAS Fixing Rod
M - Low Alloy Medium Carbon QTP - StemAp - Mechanical IndustryCd - Brittle Fracture
Cm - Fractography by SEMDf - Broken Testpiece
ML00161 — Brittle Fracture of a High Strength SocketM - Medium Carbon Tool SteelP - ToolAp - Oil and GasCd - Brittle Fracture
Fractography of the broken tensile testpiece, in a high strength steel (about 260Ksi Yield Strength) that presented 10% elongation. The fracture micromechanism in a static test is quasicleavage and dimples, with some secondary cracks that appear to be intergranular, exactly as the fracture of the part.
53
VIEW
ML00161 / Mar.2020
Brittle Fracture of a High Strength Socket
M - Medium Carbon Tool SteelP - ToolAp - Oil and GasCd - Brittle Fracture
Cm - Fractography by SEMDf - Broken Testpiece