Atlas

3 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Welding Defect Capture method: Scanning Electron Microscope Detail focus: Intergranular Cracking clear all

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The intergranular morphology of the cracks, at the heat affected zone of the forging, indicates it is a cold cracking probably formed when the welded joint was not yet post welding heat treated. The actual hardness values at the HAZ is 270HV10, and when it was cracked it was probably a lot higher.

71

ML00178 / Jan.2022

Cold cracks in Cr-Mo Welded Forging

M - CrMo SteelP - ForgingAp - O&G Well DrillingCd - Welding Defect

Cm - Nital Etched Micrography by SEMDf - Intergranular Cracking

Intergranular morphology of the fracture in a scanning electron microscopy image.

65

ML00071 / Jan.2019

Reheating Cracking of a CrMo Vessel Weld

M - CrMo SteelP - In Field WeldAp - EnergyCd - Welding Defect

Cm - Fractography by SEMDf - Intergranular Cracking

The fracture presents an intergranular aspect, and evidences of incipient melting, indicating a liquation cracking has occurred at the plate coarse grain heat affected zone/fusion line.

57

ML00069 / May.2017

Liquation Cracks in SAW of Low Carbon Steel

M - Low Carbon SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect

Cm - Fractography by SEMDf - Intergranular Cracking

More from these cases

ML00178 — Cold cracks in Cr-Mo Welded ForgingM - CrMo SteelP - ForgingAp - O&G Well DrillingCd - Welding Defect

55

ML00178 / Jan.2022

Cold cracks in Cr-Mo Welded Forging

M - CrMo SteelP - ForgingAp - O&G Well DrillingCd - Welding Defect

Cm - Nital Etched Micrography by SEMDf - Intergranular Cracking

59

ML00178 / Jan.2022

Cold cracks in Cr-Mo Welded Forging

M - CrMo SteelP - ForgingAp - O&G Well DrillingCd - Welding Defect

Cm - Nital Etched Micrography by SEMDf - Intergranular Cracking