Engine

1 case · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Bainite Capture method: Optical Microscope Detail focus: Martensite clear all

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Micrography of the shaft at the surface, in a region where a thermal spray layer was not applied. The microstructure at the shaft surface is martensitic (low carbon martensite) typical of a quenched and tempered condition for this low alloy steel. The heat treatment was probably conducted before the thermal spray layer was applied.
24
VIEW
ML00108 / Dec.2017
Thermal Spray Layer in a Pinion Shaft
M - High Strength Low AlloyP - ShaftAp - EngineCd - Coating Defect
Cm - Nital Etched Micrography by OMDf - Martensite

More from these cases

ML00108 — Thermal Spray Layer in a Pinion ShaftM - High Strength Low AlloyP - ShaftAp - EngineCd - Coating Defect
Micrographic detail of the shaft at the surface, in a region where a thermal spray layer was not applied. The microstructure is martensitic (low carbon martensite) typical of a quenched and tempered condition for this low alloy steel. The heat treatment was probably conducted before the thermal spray layer was applied.
29
VIEW
ML00108 / Dec.2017
Thermal Spray Layer in a Pinion Shaft
M - High Strength Low AlloyP - ShaftAp - EngineCd - Coating Defect
Cm - Nital Etched Micrography by OMDf - Martensite