Bolt

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Detail focus: Microhardness Indentations clear all

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Micrographic detail of the banded region, with microhardness identations indicating that the longitudinal bands are harder than the rest of the structure. The measurements in the band are 466, 447 and 460 HV50g; and out of the band are 358, 360 and 362 HV50g, from the top to the bottom.
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ML00077 / Jun.2018
Hydrogen Cracking of LAS Subsea Bolts
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - Nital Etched Micrography by OMDf - Microhardness Indentations