Microstructure

2 cases · 4 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Pb Inclusions Capture method: Optical Microscope clear all

Microstructure — sub-branches

Alpha and Beta 3Two phases 1

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Low magnification metallography of the coaster after etching, revealing a casting structure of alpha plus beta phases. Beta is the dark brown matrix phase and alpha is the dendritic yellow phase.
45
VIEW
ML00156 / Jan.2020
Antique Silver Plated Decorative Piece
M - BrassP - Decorative PieceAp - OrnamentalCd - Non Destructive Examination
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Alpha and Beta
The micrography of the pin far from the fracture surface shows a biphasic brass, and Pb inclusions that are intentional to give a free machining condition for the alloy.
76
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - FeCl3+HCl+H2O Etched MicroDf - Two phases

More from these cases

ML00156 — Antique Silver Plated Decorative PieceM - BrassP - Decorative PieceAp - OrnamentalCd - Non Destructive Examination
Metallography of the coaster after etching, revealing a casting structure of alpha plus beta phases. Beta is the dark brown matrix phase and alpha is the dendritic yellow phase.
48
VIEW
ML00156 / Jan.2020
Antique Silver Plated Decorative Piece
M - BrassP - Decorative PieceAp - OrnamentalCd - Non Destructive Examination
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Alpha and Beta
High magnification metallography of the coaster after etching, revealing a casting structure of alpha plus beta phases. Beta is the dark brown matrix phase and alpha is the dendritic yellow phase. The non destructive preparation created a metallographic surface not well polished (full of grinding scratches).
48
VIEW
ML00156 / Jan.2020
Antique Silver Plated Decorative Piece
M - BrassP - Decorative PieceAp - OrnamentalCd - Non Destructive Examination
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Alpha and Beta