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ML00007 - Dec.2020

Free Machining Brass in Shear Pin

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.

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The of the far from the surface shows a biphasic brass, and inclusions that are intentional to give a free machining condition for the alloy.
M

Material

Brass
  • UNS C36000
  • ASTM B 16
Ds

Description

The 1" has been sheared in service, controlling the load carrying of a . The is ductile.

C

Chemistry (% in weight)

Product Analysis

60.0Cu; 37.05Zn; 0.12Fe; 2.53Pb; 0.13Sn.

Associated Images
The fracture micromechanism is ductile for the pin that has been sheared in a condition of controlling the load carrying. Elongated Dimples.
453
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - Fractography by SEMDf - Elongated Dimples
Uniform structure of the 1" shear pin all through the section. The edge is the fracture surface.
108
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - FeCl3+HCl+H2O solution Etched MacroDf - Longitudinal Section
The fracture surface is flat and smashed due to the shearing action.
87
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - Aspect Before AnalysisDf - Fracture
The fracture surface is ductile and the micromechanism is dimples, elongated due to the shearing action.
83
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - Fractography by SEMDf - Ductile Fracture
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
The micrography of the pin at the fracture surface shows a strong plastic deformation as expected during shearing.
70
VIEW
ML00007 / Dec.2020
Free Machining Brass in Shear Pin
M - BrassP - Machined PartAp - LiftingCd - Shear
Cm - FeCl3+HCl+H2O Etched MicroDf - Plastic Deformation