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ML00044 - Feb.2017

Centrifugally Cast CuAl Bushing

Detail of the structure in the center of the thickness. Alpha grains and lamellar eutectoid structure.

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Detail of the . grains and lamellar .
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Material

Aluminum Bronze
  • UNS C95300
Ds

Description

The bushing was in operation in a motor. It was manufactured in alloy by a centrifugally cast process. The cast is columnar and presents alfa and a lamellar structure. The structure and properties indicate that it is in the “” condition.

C

Chemistry (% in weight)

Product Analysis

89.50Cu; 1.18Fe; 0.10Ni; 0.02Pb; 0.01Sn; 8.74Al.

Associated Images
The micrography of the transverse section shows coarse grains and biphasic structure. Alpha grains and a lamellar eutectoid structure can be observed in the material.
464
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Close to the External Surface
Micrographic detail of the structure at the external surface.
58
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Close to the External Surface
The micrography of the transverse section shows coarse grains and biphasic structure. No diferentes close to the internal surface. Alpha grains and a lamellar eutectoid structure can be observed in the material.
46
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Close to the Internal Surface
Micrographic detail of the structure at the internal surface.
38
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Close to the Internal Surface
Detail of the structure in the center of the thickness. Alpha grains and lamellar eutectoid structure.
28
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - In the Center of the Thickness
The macrography of the transverse section shows the columnar grains typical of a centrifugally cast material. The etch is the same as the adopted for the micrographies. The bushing thickness is 1/2".
41
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - Transverse Section AspectDf - Columnar Grains