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Characterization of the Fracture of an Automobile Drum Brake

Published online by Cambridge University Press:  31 January 2012

N. López Perrusquia ,
M. A. Doñu ,
V. J. Cortez ,
D. Sánchez  and
F. Vázquez
N. López Perrusquia
Affiliation:
Instituto Politécnico Nacional. SEPI-ESIME U.P. Adolfo López Mateos, Zacatenco. México.D.F. 07738. México. E-mail: nlopezp0803@ipn.mx
M. A. Doñu
Affiliation:
Instituto Politécnico Nacional. SEPI-ESIME U.P. Adolfo López Mateos, Zacatenco. México.D.F. 07738. México. E-mail: nlopezp0803@ipn.mx
V. J. Cortez
Affiliation:
Univerisdad Autónoma Metropolitana Unidad Azcapotzalco, Av. San Pablo 180 Azcapotzalco 02200, México .D.F. Área de Ciencia de los materiales.
D. Sánchez
Affiliation:
Universidad Politécnica del Valle de México, Av. Mexiquense s/n, esquina Av. Universidad Politécnica, Col. Villa Esmeralda, C.P. 54910, Tultitlán, Estado de México.
F. Vázquez
Affiliation:
Universidad Politécnica del Valle de México, Av. Mexiquense s/n, esquina Av. Universidad Politécnica, Col. Villa Esmeralda, C.P. 54910, Tultitlán, Estado de México.
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Abstract

In this research we studied the fracture of a cast iron drum for 3.5 ton trucks, and it seeks to determine the causes that led to a series of cracks in different areas of the part of drum brake during the manufacturing process, casting or machining. The work followed the methodology usually used in failure analysis; we used the following analytical techniques: visual inspection, penetrating liquids, fractography, metallography, chemical analysis and mechanical testing of hardness. The analysis of the automotive part surface is divided into four sections which are the flange, track, belt and covers powders which were evaluated by the above techniques to determine the failure of the piece. Metallography analysis in each section of the piece showed different microstructure on gray cast iron; showing that pieces works with different cooling conditions during manufacture, giving a mechanism of failure-prone fragile.

Keywords

FractureCastingMicrostructureOptical MetallographyHardness
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1372: Symposium S3 – Structural and Chemical Characterization of Metal Alloys and Compounds—2011 , 2012 , imrc-1372-s3-13
Copyright
Copyright © Materials Research Society 2012

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References

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