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Tribological and corrosion properties of Al–12Si produced by selective laser melting

Published online by Cambridge University Press:  08 July 2014

K.G. Prashanth ,
B. Debalina ,
Z. Wang ,
P.F. Gostin ,
A. Gebert ,
M. Calin ,
U. Kühn ,
M. Kamaraj ,
S. Scudino  and
J. Eckert
K.G. Prashanth*
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
B. Debalina
Affiliation:
Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India
Z. Wang
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
P.F. Gostin
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
A. Gebert
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
M. Calin
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
U. Kühn
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
M. Kamaraj
Affiliation:
Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India
S. Scudino
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany
J. Eckert
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Dresden D-01171, Germany; and TU Dresden, Institut für Werkstoffwissenschaft, Dresden D-01062, Germany
*
a)Address all correspondence to this author. e-mail: k.g.prashanth@ifw-dresden.com, kgprashanth@gmail.com
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Abstract

The effect of annealing on the tribological and corrosion properties of Al–12Si samples produced by selective laser melting (SLM) is evaluated via sliding and fretting wear tests and weight loss experiments and compared to the corresponding material processed by conventional casting. Sliding wear shows that the as-prepared SLM material has the least wear rate compared to the cast and heat-treated SLM samples with abrasive wear as the major wear mechanism along with oxidation. Similar trend has also been observed for the fretting wear experiments, where the as-prepared SLM sample displays the minimum wear loss. On the other hand, the acidic corrosion behavior of the as-prepared SLM material as well as of the cast samples is similar and the corrosion rate is accelerated by increasing the heat treatment temperature. This behavior is due to the microstructural changes induced by the heat treatment, where the continuous network of Si characterizing the as-prepared SLM sample transforms to isolated Si particles in the heat-treated SLM specimens. This shows that both the wear and corrosion behaviors are strongly associated with the change in microstructure of the SLM samples due to the heat-treatment process, where the size of the hard Si particles increases, and their density decreases with increasing annealing temperature.

Keywords

additive manufacturingselective laser meltingAl alloyswearfretting wearcorrosion
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 17: Focus Issue: The Materials Science of Additive Manufacturing , 14 September 2014 , pp. 2044 - 2054
Copyright
Copyright © Materials Research Society 2014 

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References

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