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Microstructure characteristics and mechanical properties of the interface layer of coated steel insert-aluminum bimetals

Published online by Cambridge University Press:  08 February 2017

Maryam Salimi ,
Medhi Malekan ,
Bahram Nami  and
Hamed Hoseiny
Maryam Salimi
Affiliation:
Department of Mechanical Engineering, Shahid Rajaee Teacher Training University (SRTTU), Tehran 1678815811, Iran
Medhi Malekan*
Affiliation:
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran 1417614418, Iran
Bahram Nami
Affiliation:
Department of Mechanical Engineering, Shahid Rajaee Teacher Training University (SRTTU), Tehran 1678815811, Iran
Hamed Hoseiny
Affiliation:
Corrosion Research Group, Research Institute of Petroleum Industry (RIPI), Tehran 1485733111, Iran
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effect of aluminizing and Cu electroplating of the steel insert in fabrication of Al-matrix bimetal on the microstructure and mechanical properties of the interface layer was investigated. Compound casting process was used to fabricate Al-matrix bimetals reinforced with coated steel insert. The microstructures at the interface region were studied using light optical and scanning electron microscopes and energy dispersive X-ray spectroscopy. The interfacial shear strengths of the fabricated bimetals were compared using push-out test. The results showed that electroplating with copper and aluminizing of steel insert in aluminum matrix led to significant improvement of metallurgical bonding between the steel and aluminum cast matrix. Cu-coated insert contained a thicker and uniform reaction layer formed at the interface between the steel insert and aluminum matrix compared to aluminized coated insert. The results of push-out tests indicated higher interfacial shear strength for the bimetal with Cu-coated insert despite possessing a larger thickness.

Keywords

compound castingbimetalmicrostructureinterfacial shear strengthcopper coatingaluminizing
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 4 , 28 February 2017 , pp. 874 - 882
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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