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Steel-Magnesium Laminated Composites by Infiltration

Published online by Cambridge University Press:  14 February 2012

Arda Çetin ,
Jérôme Krebs ,
Alexandre Durussel ,
Andreas Rossoll ,
Junya Inoue ,
Shoichi Nambu ,
Toshihiko Koseki  and
Andreas Mortensen
Arda Çetin
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory for Mechanical Metallurgy, CH-1015 Lausanne, Switzerland
Jérôme Krebs
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory for Mechanical Metallurgy, CH-1015 Lausanne, Switzerland
Alexandre Durussel
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory for Mechanical Metallurgy, CH-1015 Lausanne, Switzerland Department of Materials Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Andreas Rossoll
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory for Mechanical Metallurgy, CH-1015 Lausanne, Switzerland
Junya Inoue
Affiliation:
Department of Materials Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Shoichi Nambu
Affiliation:
Department of Materials Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Toshihiko Koseki
Affiliation:
Department of Materials Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Andreas Mortensen
Affiliation:
Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory for Mechanical Metallurgy, CH-1015 Lausanne, Switzerland
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Abstract

Steel–magnesium alloy laminated composites can be produced by gas-driven pressure infiltration of a molten magnesium alloy between layers of stacked steel sheets followed by directional solidification of the infiltrated magnesium alloy. A key step in the process is ensuring adequate separation and alignment of the steel sheets during the process; this is achieved by introducing small dimples in the steel sheets to hold them apart during infiltration. Advantages of the process are its speed, the defect-free composites it produces, and the fact that, unlike roll-bonded composites, the steel in the composite is in an annealed condition. The ultimate tensile strength of the as-cast laminates, of 260 MPa, obeys the rule of mixtures. The uniform tensile elongation, of around 20%, makes the infiltrated laminates nearly as ductile as the bulk steel it contains, implying that the magnesium alloy in the as-cast laminates has a substantially increased tensile ductility in comparison to the bulk state in a metallurgically equivalent condition.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1373: Symposium S4 – Advanced Structural Materials—2011 , 2012 , imrc-1373-s4-23
Copyright
Copyright © Materials Research Society 2012

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References

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