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Advances in Materials Science and Engineering
Volume 2010, Article ID 269537, 6 pages
http://dx.doi.org/10.1155/2010/269537
Research Article

Cellular Energy Absorbing TRIP-Steel/Mg-PSZ Composite: Honeycomb Structures Fabricated by a New Extrusion Powder Technology

1Institute for Materials Science, Freiberg University of Mining and Technology, Gustav-Zeuner Straße 5, 09596 Freiberg, Germany
2Institute for Materials Engineering, Freiberg University of Mining and Technology, Gustav-Zeuner Straße 5, 09596 Freiberg, Germany
3Institute for Ceramics, Glass and Construction Materials, Agricolastraße 17, Freiberg University of Mining and Technology, 09596 Freiberg, Germany
4Fraunhofer Institute for Ceramic Technologies and Systems, Winterbergstraße 28, 01277 Dresden, Germany

Received 26 March 2010; Revised 20 July 2010; Accepted 30 September 2010

Academic Editor: John W. Gillespie

Copyright © 2010 Ulrich Martin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Lightweight linear cellular composite materials on basis of austenite stainless TRIP- (TRansformation Induced Plasticity-) steel as matrix with reinforcements of MgO partially stabilized zirconia (Mg-PSZ) are described. Two-dimensional cellular materials for structural applications are conventionally produced by sheet expansion or corrugation processes. The presented composites are fabricated by a modified ceramic extrusion powder technology. Characterization of the microstructure in as-received and deformed conditions was carried out by optical and scanning electron microscopy. Magnetic balance measurements and electron backscatter diffraction (EBSD) were used to identify the deformation-induced martensite evolution in the cell wall material. The honeycomb composite samples exhibit an increased strain hardening up to a certain engineering compressive strain and an extraordinary high specific energy absorption per unit mass and unit volume, respectively. Based on improved property-to-weight ratio such linear cellular structures will be of interest as crash absorbers or stiffened core materials for aerospace, railway, or automotive applications.