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

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.

Bioinspired engineering of honeycomb structure – Using nature to inspire human innovation

“…Metal [248,249], reinforced plastic, Nomex paper and composite or hybrid materials [24,250] are the common materials used in making these honeycombs by sandwich construction acted as the basic supporting structure due to its high strength and low density.…”

Reinforcing Mechanism of Mg‐PSZ Particles in Highly‐Alloyed TRIP Steel

“…The use of a metal as matrix material that is reinforced by Mg‐PSZ is quite new, especially in the combination of the austenitic steel showing the transformation induced plasticity (TRIP) effect with the MgO partially stabilized zirconia (Mg‐PSZ) 3–5. In contrast to the poor mechanical properties of the hot pressed composites of Guo et al 4, which showed no plasticity and failed in brittle behaviour, several reports have been published in the last two years that are focussed on this kind of the metal‐matrix composites (MMCs) 6–10. Several TRIP‐steel composites with different content of reinforcing ZrO 2 have been tested and are published elsewhere 9.…”

Mechanical Properties and Corrosion Behaviour of 316l Stainless Steel Honeycomb Cellular Cores Manufactured by Selective Laser Melting

“…Another recent study was performed by Feng et al [37] including the theoretical method and the finite element analysis for predicting mechanical properties of BCC structures and uniaxialreinforced BCCZ and f2BCC structures manufactured by using the SLM technology. Martin et al [38] used a modified ceramic extrusion powder technology and analyzed mechanical properties and energy absorption efficiency of the honeycomb design based on austenitic stainless TRIP-steel and TRIP-steel/zirconia composite (TRIP-MC) materials.…”