Iron Based Cellular Structures – Status and Prospects

Stephani, G.; Andersen, Olaf; Göhler, Hartmut; Kostmann, Cris; Kümmel, Kerstin; Quadbeck, Peter; Reinfried, Matthias; Studnitzky, Thomas; Waag, U.

doi:10.1002/adem.200600078

Cited by 48 publications

(26 citation statements)

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“…Investigating the influence of density, cell size and cell shape on the mechanical properties of open cell 6101 aluminum foams, Nieh et al [31] found that, under similar densities, cell size does not have any significant effect on strength while the cell shape had some influences [31]. On the other hand, there have been researchers who found the cell sizes would affect the mechanical properties of the foam or that of a lattice structure [32,33].…”

Section: Effect Of Structural Properties On Elastic and Plastic Comprmentioning

confidence: 99%

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Alavi

Trenggono

Champagne

et al. 2017

Metals

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Biodegradable metal foams have been studied as potential materials for bone scaffolds. Their mechanical properties largely depend on the relative density and micro-structural geometry. In this work, mechanical behavior of iron foams with different cell sizes was investigated under various compression tests in dry and wet conditions and after subjected to degradation in Hanks' solution. Statistical analysis was performed using hypothesis and non-parametric tests. The deformation behavior of the foams under compression was also evaluated. Results show that the mechanical properties of the foams under dry compression tests had a "V-type" variation, which is explained as a function of different geometrical properties by using a simple tabular method. The wet environment did not change the compression behavior of the iron foams significantly while degradation decreased the elastic modulus, yield and compression strengths and the energy absorbability of the specimens. The deformation of open cell iron foams under compression is viewed as a complex phenomenon which could be the product of multiple mechanism such as bending, buckling and torsion.

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Section: Effect Of Structural Properties On Elastic and Plastic Comprmentioning

confidence: 99%

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Alavi

Trenggono

Champagne

et al. 2017

Metals

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“…The walls can be sintered to be fully dense as well as porous [95,96]. MHSs are known to have a good energy absorbing capability [97].…”

Section: Hybrid Wire-woven Metalsmentioning

confidence: 99%

Wire-woven cellular metals: The present and future

Kang

2015

Progress in Materials Science

105

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“…In principle, cellular metals can be manufactured from gas, liquid, or solid phases and currently the most advanced methods involve meltmetallurgical processes. [5] Several groups have produced foam structures by using hollow spheres to form the cells of the material. [6,7] These materials exhibited plateau stresses of 5 and 23 MPa, respectively, with volume specific energy absorptions SEA of 2 and 10 MJ m À3 respectively, up to 50% strain.…”

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confidence: 99%

Novel TRIP‐Steel/Mg‐PSZ Composite–Open Cell Foam Structures for Energy Absorption

et al. 2010

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Composite materials and micro-and macrostructure designs have been the focus of numerous scientific studies over the past few years according to their crashworthiness. [1][2][3] Crashworthiness is concerned with the absorption of energy through controlled failure mechanisms and modes that enable a defined load profile during energy absorption. [4] The specific energy absorption per unit mass, the specific energy absorption per unit volume as well as the interlaminar fracture toughness as a ratio of the fracture toughness parameter to the Young's modulus are expressions in terms of the crashworthiness.Cellular materials, such as metal foams, are materials which display a unique combination of physical and mechanical properties, e.g., for crash box applications. The defining characteristic of metal foams is a very high porosity, typically in the range of 70-90 vol%. In principle, cellular metals can be manufactured from gas, liquid, or solid phases and currently the most advanced methods involve meltmetallurgical processes. [5] Several groups have produced foam structures by using hollow spheres to form the cells of the material. [6,7] These materials exhibited plateau stresses of 5 and 23 MPa, respectively, with volume specific energy absorptions SEA of 2 and 10 MJ m À3 respectively, up to 50% strain. [6,7] Rabiei et al. [8] have presented new crash absorbing foams based on stainless steel hollow spheres packed into a dense arrangement, with the interstitial spaces between the spheres filled with stainless steel powder and final sintering. The compressive strength of this closed-cell stainless steel material was given as 136 MPa at about 40% strain with an energy absorbed of 68 MJ m À3 up to 50% strain. [8] By combining ceramics with ductile metals, failuretolerant metal matrix composites (MMCs) can be created. With regard to application of the MMCs as wear resistant materials in metal forming tools a prolongation of the life time and the resultant reduced equipment downtimes have been achieved by active steel infiltrating of porous zirconia structures with the aid of Ti as activator. [9] A very promising approach concerning zirconia/steel-composite materials with superior mechanical properties has been demonstrated by Guo et al. using a low-alloyed TRIP-steel in combination with an Y-PSZ-ceramic. [10,11] Martensitic transformation in TRIP-steels (TRansformation Induced Plasticity) can improve not only materials strength, but also ductility to a greater degree by the deformation-induced transformation of the metastable austenite to martensite. With the incorporation of up to 20 vol% Y-PSZ in the TRIP-steel matrix Guo et al. COMMUNICATION[*] Prof.Porous materials have received extensive attention for energy absorption in the last years. In terms of this study austenitic TRIP-steel/Mg-PSZ composite-open cell foam structures are formed based on replicas using open-celled polyurethane foam as a skeleton with and without a supporting dense face (jacket) coating. Their compression strength as well as their specific ener...

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Iron Based Cellular Structures – Status and Prospects

Cited by 48 publications

References 1 publication

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Wire-woven cellular metals: The present and future

Novel TRIP‐Steel/Mg‐PSZ Composite–Open Cell Foam Structures for Energy Absorption

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