DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 717 - 723
Section Industrial Applications
Published online 15 September 2009
DYMAT 2009 (2009) 717-723
DOI: 10.1051/dymat/2009101

Nano nickel strengthened open cell metal foams under quasistatic and dynamic loading

A. Jung1, H. Natter1, R. Hempelmann1 and E. Lach2

1  Saarland University, Physical Chemistry, 66123 Saarbruecken, Germany
2  French-German Research Institute of Saint-Louis (ISL), 68301 Saint-Louis, France

Published online: 15 September 2009

Metal foams are a relatively new class of materials which shows interesting behavior in the field of energy absorption. The mechanical behaviour of open cell aluminium foams with coatings of different metals have been investigated under quasi-static and dynamic compression loading in order to enhance the energy absorption capability. Nanocrystalline nickel offered the best performance for the purpose of enhanced energy dissipation during compressive loading under the investigated coating metals. The effect of coating thickness and pore size was studied by slow and fast quasi-static compression tests and as well as by dynamic compression tests with a split-Hopkinson-pressure-bar (SHPB). There was a linear increase in energy absorption capability with coating thickness for the absolute values and per foam thickness but per density or mass the energy absorption capability reached a saturation point. So there is an optimum in coating thickness.
Under dynamic loading there was also an increase in energy absorption capability by a factor of 10 for a coating thickness of 50 μm in comparison to uncoated foams even at a very small foam thickness of 4 mm.

© EDP Sciences 2009