Dynamic Behavior of Melt-Foamed Aluminum under Compressive and Tensile Loads

  1. B. Jouffrey
  1. Thorsten Böllinghaus,
  2. Heiko von Hagen and
  3. Wolfgang Bleck

Published Online: 9 MAY 2006

DOI: 10.1002/3527606165.ch13

Microstructural Investigation and Analysis, Volume 4

Microstructural Investigation and Analysis, Volume 4

How to Cite

Böllinghaus, T., von Hagen, H. and Bleck, W. (2000) Dynamic Behavior of Melt-Foamed Aluminum under Compressive and Tensile Loads, in Microstructural Investigation and Analysis, Volume 4 (ed B. Jouffrey), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606165.ch13

Author Information

  1. Department of Ferrous Metallurgy (IEHK), RWTH Aachen, University of Technology, Germany

Publication History

  1. Published Online: 9 MAY 2006
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301218

Online ISBN: 9783527606160

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Keywords:

  • microstructural investigation;
  • metal matrix composites;
  • melt-foamed aluminum;
  • dynamic behavior;
  • compressive and tensile loads

Summary

Metal foams have recently evoked special interest as a new material with interesting properties. For structural applications materials have to provide mechanical properties that are of great reliability to the user. Therefore the most suitable material parameters have to be determined for today's foams by material testing and evaluation. Data on the mechanical properties under static loads already exist, but for construction purposes, especially in automotive construction, it is extremely important to obtain information about the dynamic behavior. One of the most important dynamic properties is the cyclic behavior of aluminum foam. At the IEHK the testing procedures according to DIN standards have been established for the static testing of metal foams and sandwich materials (steel facesheets and an aluminum foam core) and have been applied to fatigue testing. The samples of the dimensions 50 × 50 × 20 mm3 were tested under compressive and tensile loads with a frequency of 40 Hz up to 107 cycles. Under tension failure occurs by fracture. Under compression a failure criterion was assumed with a maximum strain of 4 %. The testing was done on homogeneous samples of a melt-foamed aluminum (“Alporas”) using material of three densities (0,22, 0,25 and 0,30 g/cm3). The resulting data is presented in S-N curves for each density. Another important dynamic property is the compression behavior at high strain rates. Samples with the same dimensions as for fatigue testing were crushed with strain rates from quasistatic up to 100/s at room temperature.