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Metals 2012, 2(3), 229-237; doi:10.3390/met2030229
Article

Rate Dependence of the Compressive Response of Ti Foams

1,* , 2
, 1
 and 3
Received: 27 April 2012; in revised form: 22 May 2012 / Accepted: 20 June 2012 / Published: 29 June 2012
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Abstract: Titanium foams of relative density ranging from 0.3 to 0.9 were produced by titanium powder sintering procedures and tested in uniaxial compression at strain rates ranging from 0.01 to 2,000 s−1. The material microstructure was examined by X-ray tomography and Scanning Electron Microscopy (SEM) observations. The foams investigated are strain rate sensitive, with both the yield stress and the strain hardening increasing with applied strain rate, and the strain rate sensitivity is more pronounced in foams of lower relative density. Finite element simulations were conducted modelling explicitly the material’s microstructure at the micron level, via a 3D Voronoi tessellation. Low and high strain rate simulations were conducted in order to predict the material’s compressive response, employing both rate-dependant and rate-independent constitutive models. Results from numerical analyses suggest that the primary source of rate sensitivity is represented by the intrinsic sensitivity of the foam’s parent material.
Keywords: titanium foams; FE; Voronoi; X-ray tomography; strain rate titanium foams; FE; Voronoi; X-ray tomography; strain rate
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.

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MDPI and ACS Style

Siegkas, P.; Tagarielli, V.L.; Petrinic, N.; Lefebvre, L.-P. Rate Dependence of the Compressive Response of Ti Foams. Metals 2012, 2, 229-237.

AMA Style

Siegkas P, Tagarielli VL, Petrinic N, Lefebvre L-P. Rate Dependence of the Compressive Response of Ti Foams. Metals. 2012; 2(3):229-237.

Chicago/Turabian Style

Siegkas, Petros; Tagarielli, Vito L.; Petrinic, Nik; Lefebvre, Louis-Philippe. 2012. "Rate Dependence of the Compressive Response of Ti Foams." Metals 2, no. 3: 229-237.


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