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Thermomechanical behavior of single crystalline tantalum in the static and dynamic regime

Rittel, D. and Silva, M. L. and Poon, B. and Ravichandran, G. (2009) Thermomechanical behavior of single crystalline tantalum in the static and dynamic regime. Mechanics of Materials, 41 (12). pp. 1323-1329. ISSN 0167-6636.

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This paper reports the thermomechanical behavior of single crystalline tantalum (Ta) in the [1 0 0] and [1 1 0] orientations. Mechanical testing was carried out at low and high strain rates using a Kolsky bar together with the simultaneous recording of the specimen’s temperature by means of an infrared detector. The results show a marked difference in terms of flow curve and strain hardening between the two orientations, irrespective of the strain-rate. Similarly, the thermomechanical behavior, namely the efficiency of the thermomechanical conversion at high strain-rates (β_(int)), is observed to be different for each orientation. A comparison of the present results with those obtained for pure polycrystalline Ta (Rittel et al., 2007) reveals some similarity of flow curves with the [1 0 0] orientation. By contrast, the [1 1 0] orientation is observed to possess β_(int) characteristics that are similar to those of the polycrystalline material. These results are presented and discussed, thus completing the overall experimental characterization of this material in order to enable the simulation and validation of the dynamic behavior of polycrystalline Ta on the basis of its single-crystal characteristics.

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Ravichandran, G.0000-0002-2912-0001
Additional Information:© 2009 Elsevier Ltd. Received 20 March 2009; revised 19 July 2009. Available online 8 August 2009. The authors gratefully acknowledge the support of the US Department of Energy through Caltech’s PSAAP Center for the Predictive Modeling and Simulation of High-Energy Density Dynamic Response of Materials.
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US Department of EnergyUNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20091209-092258496
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Official Citation:D. Rittel, M.L. Silva, B. Poon, G. Ravichandran, Thermomechanical behavior of single crystalline tantalum in the static and dynamic regime, Mechanics of Materials, Volume 41, Issue 12, December 2009, Pages 1323-1329, ISSN 0167-6636, DOI: 10.1016/j.mechmat.2009.08.001. (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16914
Deposited By: Tony Diaz
Deposited On:05 Jan 2010 19:22
Last Modified:09 Mar 2020 13:19

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