Experimental results and constitutive modelling for tungsten and tantalum at high strain rates and very high temperatures

Details Experimental results and constitutive modelling for tungsten and tantalum at high strain rates and very high temperatures Experimental results and constitutive modelling for tungsten and tantalum at high strain rates and very high temperatures

2011-05-27

arxiv.org/abs/1105.5514v1

Physics

Condensed Matter

Materials Science

Scientific paper

Recently reported results of the high strain rates, high temperature measurements of the yield stress of tungsten and tantalum have been analyzed. The highest temperature reached in the experiment, based on heating and stressing a thin wire by a fast, high current pulse, was 2520 K and 2720 K, for tantalum and tungsten, respectively. The strain-rates in both the tungsten and tantalum tests were in the range from 500 to 1500 1/s. The parameters for the constitutive equation developed by Zerilli and Armstrong have been determined from the experimental data and the results have been compared with the data obtained at lower temperatures.

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