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Quantitative description of damage evolution in ductile fracture of tantalum

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Abstract

Dynamic ductile fracture has been studied through incipient spallation experiments on two grades of tantalum. A commercially pure Ta material incipiently spalled at 252 m/s, a highly pure Ta material incipiently spalled at 246 m/s, and a highly pure Ta material preshocked at 250 m/s and incipiently spalled at 246 m/s were used. Microstructural parameters of the fracture process such as porosity, void-size distributions, and void aspect ratios have been quantified using image analysis and optical profilometry techniques. The commercially pure Ta, the highly pure Ta preshocked prior to spall, and the annealed high-purity Ta exhibited 27, 16.6, and 5.5 pct porosity, respectively. The void-size distribution observed in all three tests was adequately represented by either a log-normal or a linear combination of a log-normal and a Weibull distribution function. At least 80 pct of the aspect ratios observed in all three tests were adequately represented by a gamma distribution function.

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Authors and Affiliations

  1. the Los Alamos National Laboratory, 87545, Los Alamos, NM

    J. M. Rivas (Postdoctoral Research Associate), A. K. Zurek (Technical Staff Member), W. R. Thissell (Technical Staff Member), D. L. Tonks (Technical Staff Member) & R. S. Hixson (Technical Staff Member)

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  1. J. M. Rivas
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  2. A. K. Zurek
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  3. W. R. Thissell
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  4. D. L. Tonks
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  5. R. S. Hixson
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Additional information

This article is based on a presentation given in the symposium entitled “Dynamic Behavior of Materials - Part II,” held during the 1998 Fall TMS/ASM Meeting and Materials Week, October 11–15, 1998, in Rosemont, Illinois, under the auspices of the TMS Mechanical Metallurgy and the ASM Flow and Fracture Committees.

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Rivas, J.M., Zurek, A.K., Thissell, W.R. et al. Quantitative description of damage evolution in ductile fracture of tantalum. Metall Mater Trans A 31, 845–851 (2000). https://doi.org/10.1007/s11661-000-0028-z

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