Dynamic High-temperature Testing of an Iridium Alloy in Compression at High-strain Rates: Dynamic High-temperature Testing

Song, B.; Nelson, K.; Lipinski, R.; Bignell, J.; Ulrich, G.; George, E. P.

doi:10.1111/str.12100

Dynamic High-temperature Testing of an Iridium Alloy in Compression at High-strain Rates: Dynamic High-temperature Testing

Journal Article · Thu Aug 21 00:00:00 EDT 2014 · Strain

DOI:https://doi.org/10.1111/str.12100· OSTI ID:1122972

Song, B. ^[1]; Nelson, K. ^[2]; Lipinski, R. ^[1]; Bignell, J. ^[1]; Ulrich, G. ^[3]; George, E. P. ^[3]

Sandia National Laboratories, Albuquerque NM 87185 USA
Sandia National Laboratories, Livermore CA 94550 USA
Oak Ridge National Laboratory, Oak Ridge TN 37831 USA

Iridium alloys have superior strength and ductility at elevated temperatures, making them useful as structural materials for certain high-temperature applications. However, experimental data on their high-strain -rate performance are needed for understanding high-speed impacts in severe environments. Kolsky bars (also called split Hopkinson bars) have been extensively employed for high-strain -rate characterization of materials at room temperature, but it has been challenging to adapt them for the measurement of dynamic properties at high temperatures. In our study, we analyzed the difficulties encountered in high-temperature Kolsky bar testing of thin iridium alloy specimens in compression. We made appropriate modifications using the current high-temperature Kolsky bar technique in order to obtain reliable compressive stress–strain response of an iridium alloy at high-strain rates (300–10 000 s^-1) and temperatures (750 and 1030°C). The compressive stress–strain response of the iridium alloy showed significant sensitivity to both strain rate and temperature.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC04-94AL85000; AC05-00OR22725

OSTI ID:: 1122972

Alternate ID(s):: OSTI ID: 1185393

Report Number(s):: SAND--2013-10540J; 491973

Journal Information:: Strain, Journal Name: Strain Journal Issue: 6 Vol. 50; ISSN 0039-2103

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

A New Technique for Conducting Split Hopkinson Tensile Bar Test at Elevated Temperatures Tan, X.; Guo, W.; Gao, X. Experimental Techniques, Vol. 41, Issue 2 https://doi.org/10.1007/s40799-017-0167-4	journal	January 2017
Dynamic High-Temperature Tensile Characterization of an Iridium Alloy with Kolsky Tension Bar Techniques Song, Bo; Nelson, Kevin; Lipinski, Ronald Journal of Dynamic Behavior of Materials, Vol. 1, Issue 3 https://doi.org/10.1007/s40870-015-0022-6	journal	May 2015

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