Abstract
In this paper, we present results from a series of elevated temperature combined pressure-and-shear plate impact (PSPI) experiments conducted on polycrystalline commercial purity aluminum (99.999%) and magnesium (99.9%) samples at temperatures ranging from 23 °C to 320 °C. These experiments are designed to study the effect of temperature on flow stress of fcc and hcp metals at ultra-high shear strain rates (greater than 105/s) and high shear strains (approaching 50%). In order to conduct this research, the single-stage gas-gun facility at Case Western Reserve University was modified to include a breech-end sabot heater system and a fully fiber-optics based combined NDI/TDI interferometer. The flow stress of commercial purity aluminum and magnesium, as inferred from the transverse particle velocity record measured at the free surface of a fully elastic Tungsten Carbide (WC) target plate reveal that both sample materials soften when heated to temperatures approximately 50% of their melt temperatures.
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Acknowledgments
The authors would like to acknowledge the financial support of the U.S. Department of Energy through the Stewardship Science Academic Alliance (DE-NA0001989 and DE-NA0002919).
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Zuanetti, B., Wang, T., Prakash, V. (2020). Combined Compression and Shear Impact Response of Polycrystalline Metals at Elevated Temperatures. In: Lamberson, L. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-30021-0_27
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DOI: https://doi.org/10.1007/978-3-030-30021-0_27
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