Tensile Properties of High-purity Ca Metal

Date
2016-01-01
Authors
Shaw, Austin
Tian, Liang
Russell, Alan
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Ames Laboratory
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Abstract

Recent interest in using calcium (Ca) as a reinforcement metal in Al/Ca metal-metal composites prompted this study of the mechanical properties of high-purity Ca metal. Previously reported measurements of Ca’s mechanical properties were performed on Ca of relatively low purity (~95 at%). Ca used in this study was purified by sublimation to reduce O, N, and C concentrations, yielding 99.95% purity metal for fabrication of tensile test specimens. Yield strength, ultimate tensile strength, ductility, and strain rate sensitivity of high-purity Ca were measured at both 77K and 295K for annealed and cold-worked Ca. Annealed samples were found to be more strain-rate sensitive than as-swaged samples. Both as-annealed and as-swaged Ca samples were stronger and more ductile at 77K than at 295K, behavior that seems to be supported by molecular dynamics simulations of perfect Ca single crystals.

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This article is published as Shaw, Austin, Liang Tian, and Alan Russell. "Tensile Properties of High-purity Ca Metal." British Journal of Applied Science & Technology 15, no. 6 (2016), doi:10.9734/BJAST/2016/26293. Posted with permission.

Keywords
Calcium metal, mechanical properties, strain-rate sensitivity
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