Abstract
Tensile Properties of High-purity Ca Metal
Highlights
Calcium is the fifth most abundant element in Earth’s crust
Values for yield strength, ultimate tensile strength, elongation at fracture, and strain rate sensitivity are shown in Tables 1 and 2
The Ca samples tested at 77K had higher ultimate tensile strengths and higher yield strengths than the samples tested at 295K
Summary
Calcium is the fifth most abundant element in Earth’s crust. Ca is an inexpensive, low-density, high-conductivity, ductile FCC metal, but it is not used for structural applications because it reacts with water and has an unusually low elastic modulus (21 GPa). Elongation was found to decrease with lower purity to the point that no elongation was observed for 94-96% pure Ca [3]. These studies were limited to roomtemperature testing, and they did not measure strain-rate sensitivity. The mechanical properties of pure alkaline metals are of renewed interest, due to recent work on Al-Ca and Al-Sr metal-metal nanocomposites for high-voltage electric power transmission [4,5,6,7,8,9,10]. Pure alkaline metal filaments are embedded within an Al matrix to strengthen the conductor while maintaining high electrical and thermal conductivity
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