Orientation dependencies of Young's modulus E and shear modulus G of tempered Cu-strips for spring elements

Orientation dependencies of Young's modulus E and shear modulus G of tempered strips of Cu-Fe2P, CuNi3SiMg and CuCrSiTi for spring elements like connectors were determined by dynamical resonance method in a temperature range from -50 to +200 degreesC. A special mounting of the thin samples was developed. The anisotropy of elastic properties varies in dependence on alloy between 7 and 35% (E) and 47% (G). Annealing reduces the degree of anisotropy. Averaged Slopes DeltaE/DeltaT of -0.047 GPa/K and DeltaG/DeltaT of - 0.0186 GPa/K describe temperaturedependensies of E and G of all orientations with sufficient exactness. The error is less than 1%.