Value of Young's Modulus for Nickel Wire as Influenced by the Diameter

MAKING use of the electro-magnetic method for measuring the frequency of longitudinal vibrations as described in a previous note1, tests for Young's modulus have been made on pure annealed nickel wires of various diameters in the “as received” condition. The results are shown in the accompanying graph, and it will be seen that for wires of diameter less than about 3/32 in. the value of the modulus rapidly decreases with the diameter.