The elastic stiffness coefficients of nickel‐iron single‐crystal alloys at room temperature

摘要

The adiabatic elastic stiffness coefficients of four Ni‐Fe single‐crystal alloys in the composition range from 90 to 50 wt.  of Ni have been determined by the ultrasonic coherent pulse/ continuous wave (cw) technique at room temperature at a frequency of 8 MHZ. The alloying composition influences the three independent elastic constantsC11,C12, andC44of the Cubic crystal. The striking feature is the highly linear dependence of the shear constantsC′ = (C11−C12) andC44on the relative concentration of the constituents.