| Abstract Scope |
B2 intermetallic CuDy and CuY alloys exhibit unique mechanical properties and deformation mechanisms. The DyY phase diagram shows complete solubility that enables ternary B2 alloying. This class of materials is hypothesized to exhibit unique mechanical behaviors similar to binary systems, but B2 Medium Entropy Alloys have yet to be realized. To explore this, two CuDyY ternary alloys and reference CuDy and CuY binary compositions were fabricated and characterized. Mechanical characterization revealed hardness values of ~3 GPa for the ternary systems from nanoindentation. To probe bulk response, compression testing was conducted. Cu₅₀Dy₂₅Y₂₅ exhibited notable ductility comparable to binary alloys, whereas Cu₃₃Dy₃₃Y₃₃ demonstrated high strength at the expense of reduced ductility. Tuning the composition of the CuDyY ternary system impacts strength and ductility, enabling tailored property tradeoffs for structural applications. |