The elastic constants of FCC Ni–Ga and Ni–Ge alloys up to 1100 K

The elastic constants, Cij, of monocrystalline Ni–12.16Ga and Ni–11.59Ge (at.%) were measured to 1100 K. C44 is roughly equal for both solid solutions and Ni3Ga and Ni3Ge. Otherwise, Ni3Ga is elastically softer, while Ni3Ge is elastically harder above 900 K. Implications of this latter comparison are discussed.