Orientation dependence of the yield stress and work-hardening rate of Ni3Ge at different temperatures

The orientation dependence of the yield stress anomaly of Ni3Ge single crystals with the L12 structure was investigated by compression. The measurements were carried out in the 4.2–1000 K temperature interval for three single crystal orientations, [0 0 1], [ 1 ¯   3   9 ] and [ 2 ¯   3   4 ] . The dislocation structure was studied by transmission electron microscopy. Quantitative measurements of different parameters of the dislocation structure were carried out. The total dislocation density, ρ, was determined for different temperatures at various strains up to sample fracture. The temperature dependencies of the friction stress and the dislocation–dislocation interaction parameter were also obtained.