Microstructure and micro-texture evolution during the dynamic recrystallisation of a Ni-30Fe-Nb-C model alloy

摘要: Abstract The evolution of microstructure and micro-texture during discontinuous dynamic recrystallisation an austenitic Ni-30Fe-Nb-C model alloy subjected to interrupted plane strain compression at strains (e) 0.23, 0.35, 0.68, 0.85 1.2 was investigated using electron backscattering diffraction transmission microscopy. Throughout the range, majority events comprised nucleation in necklace-like arrangements located along grain boundaries via bulging. At e ≥ 0.68, discrete were also observed within interiors. Grain growth is characteristic induced boundary migration. initial texture Cube-RD ({013}〈100〉), Cube-ND ({001}〈310〉) Cube ({001}〈100〉) orientations. Up e ≤ 0.35, unrecrystallised fractions Brass ({110}〈112〉) or Copper ({112}〈111〉) orientations intensity spread near Rotated Goss ({011}〈011〉). Between 0.68 ≤ e ≤ 1.2, similar that recrystallised grains throughout range; both which are dominated by orientation. dominance orientation secondary deformed can be ascribed its low stored energy stability.