摘要
Different densities and configurations of crystal defects were obtained in anaustenitic Fe-30 percent Ni alloy and an ultra low carbon bainitic (ULCB) alloy by undergoingdifferent deformations and annealing treatments at high temperatures. Boron segregation on grainboundaries and subgrain boundaries during air-cooling were revealed by means of the particletracking autoradiography technique. It is found that non-equilibrium segregation is resisted indeformed grains after recovery and polygonization, boron-depleted zones seem to be quite clear inrecrystallized grains than those in deformed original grains during cooling. Subgrain boundaries andpolygonized dislocation cells have a significant effect on non-equilibrium boron segregation duringthe air-cooling. The results implicates that dislocation configuration is a more important factoraffecting boron segregation at grain boundaries rather that the density of defects itself in thegrain.
Different densities and configurations of crystal defects were obtained in anaustenitic Fe-30 percent Ni alloy and an ultra low carbon bainitic (ULCB) alloy by undergoingdifferent deformations and annealing treatments at high temperatures. Boron segregation on grainboundaries and subgrain boundaries during air-cooling were revealed by means of the particletracking autoradiography technique. It is found that non-equilibrium segregation is resisted indeformed grains after recovery and polygonization, boron-depleted zones seem to be quite clear inrecrystallized grains than those in deformed original grains during cooling. Subgrain boundaries andpolygonized dislocation cells have a significant effect on non-equilibrium boron segregation duringthe air-cooling. The results implicates that dislocation configuration is a more important factoraffecting boron segregation at grain boundaries rather that the density of defects itself in thegrain.
基金
This work was financially supported by the National Natural Science Foundation of China(No.59291000).
