Evolution of grain boundary character distributions in a cold-deformed Nickel-based superalloy during electropulsing treatment

• DOI: 10.1016/j.jmrt.2020.03.097
• Publication Date: 2020-04-12T20:14:59Z
• Authors: Hongbin Zhang; Chengcai Zhang; Baokun Han; Jianfeng Qiu; Huiping Li; Shengxue Qin; Jie Liu; Yan Wang; Peng Zhang; Yaokun Pan; Haiping Zhou
• Keywords: Grain boundary strengthening

The evolution of grain boundary character distribution in a cold-deformed nickel-based superalloy during the electropulsing treatment (EPT) was studied. results revealed that both coherent Σ3 boundaries (Σ3c) and incoherent (Σ3ic) were formed recrystallized structures mainly by growth accidents EPT, while fraction Σ3ic became much lower at higher EPT temperatures. Meanwhile, increased with increasing temperatures till 850 °C, decreased again 900 °C. In addition, high mobility could promote formation stacking errors some locations angle (HAGBs), thus promoting nucleation annealing twins. With time, slightly, unstable transformed into stable Σ3c boundaries, which intersecting migrating SRX fronts easier to be extended. On other hand, lot low-Σ CSL pre-deformed alloy strain 0.1 attributed development large grain-clusters. As enough, energy supplied enable cold-rolled effectively utilize stored on boundaries. Besides that, Σ9 Σ27 analyzed detail as well corrosion resistance studied after different treatments.