Hastelloy C-276 samples were cold-rolled with their thickness reduction of 7.5% and 15%, and then annealed at 1100 °C for 5–60 min in solid solution. The grain boundary character distributions (GBCDs) were characterized by a technique of electron back scatter diffraction (EBSD). Results indicated that, more convoluted Σ3 boundaries (i.e. incoherent Ʃ3 boundaries) are generated by reasonable annealing time in low strain (7.5%) sample during strain-induced boundary migration (SIBM) processing. They can induce higher Ʃ3ⁿ fraction and activate more interactions between special boundaries for GBE. Instead, more coherent Ʃ3 boundaries were produced by moderate strain (15%) and annealing treatment with the occurrence of static recrystallization (SRX). The recrystallized fine grains possess fewer incoherent Ʃ3 boundaries cannot promote to get more multiple twinning for optimization of GBCD. Therefore, reasonable deformation and annealing treatment parameters lead to more incoherent Ʃ3 boundaries would play an important role in the optimization of GBE.

将Hastelloy C-276样品冷轧，使其厚度分别减小7.5％和15％，然后在1100°C的固溶中退火5-60分钟。晶界特征分布（GBCD）通过电子背散射衍射（EBSD）技术表征。结果表明，在应变诱导边界迁移（SIBM）过程中，低应变（7.5％）样品中的合理退火时间会产生更多回旋的Σ3边界（即非相干Ʃ3边界）。他们可以诱导更高的Ʃ3 ⁿ分割并激活GBE特殊边界之间的更多交互。取而代之的是，通过中等应变（15％）和退火处理以及静态再结晶（SRX）的产生，产生了更连贯的Ʃ3边界。重结晶的细晶粒具有较少的非相干Ʃ3边界，不能促进获得更多的多重孪晶来优化GBCD。因此，合理的变形和退火处理参数会导致更多的非相干Ʃ3边界在GBE的优化中起重要作用。