运用电子背散射衍射(EBSD)和取向成像显微技术(OIM)研究了退火时间和冷轧变形量对Incoloy 800合金晶界特征分布的影响.结果显示,随着退火时间的延长,总的低∑CSL (coincidence site lattice,∑≤29)晶界比例在60％～70％范围内缓慢增长,∑1晶界比例随∑3晶界比例上升而下降.随着变形量的增加,总的低∑CSL晶界、∑3晶界、∑9晶界和∑27晶界比例均呈现先增加后降低的趋势,而∑1晶界相反,出现先降低后增加的趋势.优化的Incoloy 800合金晶界工程工艺为:在980℃固溶处理15 min,冷轧5％后在980℃退火15 min.
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