应用电子背散射衍射(EBSD)和取向成像显微(OIM)技术, 对经过不同形变及热处理的铅合金样品晶界特征分布(GBCD)进行了分析. 研究结果表明: 进行合适的冷轧后在高温(0.9Tm)短时间退火, 可将铅合金的低∑(∑≤29)重位点阵(CSL)晶界比例提高到70%以上. 回复过程中形成∑1晶界的同时, 也出现了∑3晶界, ∑3晶界在再结晶的初期过程中得到发展, 这是提高低 ∑CSL晶界比例的主要原因. 在低 ∑ CSL晶界比例较高时, 从OIM中很容易找到由三条CSL晶界构成的界角, 该界角的三个晶粒之间存在特定的取向关系.
Grain boundary character distributions×(GBCD) in Pb alloy after varying kinds of thermomechanical treatments were analyzed by electron back scatter diffraction (EBSD) and orientation imaging microscopy (OIM). The frequencies of lowΣcoincidence site lattice(CSL) grain boundaries in Pb-alloy can be enhanced to more than 70% after proper cold rolling combined with annealing which was carried out at high temperature（0.9 Tm ）for a very shot period of time. Together withΣ1 boundaries, the Σ3 boundaries appeared during recovering. The development of Σ3 boundaries in the process of recovery and recrystallization is the main reason for enhancing the frequencies of lowΣCSL grain boundaries. Triple junctions which contained three CSL grain boundaries could be easily find in the OIM of the specimen that had high frequencies of lowΣCSL grain boundaries, and there are specific orientation relationships among the grains assembled by the triple junctions
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