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应用电子背散射衍射(EBSD)和取向成像显微技术(OIM)研究了形变量对Ni-5 at%W合金退火过程中晶界特征分布(GBCD)的影响。合金经77%、89%和98%冷轧后分别在不同温度下进行退火。试验结果表明:较小的形变量(77%、89%)相比于较高的形变量(98%),前者更容易在随后的再结晶退火过程中激发出更多的低ΣCSL(coincidence site lattice,Σ≤29)特殊晶界。在同一形变量下,随着温度的升高,Σ3的比例随之下降;在相同的退火温度下,随着形变量的增大,Σ3的比例也随之下降。与此同时,小角度晶界含量不断增加,立方织构逐渐尖锐。
The influence of deformation on the grain boundary characteristic distribution (GBCD) during Ni-5 at% W alloy annealing was studied by electron backscatter diffraction (EBSD) and orientation imaging microscopy (OIM). After 77%, 89% and 98% cold-rolled alloys were annealed at different temperatures. The experimental results show that the smaller one (77%, 89%) is more likely to generate more low ΣCSL (coincidence site) during the subsequent recrystallization annealing process than the higher deformation (98% lattice, Σ ≤ 29) special grain boundaries. Under the same deformation, the proportion of Σ3 decreases with the increase of temperature. With the increase of deformation, the proportion of Σ3 decreases with the same annealing temperature. At the same time, the content of small-angle grain boundaries is increasing, and the cubic texture is gradually sharp.