LY12铝合金的再结晶织构及晶界特征分布

STUDIES ON RECRYSTALLIZATION TEXTURES AND GRAIN BOUNDARV CHARACTER DISTRIBUTION IN LY12 ALUMINUM ALLOY

利用Ｘ射线定量织构分析术和背散射电子衍射花样术，研究了冷轧 ＬＹ１２铝合金的再结晶 织构及重位（ＣＳＬ）晶界的分布，结果表明，高温退火样品的再结晶织构与冷轧样品的织构相似；预回复 低温退火具有增强再结晶立方｛００１｝＜１００＞织构和降低退火Ｓ｛１２３｝＜６３４＞、Ｃ｛１１２｝＜１１１＞及 Ｂ｛１１０｝｝＜１１２＞织构组分的作用；高强度的再结晶立方织构和一定强度的Ｓ织构共存的样品，∑７重 位晶界具有较高的出现频度。

The evolution of recrystallization textures and the CSL grain boundary character distributiion in LY12 alloy annealed at different temperatures for different time have been studied by means of ODF analysis and EBSP (electron back scattering pattern) technique. The results showed that the character of recrystallization texture in the sample annealed at higher temperature is similar to the cold rolling texture. There exists the recrystallization cube texture with high orientation intensity in the sample recovered and then annealed at lower temperature, and the ∑7 grain boundary occurs with high frequency which corresponds to the sharp cube texture component and S texture component.