摘要
８０９０Ａｌ－Ｌｉ合金冲击断裂行为的ＳＥＭ研究王轶农，张淑芹，李星逸，孟祥才，廖波（佳木斯工学院）（燕山大学）１前言Ａｌ－Ｌｉ合金与常规Ａｌ合金相比，具有低密度、高比强度和高比刚度等优点，是一种新型航空航天结构材料。但该合金时效态具有较高的沿晶断裂倾...
The impact fracture behavior of 8090 Al-Li alloy in different aging conditions was investigated and analysed combining with microstructure of the alloy by SEM and TEM The results show that the chang of mechanical properties with aging time is attributed to the δ’<Al_3Li) phase particle size :and the precipitation of equilirium phase δ(AlLi)along grain boundaries,and the formation of PFZ,The failure mode is transgranular and intergraular fracture,the former occurs in the as-quenched and underaged conditions,the later occurs in the peakaged and overaged conditions.
