铝锂合金中原子簇聚和有序化的计算机模拟研究(英文)

Investigations on Ordering and Atom Clustering in Al-Li Alloy by Computer Simulation

通过计算机模拟对铝锂合金时效过程中的有序化和原子簇聚进行了研究。长程序参数和成分偏离序参数通过锂原子格点占位几率计算得出。结果表明:随合金成分由相图上的亚稳区向失稳区转变,有序化与原子簇聚过程相比逐渐加快,而相变孕育期逐渐缩短。

Investigations on the ordering and atom clustering in aged binary Al-Li alloy have been carried out by computer simulation. The long range order parameter （1ro.） and composition deviation order parameter were calculated from single-site occupation probabilities of Li atom. The results show that as the composition of the alloy increases from metastable region to instable region in the phase diagram ordering occurs faster than atom clustering gradually and the incubation period of the phase transformation is shortened.