Computer Simulation of Ordering and Atom Clustering in Aging Binary Al-Li Alloy
来源期刊：材料热处理学报2004年第5期
论文作者：HU Ming-juan LI Xiao-ling
关键词：computer simulation; ordering; atom clustering; Al-Li alloy;
摘 要：Ordering and atom clustering in aging binary Al-Li alloy has been investigated by computer simulation through calculating the long range order (lro.) parameter and composition deviation order parameter from single-site occupation probabilities of Li atom. The results show that when the alloy lies in metastable region in the phase diagram ordering and atom clustering occur simultaneously. As the composition of the alloy increases ordering occurs earlier than atom clustering gradually. When the alloy lies in instable region atom clustering takes place after the congruent ordering completes. It has also been found that the incubation period of the phase transformation is shortened as the composition increases.
WANG Yong-xin1，HU Ming-juan2，LI Xiao-ling2，CHEN Zheng1
(1.Department of Material Science and Engineering, Northwestern Polytechnical University, Xi'an, China;
2.Department of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai, China)
摘要:Ordering and atom clustering in aging binary Al-Li alloy has been investigated by computer simulation through calculating the long range order (lro.) parameter and composition deviation order parameter from single-site occupation probabilities of Li atom. The results show that when the alloy lies in metastable region in the phase diagram ordering and atom clustering occur simultaneously. As the composition of the alloy increases ordering occurs earlier than atom clustering gradually. When the alloy lies in instable region atom clustering takes place after the congruent ordering completes. It has also been found that the incubation period of the phase transformation is shortened as the composition increases.
关键词:computer simulation; ordering; atom clustering; Al-Li alloy;
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