计算机模拟Al-Cu-(Mg)-(Ag)时效初期原子分布状态
来源期刊：中南大学学报(自然科学版)2000年第5期
论文作者：李世晨 郑子樵
文章页码：441 - 444
关键词：Monte Carlo方法;原子簇;丛聚; Al-Cu-(Mg)-(Ag);弹性应变
Key words：Monte Carlo method; atomic cluster; clustering; Al-Cu-(Mg)-(Ag); elastic strain
摘 要：采用Monte Carlo方法模拟了时效初期Al-1.8Cu,Al-1.8Cu-0.2Ag,Al-1.8Cu-0.5Mg和Al-1.8Cu-0.5Mg-0.2Ag 4种合金的原子分布图.结果表明:在无Mg,Ag的Al-Cu合金时效时,Cu原子有强烈丛聚的倾向,而微量Mg,Ag的加入明显抑制了Cu原子的丛聚,其中,尤以Mg的作用最为显著,并且Mg,Ag之间还存在强烈的相互作用.作者认为,微量Mg,Ag对Al-Cu合金时效过程的影响是通过抑制Cu原子丛聚而实现的.
Abstract: The Monte Carlo method is applied to simulating the distribution of solutes in the alloys:Al-1.8Cu, Al-1.8Cu-0.5Mg, Al-1.8Cu-0.2Ag, Al-1.8Cu-0.2Mg-0.2Ag. The simulation result shows that the Cu atoms in Al-1.8Cu alloys are apt to clustering; with the effect of trace Mg and Ag, the Cu clustering is restrained; the trace of Mg plays the major role of restraining the Cu atom clustering, and the strongly interaction between Mg and Ag is found. And then,we analyze the effect of elastic strain on the simulation result. We think that by restraining the Cu atoms clustering, which relax the elastic strain, the trace of Mg and Ag changes the Al-Cu aging process.
