Metadislocation arrangements in the complex metallic alloy ξ′-Al–Pd–Mn
Metadislocation arrangements in the complex metallic alloy ξ′-Al–Pd–Mn
复制标题
复合金属合金 xi′-Al-Pd-Mn 中的元位错排列
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
M. Feuerbacher
中科院分区：
文献类型：
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作者：
M. Heggen;M. Feuerbacher
在目前的工作中，研究了不同类型的元位错排列。结果表明，元位错可以形成偶极子或解离成部分，从而导致弹性线能量降低。连接的元位错组可以呈现大型且复杂的网络结构。尽管各个元位错核心处的局部弹性应变仍然很小，但它们具有很大的总伯格斯矢量，并且是高效的塑性变形手段。此外，我们提出了由规则元位错阵列建立的相边界的表征，并表明这些元位错几乎完全补偿了晶格失配。
In the present work different types of metadislocation arrangements are studied. It is shown that metadislocations can form dipoles or dissociate into partials, which leads to a decrease of the elastic line energy. Connected groups of metadislocations can assume large and complex network structures. Although the local elastic strain at the individual metadislocation cores remains small, they posses large total Burgers vectors and are highly effective means of plastic deformation. Furthermore, we present a characterization of phase boundaries built up by regular metadislocation arrays and show that these metadislocations almost fully compensate the lattice mismatch.