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Heterogeneous Precipitation in 1424 Al–Mg–Li Alloy

机译：1424 Al-Mg-Li合金中的异质沉淀

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Heterogeneous precipitation on grain and subgrain boundaries of 1424 alloy sheets has been studied within the present work. The presence of different phase structural precipitations is typical for the grain and subgrain boundaries in addition to equilibrium S1 (Al2LiMg) phase. In particular, ranges, containing superfine grains are revealed. Formation of these structures is determined by the electron-structural state of lithium atom in Al-Li alloys. There are three of those states. These are substitutional atoms, having a covalent bond with close aluminium atom – covalent lithium; substitutional atoms as Li+ ion – metallic lithium and interstitial atoms as Li+ ion – interstitial lithium. The phase composition and structure of heterogeneous precipitations depends on the deformation and heat treatment regimes. Taking into a consideration all the three states of lithium atoms mechanism of those structures formation has been considered.
机译：在本作工作中已经研究了1424个合金纸张的晶粒和粒子边界的异质沉淀。除了平衡S1（Al2Limg）相之外，谷物和子质界的典型存在不同相位结构沉淀的存在。特别地，揭示了含有超细晶粒的范围。这些结构的形成由Al-Li合金中的锂原子的电子结构状态决定。这些国家中有三个。这些是具有近铝原子 - 共价锂的共价键;作为Li +离子 - 金属锂和间质原子作为Li +离子间质锂的替代原子。异质沉淀的相组成和结构取决于变形和热处理制度。考虑到这些结构形成的所有三种锂原子机制的所有三种状态。

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