ABSTRACT

To develop γ″ phase (hexagonal structure with space group $\mathrm{P}\overline{6}2\mathrm{m}$) containing high strength Mg-Gd alloys at lower cost, Mn instead of Ag was added. The state-of-art scanning transmission electron microscopy was applied to characterise γ″ in solution-treated and aged Mg-Gd-Y-Zn-Ni-Mn alloys on the atomic scale. γ″ was not found in the solution-treated state but was captured to precipitate during aging. γ″ with nonuniform occupations of Gd and Y was observed. Different modes of interaction between γ″ and β′ are proposed. The formation of γ″ promoted by Mn was not accidental, suggesting the possibility to form plenty of γ″.

中文翻译：

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通过在Mg-Gd-Y-Zn-Ni-Mn合金中添加Mn来获得γ''相：通过扫描透射电子显微镜观察原子尺度

抽象的

发展γ ''相（具有空间群的六角结构）$\mathrm{P}\overline{6}2\mathrm{米}$）以较低的成本包含高强度的Mg-Gd合金，添加Mn代替Ag。应用了最新的扫描透射电子显微镜，以原子尺度表征了固溶和时效处理的Mg-Gd-Y-Zn-Ni-Mn合金中的γ ”。在溶液处理状态下未发现γ ”，但在老化过程中被捕获而沉淀。观察到Gd和Y占据不均匀的γ ″。提出了γ ″和β ′之间的不同相互作用方式。Mn促进形成的γ ″并非偶然，这表明有可能形成大量的γ ″。