The present work deals with the formation and stabilization of the 18R lamellar long-period stacking order phase (LPSO) through friction stir processing of a GWZ magnesium alloy. In this regard, the formation sequence was investigated in detail, where the metastable LPSO structures were formed in the matrix and then transformed into the 18R structure. The involved micro-mechanism is also discussed with emphasis on the formation of a GP-like zone using high-resolution transmission electron microscopy.

中文翻译：

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Mg-Gd-Y-Zn合金的摩擦搅拌工艺形成18R长周期堆积有序相及其稳定性

本工作通过GWZ镁合金的摩擦搅拌工艺处理18R层状长周期堆积有序相（LPSO）的形成和稳定化。在这方面，详细研究了形成顺序，其中亚稳的LPSO结构在基质中形成，然后转化为18R结构。还讨论了所涉及的微观机制，重点是使用高分辨率透射电子显微镜观察了类GP区域的形成。