Studies on Magnesium Alloys with Long Period Stacking Ordered Phase

为了开发新型轻质、高强、高耐热镁合金，我们开展了长周期有序堆积相镁合金的基础和高级研究工作。由于LPSO相抑制了孪晶变形，使含LPSO相的镁合金具有较高的强度和合理的塑性等优异的力学性能。此外，在塑性变形过程中，扭结变形发生在LPSO相中。在本研究中，我们阐明了通过引入扭结变形带来强化合金，并给出了形成LPSO相的合金元素的判据。

In order to develop novel lightweight high strength and highly heat-resistant magnesium alloys, we have performed fundamental and advanced research for long-period stacking ordered (LPSO) structure phase-containing Mg alloys. The LPSO phase-containing Mg alloy exhibits excellent mechanical properties such as high strength and reasonable ductility because LPSO phase suppresses a twin deformation. Furthermore, kink deformation occurs in the LPSO phase during plastic deformation. In this study, we have clarified the alloy strengthening by introduction of kink deformation band, and exhibited the criteria of alloy elements for formation of LPSO phase.