Severe plastic deformation (SPD) with deformation strain significantly larger than one is effective to strengthen metals and alloys. However, such a method will not work for Mg alloys due to their low deformability. In view of this problem, we propose a new alloy strengthening scheme of low-strain deformation, which is to introduce massive twins and stacking faults in coarse grain interior by rotary swaging (RS) at room temperature. By using this scheme, we successfully prepared an ultra-light bulk Mg-Li alloy with new strength record.

中文翻译：

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通过低应变旋转型锻获得超强镁锂合金

严重的塑性变形（SPD），其变形应变明显大于1，可以有效地增强金属和合金的强度。然而，由于其低的可变形性，这种方法不适用于镁合金。针对这一问题，我们提出了一种新的低应变变形合金强化方案，即在室温下通过旋转型锻（RS）在粗晶粒内部引入大量孪晶和堆垛层错。通过使用该方案，我们成功地制备了具有新强度记录的超轻质Mg-Li合金。