Achieving ultra-strong Magnesium–lithium alloys by low-strain rotary swaging

Achieving ultra-strong Magnesium–lithium alloys by low-strain rotary swaging
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通过低应变旋锻实现超强镁锂合金

DOI:
10.1080/21663831.2021.1891150
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发表时间:
2021-06
影响因子:
8.3
通讯作者:
Yonghao Zhao
Yonghao Zhao
中科院分区:
材料科学2区
文献类型:
--
作者:
Yue Yang;Xiang Chen;Jinfeng Nie;Kang Wei;Qingzhong Mao;Fenghua Lu;Yonghao Zhao

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强塑性变形(SPD)是金属和合金强化的有效手段,其变形应变明显大于1。然而,由于镁合金的变形能力较低,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合金低应变变形强化方案,即在粗晶内部引入块状孪晶和层错。利用该方案,我们成功地制备了具有新的强度记录的超轻块体镁锂合金。本文探索了一种金属及合金低变形应变强化的新途径,并用低应变回转锻造工艺成功制备了强度最高的超轻镁锂合金。
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. GRAPHICAL ABSTRACT IMPACT STATEMENT This paper explored a new strengthening way of low deformation strain for metals and alloys and successfully prepared a strongest ultra-light Mg–Li alloy by low-strain rotary swaging process.
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