Strengthening and toughening of magnesium alloy by {10-12} extension twins
Strengthening and toughening of magnesium alloy by {10-12} extension twins
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{10-12}延伸孪晶对镁合金的强韧化
DOI：
10.1016/j.scriptamat.2011.09.033
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发表时间：
2012-01-01
影响因子：
6
通讯作者：
Liu, Qing
中科院分区：
文献类型：
--
作者：
Xin, Yunchang;Wang, Maoyin;Liu, Qing
本文研究了{10 ~ 12}扩展孪晶在应变径改变再压缩过程中对热轧AZ31镁合金的强化增韧机理。在有利取向下，沿轧制方向预压缩产生的{10-12}孪晶可发生{10-12}扩展孪晶。延伸孪晶的细化显著提高了横向再加载的屈服应力和峰值应力，但伸长率没有下降，其效果与预应变水平密切相关。(C) 2011材料学报Elsevier Ltd.出版。版权所有。
The mechanisms of strengthening and toughening of hot-rolled AZ31 magnesium alloy by {10 - 12} extension twins during strain path changed recompression are studied in the current paper. Under the favorable orientation, {10 - 12} extension twinning can occur in {10-12} twins generated by precompression along the rolling direction. Grain refinement by extension twins dramatically enhances both yield stress and peak stress of reloading along the transverse direction without any degradation in elongation, while the effect is closely related with the level of prestrain. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.