Mechanical anisotropy and deep drawing behaviour of AZ31 and ZE10 magnesium alloy sheets
Mechanical anisotropy and deep drawing behaviour of AZ31 and ZE10 magnesium alloy sheets
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DOI：
10.1016/j.actamat.2009.09.038
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发表时间：
2010-01-01
期刊：
影响因子：
9.4
通讯作者：
Letzig, Dietmar
中科院分区：
文献类型：
--
作者：
Yi, Sangbong;Bohlen, Jan;Letzig, Dietmar
研究了初始组织对AZ 31和ZE 10两种镁合金板材深冲性能的影响及相应的组织演变。室温拉伸试验表明，AZ 31板材具有较高的塑性应变比r = 2-3，这是由强烈的基型织构引起的。ZE 10片材显示出较低的r值，r类似于1，这是其弱织构的结果。在100-300摄氏度的温度范围内进行的深拉实验表明，ZE 10板可以在比AZ 31板更低的温度下成功地深拉。尽管ZE 10髋臼杯的纹理较弱且正常各向异性较低，但仍显示出凸耳，而AZ 31髋臼杯的凸耳可忽略不计。在ZE 10髋臼杯中，变形主要通过< a >滑移和压缩以及二次孪生来调节。在成功拉深的AZ 31镁合金杯形件中观察到动态再结晶的发生。(C)2009年由Elsevier Ltd.代表Acta Materialia Inc.发布
The influence of the initial microstructure on the deep drawability and the associated microstructural evolution in two different magnesium alloy sheets, AZ31 and ZE10, has been examined, Tensile testing at room temperature shows that the AZ31 sheet has high plastic strain ratios, r = 2-3, which are caused by strong basal-type texture. The ZE10 sheet shows lower r values, r similar to 1, as a result of its weak texture. Deep drawing experiments carried out over the temperature range 100-300 degrees C revealed that the ZE10 sheet can be successfully deep-drawn at lower temperatures than the AZ31 sheet. The ZE10 cups show earing despite the weak texture and low normal anisotropy, while earing of the AZ31 cups is negligible. In the ZE10 cups, deformation is accommodated mainly by < a > slips and by compression as well as secondary twinning. The occurrence of dynamic recrystallization is observed in successfully deep-drawn AZ31 cups. (C) 2009 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.