Deformation, recrystallization and plastic anisotropy of asymmetrically rolled aluminum sheets
Deformation, recrystallization and plastic anisotropy of asymmetrically rolled aluminum sheets
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DOI：
10.1016/j.msea.2010.09.023
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发表时间：
2010-11
期刊：
影响因子：
6.4
通讯作者：
J. Sidor;R. Petrov;L. Kestens
中科院分区：
文献类型：
--
作者：
J. Sidor;R. Petrov;L. Kestens
在各种热机械条件下加工的材料表现出不同的塑性各向异性。对汽车用6016铝合金进行了常规轧制和非对称轧制试验。不同的轧制制度通过退火织构对材料的再结晶和塑性行为产生影响。研究了应变路径变化和退火条件对再结晶织构的影响，并利用晶体塑性模型对实验数据进行了模拟。根据实验测得的Lankford值和计算出的极限拉深比分析了塑性各向异性。计算出的非对称轧制板材的极限拉伸比为1.217，与传统生产的最高极限拉伸比为1.209的材料相比，这是一个相当大的改进。
Materials processed under various thermo-mechanical conditions exhibit a different plastic anisotropy. Both conventional and asymmetric rolling processes were applied to a 6016 aluminum alloy for automotive application. A sequence of different rolling schedules bears an effect on the recrystallization and plastic behavior of the material through the annealing texture. The effect of strain path change and annealing conditions on the recrystallization texture is investigated and the experimental data are modeled with the help of crystal plasticity models. The plastic anisotropy is analyzed based on experimentally measured Lankford values and calculated limiting drawing ratios. The calculated limiting drawing ratio of ∼2.17 for asymmetrically rolled sheets represents a considerable improvement as compared to the conventionally produced materials with the highest limiting drawing ratio of ∼2.09.