Recrystallization textures and plastic anisotropy in Al-Mg-Si sheet alloys
Recrystallization textures and plastic anisotropy in Al-Mg-Si sheet alloys
复制标题
DOI：
10.4028/www.scientific.net/msf.217-222.479
复制
发表时间：
1996-01-01
期刊：
影响因子：
--
通讯作者：
Hirsch, J
中科院分区：
文献类型：
--
作者：
Engler, O;Hirsch, J
研究了4种不同AA6xxx Al-Mg-Si合金1mm板材的织构、塑性各向异性和力学性能。在最后的冷轧前，对材料进行了不同的热处理，以改变过饱和和析出状态。最终固溶热处理过程中发生的再结晶机制控制了薄板的织构。观察到的织构成分可以解释为立方体取向晶粒和粒子受激形核（PSN）形成的晶粒之间的竞争，同时考虑到不同预退火处理导致的颗粒大小和分布的变化。特别地，发现细小分散的沉淀物的形成强烈地影响了所产生的再结晶织构。对再结晶薄片进行了各向异性性能测试。Lankford参数R可以用经典的Taylor模型来预测。用Tucker模型对主要再结晶织构组分的耳廓行为进行了预测。所产生的耳廓曲线可以通过单个纹理成分引起的特征耳廓效应的叠加来解释。
Textures, plastic anisotropy and mechanical properties of 1 mm sheets from four different AA6xxx Al-Mg-Si alloys were investigated. The materials were exposed to different thermomechanical treatments in order to vary the state of supersaturation and precipitation prior to the final cold rolling. The textures of the sheets were controlled by the recrystallization mechanisms occurring in the final solution heat treatment. The observed texture components could be interpreted on the basis of a competition between the Cube-oriented grains and grains formed by particle stimulated nucleation (PSN) under consideration of the variation in particle size and distribution due to the different pre-annealing treatments. In particular, the formation of finely dispersed precipitates was found to strongly affect the resulting recrystallization textures.For the recrystallized sheets, the anisotropic properties were measured. The Lankford parameter R could be predicted by the classical Taylor model. The earing behaviour was predicted by Tucker's model for the main recrystallization texture components. The resulting earing profiles could be explained by a superposition of the characteristic earing effects caused by the individual texture components.