On the origin of the R orientation in the recrystallization textures of aluminum alloys
On the origin of the R orientation in the recrystallization textures of aluminum alloys
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DOI：
10.1007/s11661-999-0088-7
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发表时间：
1999-06
期刊：
影响因子：
--
通讯作者：
O. Engler
中科院分区：
文献类型：
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作者：
O. Engler
大多数铝合金经轧制和再结晶后的晶体学织构由两个组分组成，立方织构{001}<100>和一个类似于轧制织构的组分，即所谓的R取向{124}<211>。在仅通过延长的回复反应（称为连续再结晶）来减少所储存的位错能量的情况下，可以从轧制织构中保留R取向。此外，R-取向的晶粒可以形成通过真正的，不连续的再结晶通过在变形带和随后的生长选择所造成的取向钉扎之间的晶界处的S-取向的晶粒内的成核。再结晶织构中R取向的强度强烈地依赖于材料的预处理和加工参数，特别是依赖于所研究的合金。本文综述了影响R取向的因素，并评述了用局部织构分析方法研究R取向形成机制的最新结果。讨论了在铝合金再结晶织构演化过程中R取向与立方取向的竞争。
The crystallographic textures of most Al alloys, after rolling and recrystallization, are composed of two components, the cube orientation {001}<100> and a component similar to the former rolling texture, the so-calledRorientation {124}<211>. TheRorientation can be retained from the rolling texture in cases where the stored dislocation energy is being reduced merely through extended recovery reactions, which is referred to as continuous recrystallization. In addition,R-oriented grains can form through genuine, discontinuous recrystallization by nucleation withinS-oriented grains at the grain boundaries between the deformed bands and a subsequent growth selection as caused by orientation pinning. The strength of theRorientation in the recrystallization textures strongly depends on the pretreatment and processing parameters of the material and, in particular, on the alloy investigated. The present article gives a survey of the factors affecting theRorientation and reviews recent results on the formation mechanisms of this orientation, which have been obtained by local texture analysis. The results are discussed with regard to the competition of theRorientation with the cube orientation during the evolution of the recrystallization textures in Al alloys.