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采用离线原位电子背散射衍射技术研究了经10%(厚度减缩量)临界变形量冷轧高纯铝(99.99%)样品在退火过程中的晶粒粗化行为。结果表明,平均晶粒尺寸为40μm的原始晶粒组织经临界变形量冷轧再经480℃退火15 min后,形成了平均晶粒尺寸为200μm的粗晶组织;这种粗晶组织并非由新晶核的广泛长大而形成,而主要是由取向为{611}<106>和{611}<616>原始晶粒的快速长大而导致。
The in-situ electron backscatter diffraction technique was used to study the grain coarsening behavior of cold-rolled high purity aluminum (99.99%) with 10% (thickness reduction) critical deformation during annealing. The results show that the average grain size of 40μm original grain size after the critical deformation of cold-rolled and then annealed at 480 ℃ for 15 min, the formation of coarse grains with an average grain size of 200μm; this coarse grain structure is not new The nuclei grow extensively and form mainly due to the rapid growth of the original grains oriented {611} <106> and {611} <616>.