Abstract The local stress and strain are analyzed in a heterogeneous microstructure induced by compression of aluminium rings under nearly full sticking conditions. This analysis is based on characterization of mechanical behavior and microstructure applying three complementary techniques covering multiple length scales: microhardness, electron microscopy (electron backscatter diffraction) and finite element modelling. The findings are underpinned by applying those techniques in an analysis of a homogeneous microstructure induced by compression of hot-extruded aluminium cylinders. The local stress and strain are estimated at 14 different positions in two rings representing large variations in strain. A comparison with the stress and strain in the homogeneously compressed cylinders related to the average spacing between deformation induced low and high angle boundaries, validates the characterization techniques and supports a hypothesis that the microstructure of local regions in a heterogeneous structure evolve in accordance with universal principles and mechanisms established for the evolution of the deformation microstructure of polycrystalline metals.

中文翻译：

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非均质变形铝的局部应力和应变：显微硬度、电子显微镜和有限元建模的比较分析

摘要 分析了铝环在接近完全粘附条件下压缩引起的异质组织中的局部应力和应变。该分析基于机械行为和微观结构的表征，应用三种互补技术涵盖多个长度尺度：显微硬度、电子显微镜（电子背散射衍射）和有限元建模。通过将这些技术应用于分析由热挤压铝圆柱体压缩引起的均匀微观结构，这些发现得到了支持。局部应力和应变在两个环中的 14 个不同位置估计，代表应变的大变化。