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Microstructural evolution and strengthening mechanisms operating during cryogenic rolling of solutionized Al-Cu-Mg alloy

机译：固溶Al-Cu-Mg合金低温轧制过程中的组织演变和强化机制

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摘要

In this work, microstructural evolution of a solutionized Al-Cu-Mg alloy during rolling at liquid-nitrogen temperature was studied and concomitant strengthening effect was elucidated. It was found that a prior solid-solution treatment as well as a lowering of deformation temperature to the cryogenic range essentially suppressed dislocation mobility. This promoted an abrupt increase of dislocation density but considerably retarded microstructural processes, particularly texture evolution and development of deformation-induced boundaries, thus suppressing grain refinement. Hence, the strengthening effect of the cryogenic rolling was mainly contributed by the work hardening mechanism.
机译：在这项工作中，研究了固溶Al-Cu-Mg合金在液氮温度下轧制过程中的微观组织演变，并阐明了相应的强化效果。已经发现，先前的固溶处理以及将变形温度降低至低温范围基本上抑制了位错迁移率。这促进了位错密度的突然增加，但显着阻碍了微结构过程，特别是纹理演变和形变诱导边界的形成，从而抑制了晶粒细化。因此，深冷轧制的强化效果主要是由加工硬化机制贡献的。

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