The effect retrogression and re-aging (RRA treatment) on the tensile properties in the transverse direction of extruded rods from aluminum alloy AA7049 is investigated. Transmission electron microscopy is used to study the structure and the phase transformations occurring in the alloy under the RRAtreatment. The conductivity of the alloy is measured in different conditions. It is shown that the RRA elevates the strength and the ductility in the transverse direction of rods from alloy AA7049 as compared to conventional aging.

中文翻译：

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回归和再时效对AA7049铝合金挤压棒材横向拉伸力学性能的影响

研究了退化和再时效（RRA 处理）对 AA7049 铝合金挤压棒材横向拉伸性能的影响。透射电子显微镜用于研究在 RRA 处理下合金中发生的结构和相变。在不同条件下测量合金的电导率。结果表明，与常规时效相比，RRA 提高了 AA7049 合金棒材在横向上的强度和延展性。