ABSTRACT In this work, the effects of the dynamic precipitation on the mechanical properties of Al 2024 alloy were investigated under as-received (AR), solution heat treated (SHT), peak aged (PA) and over aged (OA) conditions. The cold, warm and hot deformation were carried out at 25°C, 150°C, 250°C and 350°C for the strain rate of 5.55 × 10−4 s−1. The results indicated that dynamic precipitation takes place and increases the flow stress during warm and hot deformation in the SHT specimens. The most precipitation hardening was observed after testing at 150°C and 250°C for the strain rate of 5.55 × 10−4 s−1.

中文翻译：

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Al 2024 合金在原样、固溶热处理、峰值时效和过时效条件下的冷、温、热变形行为研究

摘要 在这项工作中，研究了在原样 (AR)、固溶热处理 (SHT)、峰值时效 (PA) 和过时效 (OA) 条件下动态析出对 Al 2024 合金力学性能的影响。冷、温、热变形分别在 25°C、150°C、250°C 和 350°C 下进行，应变速率为 5.55 × 10-4 s-1。结果表明，在 SHT 试样的温热变形过程中，发生了动态沉淀并增加了流动应力。在 150°C 和 250°C 下以 5.55 × 10-4 s-1 的应变速率进行测试后，观察到最多的沉淀硬化。