Abstract The recrystallization behaviour of Al-Mn alloys (AA3xxx series alloys) is affected by randomly distributed dispersoids present before annealing, by dispersoids precipitated at grain/subgrain boundaries before the onset of recrystallization, and by dispersoids concurrently precipitated during recrystallization. In this study, the effects of these three populations of dispersoids on the recrystallization behaviour of a cold rolled AA3xxx alloy were analysed and compared using four temperature-time paths to different target temperatures. Changing the temperature-time path modifies the extent of recovery, the dispersoid structures, as well as the absolute recrystallization temperature, which then influences the final grain structure and recrystallization texture. In particular, an in-depth investigation on how different populations of dispersoids affect the main recrystallization texture components of AA3xxx alloys, i.e., P{011}〈566〉, ND-Cube {001}〈310〉, and Cube {001}〈100〉, has been carried out. The results clearly show that, as compared to isothermal annealing, annealing with more elaborate heating and annealing schedules (temperature-time paths) all lead to increased strength of the P texture component and decreased intensities of both the Cube and ND-rotated Cube texture components. The increase of P texture strength and average grain size is most significant when recrystallization occurs concurrently with precipitation. The controlling mechanisms behind this behaviour and the possibility to use them to tailor the grain structure and texture of similar alloys are further discussed.

中文翻译：

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从析出和再结晶的竞争控制Al-Mn中的晶粒结构和织构

摘要 Al-Mn 合金（AA3xxx 系列合金）的再结晶行为受退火前存在的随机分布的弥散体、再结晶开始前在晶粒/亚晶界析出的弥散体以及再结晶过程中同时析出的弥散体的影响。在这项研究中，使用四种温度-时间路径对不同目标温度的这三种弥散体群对冷轧 AA3xxx 合金再结晶行为的影响进行了分析和比较。改变温度-时间路径会改变恢复程度、弥散结构以及绝对再结晶温度，进而影响最终晶粒结构和再结晶织构。特别是，深入研究不同的弥散体群体如何影响 AA3xxx 合金的主要再结晶织构成分，即 P{011}<566>、ND-Cube {001}<310> 和 Cube {001}<100>，已经执行。结果清楚地表明，与等温退火相比，采用更精细的加热和退火计划（温度-时间路径）进行的退火都会导致 P 纹理分量的强度增加，并降低 Cube 和 ND 旋转的 Cube 纹理分量的强度. 当再结晶与析出同时发生时，P 织构强度和平均晶粒尺寸的增加最为显着。进一步讨论了这种行为背后的控制机制以及使用它们来定制类似合金的晶粒结构和织构的可能性。