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首页> 外文会议>Materials forum - aluminium alloys, their physical and mechanical properties - Volume 28 - 2004 >Effects of Homogenization and Cooling after Extrusion on Microstructure and Ageing Kinetics of Aluminum Alloy 2014
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Effects of Homogenization and Cooling after Extrusion on Microstructure and Ageing Kinetics of Aluminum Alloy 2014

机译：挤压后的均质化和冷却对铝合金组织和时效动力学的影响2014

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摘要

Homogenized billets of alloy 2014 were extruded under different conditions. The changesrnin grain structure and second phase particle distribution that took place during extrusion,rncooling after extrusion and solution treatment, were analyzed by optical microscopy withrnpolarized light (LOM) and by scanning electron microscopy (SEM with EDS). Also, ageingrnresponse at 170℃ was assessed. Results showed that grain structure, as well as ageingrnresponse, are related to the homogenization treatment and conditions of cooling afterrnextrusion. Extrudates produced from billets that were furnace cooled after homogenizationrnhave shown evidence of static recrystallization, even after press-quenching. As arnconsequence, maximum hardness in the T5 and T6 tempers was lower in comparison withrnbars produced from billets that were air cooled after homogenization. These findingsrnemphasize the concept that the effects of thermal history prior to extrusion must be takenrninto account if the final mechanical properties of extruded 2014 alloy are to be optimized.
机译：在不同条件下挤压合金2014的均质坯料。通过光学显微镜用偏光（LOM）和扫描电子显微镜（SEM用EDS）分析了挤压，挤压和固溶处理后的冷却过程中发生的晶粒结构和第二相颗粒分布的变化。此外，评估了170℃下的老化响应。结果表明，晶粒结构以及老化响应与均质化处理和挤压后冷却条件有关。均质后由炉冷却的坯料生产的挤出物即使在压淬后也显示出静态重结晶的迹象。因此，与均质后风冷的坯料生产的棒材相比，T5和T6回火的最大硬度较低。这些发现强调了以下概念：如果要优化挤压2014合金的最终机械性能，必须考虑挤压前的热历史影响。

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