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Abstract：
In the present study, the effects of varying heating and cooling rates during the solution treatment process on the microstructure and properties of AA7050 alloy wires were investigated using tensile tests, metallographic microscopy, electron backscattered diffraction, and transmission electron microscopy. It was found that the recrystallized grain size of the alloy, subjected to method of rapid heating, exhibited a smaller and more uniform distribution in comparison to method of slow heating. The low density of η\' strengthening phases after the artificial aging treatment was formed using air cooling method. Meanwhile, by using the water quenching method sufficient solute atoms and more nucleation sites were provided resulting in a large number of η\' strengthening phases being formed. In addition, the alloy processed using the water quenching method displayed higher strength than that treated using the air cooling method for the T6 and T73 states. Furthermore, coarse precipitates formed and less clusters were observed in the matrix, while high density nanoscale clusters and no continuous precipitation are formed when using the water quenching method.
摘要：
在本研究中,利用拉伸试验研究了固溶处理过程中不同的加热和冷却速率对AA7050合金线材组织和性能的影响,金相显微镜,电子背散射衍射，和透射电子显微镜。发现合金的再结晶晶粒尺寸，经受快速加热的方法，与缓慢加热的方法相比，表现出更小，更均匀的分布。人工时效处理后的低密度η'强化相采用空气冷却法形成。同时,通过使用水淬方法，提供了足够的溶质原子和更多的成核位点，从而形成了大量的η\'强化相。此外,对于T6和T73状态，使用水淬火方法处理的合金显示出比使用空气冷却方法处理的合金更高的强度。此外，在基质中形成了粗糙的沉淀物，观察到了较少的团簇，而使用水淬方法时，不会形成高密度的纳米级团簇和连续沉淀。
