In this study, optimization of equal channel angular pressing (ECAP) parameters was aimed to improve the mechanical and microstructure properties of Al–Zn–Mg alloy using the Taguchi method with ANOVA analysis. Three different parameters (process temperature, processing route, and the number of passes) with three different levels were examined so L₉ (3³) orthogonal array was employed. The effects of these parameters on the microstructure properties of Al–Zn–Mg alloy were studied using X-ray diffractometer, optical microscopy, scanning electron microscopy, electron backscatter diffraction and transmission electron microscopy and mechanical properties were measured by Vickers micro-hardness experimental tests. Among the samples obtained, the sample that meets the desired hardness and grain size value was characterized. The results indicate that eight pass ECAP in route B_c at 100 °C is found as a more appropriate condition that meets the highest micro-hardness value and the lowest grain size value. Microstructural investigations showed that grain size was highly affected by the temperature, and is less affected by the number of passes and ECAP routes. The results showed that the increasing ECAP temperature leads to a decrease in the fraction of HABs, an increase in the grain size and an increase in the equiaxed of the grains.

在这项研究中，优化等通道转角挤压（ECAP）参数的目的是使用Taguchi方法结合ANOVA分析来改善Al-Zn-Mg合金的力学性能和显微组织性能。检查了三个不同级别的三个不同参数（过程温度，过程路线和通过次数），因此L ₉（3 ³使用正交阵列。使用X射线衍射仪，光学显微镜，扫描电子显微镜，电子背散射衍射和透射电子显微镜研究了这些参数对Al-Zn-Mg合金显微组织性能的影响，并通过维氏显微硬度试验测试了力学性能。 。在获得的样品中，表征满足所需硬度和粒度值的样品。结果表明，路线B _c八通ECAP发现在100°C下满足最高显微硬度值和最低晶粒尺寸值的更合适条件。显微组织研究表明，晶粒尺寸受温度的影响很大，而通过次数和ECAP路线的影响较小。结果表明，升高的ECAP温度导致HAB分数降低，晶粒尺寸增大和晶粒等轴线增大。