In the present study, the effect of electromagnetic stirring parameters, including stirring time, pouring temperature and stirring frequency, on the morphology of the AM60 alloys was investigated using Taguchi-based grey relational analysis (TGRA). Each parameter of the process was analyzed at three levels. To accommodate all parameters, an orthogonal array L9 based on the Taguchi approach was used. The optimum parameters were chosen, using different microstructural responses such as shape factor, roundness, average grain size, average grain density and average aspect ratio. The optimal processing parameters were found to be 240 s, 30 Hz and 610 °C for stirring time, stirring frequency and pouring temperature, respectively. Results showed that the shape factor, roundness and average grain density were improved by 33%, 12.8% and 5.5%, respectively. Moreover, the average grain size and the aspect ratio decreased compared to those related to the preliminary set of experimental parameters, which represents the refining of the primary α-Mg phases. In addition, optimal experiment shows a dramatic improvement in tensile strength, uniform elongation and hardness compared to the initial conditions. Besides, the overall grey relational grade was compared to an initial set of experimental parameters, showing an improvement of 64%.

在本研究中，使用基于Taguchi的灰色关联分析（TGRA）研究了电磁搅拌参数（包括搅拌时间，浇注温度和搅拌频率）对AM60合金形态的影响。该过程的每个参数都在三个层次上进行了分析。为了适应所有参数，使用了基于Taguchi方法的正交阵列L9。使用不同的微观结构响应（例如形状系数，圆度，平均晶粒尺寸，平均晶粒密度和平均纵横比）选择最佳参数。对于搅拌时间，搅拌频率和浇注温度，最佳工艺参数分别为240 s，30 Hz和610°C。结果表明，形状因子，圆度和平均晶粒密度分别提高了33％，12.8％和5.5％。此外，与初步实验参数集相比，平均晶粒尺寸和长宽比有所降低，这代表了初生α-Mg相的细化。此外，最佳实验表明，与初始条件相比，拉伸强度，均匀伸长率和硬度有了显着提高。此外，将整体灰色关联等级与一组初始实验参数进行了比较，结果显示改善了64％。