The challenge encountered in continuous forming process is the variation in mechanical strength of product formed with respect to process variables like extrusion wheel speed and diameter of product. In this research article, the micro-structural investigation of the aluminum (AA1100) feedstock material of 9.5-mm diameter has been carried out at various extrusion wheel speeds and diameter of product before and after deformation on commercial continuous extrusion setup TBJ350. The mechanical properties like yield strength as well as percentage elongation have been estimated and optimized using two variables with 3 levels through central composite rotatable design (CCRD) method. The mathematical modeling has been carried out to predict the optimum combination of process parameters for obtaining maximum value of yield strength and percentage elongation. The statistical significance of mathematical model is verified through analysis of variance (ANOVA). The optimum value of yield strength is found to be 70.939 MPa at wheel velocity of 8.63 rpm and product diameter of 9 mm respectively, whereas the maximum percentage elongation recorded is 46.457 at wheel velocity of 7.06 rpm and product diameter of 7.18 mm. The outcome may be useful in obtaining the best parametric combination of wheel speed and extrusion ratio for best strength of the product.

中文翻译：

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连续挤压过程中原料的微观结构和力学研究

连续成型过程中遇到的挑战是所形成产品的机械强度相对于挤出轮速度和产品直径等工艺变量的变化。在这篇研究文章中，对 9.5 毫米直径的铝 (AA1100) 原料进行了微观结构研究，在商业连续挤压装置 TBJ350 上进行了变形前后的各种挤压轮速度和产品直径。通过中心复合材料可旋转设计 (CCRD) 方法，使用具有 3 个水平的两个变量来估计和优化屈服强度和伸长率等机械性能。已进行数学建模以预测工艺参数的最佳组合，以获得屈服强度和伸长率的最大值。通过方差分析（ANOVA）验证数学模型的统计显着性。在车轮速度为 8.63 rpm 和产品直径为 9 mm 时，屈服强度的最佳值分别为 70.939 MPa，而在车轮速度为 7.06 rpm 和产品直径为 7.18 mm 时记录的最大伸长率为 46.457。结果可能有助于获得轮速和挤出比的最佳参数组合，以实现产品的最佳强度。在车轮速度为 8.63 rpm 和产品直径为 9 mm 时分别为 939 MPa，而在车轮速度为 7.06 rpm 和产品直径为 7.18 mm 时记录的最大伸长率为 46.457。结果可能有助于获得轮速和挤出比的最佳参数组合，以实现产品的最佳强度。在车轮速度为 8.63 rpm 和产品直径为 9 mm 时分别为 939 MPa，而在车轮速度为 7.06 rpm 和产品直径为 7.18 mm 时记录的最大伸长率为 46.457。结果可能有助于获得轮速和挤出比的最佳参数组合，以实现产品的最佳强度。