Microstructural and mechanical studies of feedstock material in continuous extrusion process

IF 3.4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Mechanical and Materials Engineering Pub Date : 2021-09-06 DOI:10.1186/s40712-021-00135-5

Tariku Desta, Devendra Kumar Sinha, Perumalla Janaki Ramulu, Habtamu Beri Tufa

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引用次数: 0

Abstract

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.

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连续挤压工艺中原料材料的微观结构和机械研究

在连续成型工艺中遇到的挑战是成型产品的机械强度随挤压轮速度和产品直径等工艺变量的变化而变化。在这篇研究文章中，在商用连续挤压设备 TBJ350 上，对直径为 9.5 毫米的铝（AA1100）原料在不同挤压轮速度和产品直径下变形前后的微观结构进行了研究。通过中央复合可旋转设计（CCRD）方法，使用两个变量和 3 个级别对屈服强度和伸长率百分比等机械性能进行了估算和优化。通过数学模型预测了获得最大屈服强度和伸长率的最佳工艺参数组合。通过方差分析（ANOVA）验证了数学模型的统计意义。在砂轮速度为 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，而在砂轮速度为 7.06 rpm 和产品直径为 7.18 mm 时，记录的最大伸长百分比为 46.457。这一结果可能有助于获得最佳的砂轮速度和挤压比率参数组合，以获得最佳的产品强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Mechanical and Materials Engineering MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

8.60

自引率

0.00%

发文量

审稿时长

13 weeks