Effect of Tool Design on the Mechanical Properties of Bobbin Friction Stir Welded High-Density Polyethylene Sheets: Experimental Study

IF 0.8 Q3 ENGINEERING, MULTIDISCIPLINARY

International Journal of Engineering Research in Africa Pub Date : 2022-07-25 DOI:10.4028/p-8c4i2j

Djilali Bouha, Habib Khellafi, El Bahri Ould Chikh, H. Meddah, Abdellah Kaou

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引用次数: 1

Abstract

Welding polymers by the friction stir welding (FSW) technique is one assembly process among several known assembly techniques which consists in welding two materials without filler material. The FSW process is based on the generation of heat due to friction and material deformation under an axial force. Among the main aspects affecting material flow, the choice of welding tool geometry has become of great interest to improve the welds quality. The main objective of this work is the welding of polymers using the FSW technique. A new method of welding HDPE (high density polyethylene) plates, called BT-FSW (bobbin tool friction stir welding) was developed. Standard rectangular shape intended for the distribution of natural gas has been successfully welded by BT-FSW. Tensile tests and hardness measurements were carried out on samples cut from the welded sheets and the results were analyzed to compare the mechanical characteristics of the plates welded by the BT-FSW and conventional FSW (C-FSW) processes. The results of the comparative studies on the micro-hardness characteristics and mechanical properties of the two welding processes indicate that welding using the bobbin tool can significantly reduce hardness and improve both weld formation and mechanical properties of joints. This study showed that the design of the welding tool has a big impact on the weld strength. An improvement in the mechanical properties of the specimens welded by BT-FSW was observed to give a better welding quality for the polymers studied.

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刀具设计对筒管搅拌摩擦焊接高密度聚乙烯片材力学性能影响的实验研究

通过搅拌摩擦焊接（FSW）技术焊接聚合物是几种已知组装技术中的一种组装工艺，该组装技术包括在没有填充材料的情况下焊接两种材料。FSW工艺是基于在轴向力作用下由于摩擦和材料变形而产生的热量。在影响材料流动的主要方面中，焊接工具几何形状的选择对于提高焊接质量具有重要意义。这项工作的主要目标是使用FSW技术焊接聚合物。开发了一种焊接HDPE（高密度聚乙烯）板的新方法，称为BT-FSW（筒管工具搅拌摩擦焊）。BT-FSW成功焊接了用于天然气分配的标准矩形。对从焊接板材上切下的样品进行了拉伸试验和硬度测量，并对结果进行了分析，以比较通过BT-FSW和传统FSW（C-FSW）工艺焊接的板材的机械特性。对两种焊接工艺的显微硬度特性和力学性能的比较研究结果表明，使用筒管工具进行焊接可以显著降低硬度，改善焊缝成形和接头的力学性能。研究表明，焊接工具的设计对焊缝强度有很大影响。观察到BT-FSW焊接试样的力学性能有所改善，从而为所研究的聚合物提供了更好的焊接质量。

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 Engineering Research in Africa ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

14.30%

发文量

期刊介绍： "International Journal of Engineering Research in Africa" is a peer-reviewed journal which is devoted to the publication of original scientific articles on research and development of engineering systems carried out in Africa and worldwide. We publish stand-alone papers by individual authors. The articles should be related to theoretical research or be based on practical study. Articles which are not from Africa should have the potential of contributing to its progress and development.