Influence of process parameters on bead geometry and its effect on mechanical properties of CMT welding of automotive grade steel and aluminium alloy using aluminium based filler wire

Q4 Materials Science

Welding International Pub Date : 2023-09-02 DOI:10.1080/09507116.2023.2256221

Gaurav Nandan, K. S. Arora, Jaivindra Singh, Ajay Kumar

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Abstract

Abstract This investigation aims to examine the effectiveness of torch position, welding-brazing parameters on the embedded bead profile and load carrying potential of the brazed joint of zinc coated DP600 steel and Al 5052 joined by cold metal transfer (CMT) technique. The base metals were joined at different torch position (−0.6, 0 and 0.6 mm) in lap joint position using Al-based filler wire. At different wire feed rate (WFR) 3, 4 and 5 m/min changes in bead shape and its geometry were observed. The various modes of failure were classified based on effective bonding length (LH–LV) and LH/θ ratio. The best combination of welding-brazing parameters at which the maximum load bearing capacity of 4.1 kN and enhanced bead properties was achieved at 0.6 mm torch position and WFR 5 m/min. The intermetallic compound layers formed during the process affect the tensile properties of weld-brazed joint. The possible intermetallics and the presence of major elements in intermetallic layer were analyzed by energy-dispersive X-ray spectroscopic analysis. Furthermore, in this investigation, it was also observed that the thickness of IMC layer increases with the increasing WFR and heat input up to a critical value of 10 µm.

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铝基焊丝汽车级钢与铝合金CMT焊接工艺参数对焊缝几何形状的影响及其对力学性能的影响

摘要本研究旨在检验焊炬位置、焊接钎焊参数对采用冷金属转移（CMT）技术连接的镀锌DP600钢和Al5052钎焊接头的埋珠轮廓和承载潜力的影响。在不同的焊炬位置（-0.6、0和0.6 mm）。在不同的送丝速率（WFR）3、4和5下观察到珠粒形状及其几何形状的变化。根据有效结合长度（LH–LV）和LH/θ比对各种失效模式进行了分类。焊接钎焊参数的最佳组合，最大承载能力为4.1 kN，并且在0.6 mm焊炬位置和WFR 5 米/分钟。焊接过程中形成的金属间化合物层影响焊接接头的拉伸性能。通过能量色散X射线光谱分析，分析了可能的金属间化合物和金属间层中主要元素的存在。此外，在本研究中，还观察到IMC层的厚度随着WFR和热输入的增加而增加，最高可达10的临界值 µm。

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

Welding International Materials Science-Metals and Alloys

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： Welding International provides comprehensive English translations of complete articles, selected from major international welding journals, including: Journal of Japan Welding Society - Japan Journal of Light Metal Welding and Construction - Japan Przeglad Spawalnictwa - Poland Quarterly Journal of Japan Welding Society - Japan Revista de Metalurgia - Spain Rivista Italiana della Saldatura - Italy Soldagem & Inspeção - Brazil Svarochnoe Proizvodstvo - Russia Welding International is a well-established and widely respected journal and the translators are carefully chosen with each issue containing a balanced selection of between 15 and 20 articles. The articles cover research techniques, equipment and process developments, applications and material and are not available elsewhere in English. This journal provides a valuable and unique service for those needing to keep up-to-date on the latest developments in welding technology in non-English speaking countries.