Effect of arc stud welding parameters on the microstructure and mechanical properties of AA6061 and AA5086 aluminium alloys

Q3 Engineering

Journal of Achievements in Materials and Manufacturing Engineering Pub Date : 2021-09-01 DOI:10.5604/01.3001.0015.4796

M. Razzaq, A. Abood

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引用次数: 0

Abstract

Purpose: This paper aims to investigate the effect of arc stud welding (ASW) process parameters on the microstructure and mechanical properties of AA6061-T6 and AA5086-H116 joint. Design/methodology/approach: ASW process was done with argon as a shielding gas. Optical microscope (OM), scanning electron microscope (SEM), and X-Ray Diffraction (XRD) were employed to investigate the influence of welding current, welding time, and gas flow-rate on the microstructure of the fusion zone (FZ). Torque strength and Microhardness tests were used to evaluate the mechanical properties of the welded joints. Findings: OM and SEM showed a cellular dendritic structure with equiaxed zone and columnar dendritic are forming at welding zone and weld interface. XRD analysis showed the precipitation of Mg2Si and Al3Mg2 in the similar and dissimilar joints. Similar ASW of AA6061-T6/AA6061-T6 recorded 19 N.m torque strength, while dissimilar welding of AA6061-T6/AA5086-H116 registered 23 N.m. With increasing heat input, grains in Fusion Zone (FZ) and Heat Affected Zone (HAZ) coarsen and the hardness in both zones decreased. The hardness of similar weldments indicated a remarkable softening of FZ, while lower hardness values were registered in HAZ of dissimilar weldments. Softening of both weldments is due to the dissolution of the strengthening precipitates. Hot cracks exist with similar weldments, while no cracks evidence with dissimilar weldments. Research limitations/implications: The main challenge in this work was how to minimize porosity level and how to avoid hot crack in the FZ. Practical implications: The application of ASW with ceramic ferrule has an important role in different production areas such as; automobile industry, aircraft applications, and appliances industry. Originality/value: Study the effect of welding current, welding time, and gas flow-rate of ASW process on microstructure and mechanical properties of AA6061-T6 and AA5086-H116 joint.

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电弧螺柱焊参数对AA6061和AA5086铝合金组织和力学性能的影响

目的:研究电弧螺柱焊(ASW)工艺参数对AA6061-T6和AA5086-H116接头组织和力学性能的影响。设计/方法/方法:ASW工艺采用氩气作为保护气体。采用光学显微镜(OM)、扫描电镜(SEM)和x射线衍射仪(XRD)研究了焊接电流、焊接时间和气体流量对熔合区(FZ)组织的影响。采用抗扭强度和显微硬度试验对焊接接头的力学性能进行了评价。结果:在焊接区和焊缝界面处形成了等轴区和柱状枝晶的细胞状枝晶结构。XRD分析表明，相似和不同节理中均有Mg2Si和Al3Mg2的析出。AA6061-T6/AA6061-T6类似焊接的抗扭强度为19 N.m, AA6061-T6/AA5086-H116不同焊接的抗扭强度为23 N.m。随着热输入的增加，熔合区(FZ)和热影响区(HAZ)晶粒变粗，两者硬度均下降。相似焊件的热影响区硬度软化明显，而不同焊件的热影响区硬度值较低。两种焊件的软化是由于强化析出物的溶解。相似焊件存在热裂纹，不同焊件不存在热裂纹。研究局限性/启示:本研究的主要挑战是如何最小化孔隙率和如何避免FZ中的热裂纹。实际意义:陶瓷卡箍ASW在不同生产领域的应用具有重要作用，如;汽车工业、飞机应用、家电工业。独创性/价值:研究焊接电流、焊接时间、ASW工艺气体流量对AA6061-T6和AA5086-H116接头组织和力学性能的影响。

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来源期刊

Journal of Achievements in Materials and Manufacturing Engineering Engineering-Industrial and Manufacturing Engineering

CiteScore

2.10

自引率

0.00%

发文量

期刊介绍： The Journal of Achievements in Materials and Manufacturing Engineering has been published by the Association for Computational Materials Science and Surface Engineering in collaboration with the World Academy of Materials and Manufacturing Engineering WAMME and the Section Metallic Materials of the Committee of Materials Science of the Polish Academy of Sciences as a monthly. It has 12 points which was received during the evaluation by the Ministry of Science and Higher Education journals and ICV 2017:100 on the ICI Journals Master list announced by the Index Copernicus. It is a continuation of "Proceedings on Achievements in Mechanical and Materials Engineering" published in 1992-2005. Scope: Materials[...] Properties[...] Methodology of Research[...] Analysis and Modelling[...] Manufacturing and Processingv Biomedical and Dental Engineering and Materials[...] Cleaner Production[...] Industrial Mangement and Organisation [...] Education and Research Trends[...]