Effect of friction stir welding parameters on morphology and strength of acrylonitrile butadiene styrene plate welds |
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| Affiliation: | 1. CEMUC – Universidade de Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal;2. IPC/I3N – Universidade do Minho, Campus de Azurém, 4800-058 Guimarães, Portugal;1. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran;2. Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran;3. Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran;4. Faculty of Materials Engineering, Sahand University of Technology, Tabriz, Iran;1. Instituto Politécnico de Coimbra, ISEC, DEM, Portugal;2. CEMUC – Department of Mechanical Engineering, University of Coimbra, Portugal;1. Dept. of Production Engineering, Guru Nanak Dev Engineering College, Ludhiana, India;2. Dept. of Mech. Engineering, Punjabi University, Patiala, India;1. School of Mechanical Engineering, College of Engineering, University of Tehran, Iran;2. School of Mechanical Engineering, College of Engineering, University of Tehran, Iran;3. School of Mechanical Engineering, College of Engineering, University of Tarbiat Modares, Iran |
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| Abstract: | The aim of this study is to examine the effect of main friction stir welding (FSW) parameters on the quality of acrylonitrile butadiene styrene (ABS) plate welds. Welds were carried out in a FSW machine, using a tool with a stationary shoulder and no external heating system. The welding parameters studied were the tool rotational speed which varied between 1000 and 1500 (rpm); the traverse speed which varied between 50 and 200 (mm/min), and the axial force ranging from 0.75 to 4 (kN). The major novelty is to study the influence of the parameter axial force on FSW of polymers. Produced welds have always a tensile strength below the base material, reaching the maximum efficiencies of above 60 (%) for welds made with higher rotational speed and axial force. Good quality welds are achieved without using external heating, when the tool rotational speed and axial force are above a certain threshold. Above that threshold the formation of cavities and porosity in the retreating side of the stir zone is avoided and the weld region is very uniform and smooth. For low rotational speed and axial force welds have poor material mixing at the retreating side and voids at the nugget. For this reason the strain at break of these welded plates is low when compared with that of base material. |
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| Keywords: | Friction stir welding Acrylonitrile butadiene styrene Stationary shoulder tool Weld defects Morphology |
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