Probing the influence of cold wire gas tungsten arc welding current waveforms on the aluminum-steel joining
Autor: | Jason Cheon, Navneet Arora, Degala Venkata Kiran, Tinku Kumar |
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Rok vydání: | 2020 |
Předmět: |
0209 industrial biotechnology
Materials science Strategy and Management Gas tungsten arc welding Acoustics 02 engineering and technology Welding Management Science and Operations Research 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering law.invention Arc (geometry) Synchronization (alternating current) 020901 industrial engineering & automation law Waveform Sine Current (fluid) 0210 nano-technology Voltage |
Zdroj: | Journal of Manufacturing Processes. 59:378-388 |
ISSN: | 1526-6125 |
Popis: | Cold wire gas tungsten arc welding (GTAW) process is used to join AA6061-T6 and galvannealed (GA) steel. The welding current distributed in sine, rectangle, square, and triangle AC waveform is used to understand their influence on the arc behavior, temperature distribution, joint profile, and the intermetallic compound (IMC) layer thickness. The instantaneous welding current and voltage waveforms are recorded in synchronization with the high-speed arc images to understand the arc behavior and heat input. The rate of change of instantaneous welding current between the polarities and the arc duration at the peak current is more in square and rectangle waveforms. The peak current in both the positive and negative pulses and the arc heat input of the triangle waveform is the highest among all the waveforms considered in the present work. The wetting length increases along with the reduction in the bead height sequentially with sine, rectangle, square, and triangle waveforms for a constant machine setting welding current. IMC layer thickness is minimum for the sine waveform and maximum for the triangle waveform. Overall, the welding current distributed in sine waveform is found to be suitable among all the waveforms studied in the present work for dissimilar metal joining of aluminum to steel. |
Databáze: | OpenAIRE |
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