Abstract:

Aluminum alloys are being used in the industry because of their outstanding properties such as lightness, corrosion resistance and other properties are also good. Both physical or mechanical characteristics are combined with the aluminum alloys used in the structures, different types of alloy materials are derived from each other. The different types of aluminum AA5754 and AA6013 alloys presented in this study are combined in different source parameters with the sub-gas metal arc source (GMAK) method. Three-point swing and thickness characteristics are also applied to the source connections. Also, the resource area is characterized by hardness tests and micro-structure work. Three-point swing tests resulted in the combined samples in the appropriate parameters swing 180°, while in the inappropriate parameters, fractures and fractures from the ergime limit were identified. The highest density is measured by the AA5754 ITAB (the area under the heat installation). The combinations have been determined to be close to each other by the AA6013 ITAB and the density values measured by source metals. As a result of the hardness tests, the highest hardness values were measured in AA6013 ITAB, followed by source metal and AA5754 ITAB, respectively. Microwave studies have found that all the source metal has a dentritic structure.

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Abstract:

The use of aluminum alloys in industry have been increased in due to their excellent low weight, corrosion resistance also other good features. Different aluminum alloys are joined with together when need of a structure presents different physical or mechanical properties with together. In this study, different aluminum alloys AA5754 and AA6013 joined by GMAW (gas metal arc welding) method under different welding parameters. After that, three-point bending test was carried out and notch impact test was performed to determine toughness behavior of the joints. In addition, the weld zone is characterized with hardness test and microstructure studies. While the welded samples joined with convenient parameters were bended 180°, the cracks and fractures were occurred on the fusion line boundary of some samples due to unsuitable parameters. According to impact toughness test results, the highest toughness value was obtained from the HAZ (Heat affected zone) of AA5754. Besides, toughness values evaluated from the HAZ of AA6013 on the joints and weld metal were nearly same. With respect to hardness test results, the maximum hardness value was measured at the HAZ of AA6013 and this was followed by the weld metal and the HAZ of AA5754 sequentially. From the point of microstructure inspections, structures of all the weld metals were dendritic.