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2 Bulletin of the Polish Academy of Sciences. Technical Sciences

2 Küçükrendeci I.

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The investigation of suitable welding parameters in polypropylene sheets joined with friction stir welding

Küçükrendeci I.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2019

Vol. 67, nr 1

133--140

Welding strength is very important in safe use of polypropylene sheets. The determination of welding parameters and design of the welding tool has an impact on the weld strength. The welding parameters can be determined experimentally. In this study, Charpy impact test is used to determine suitable welding parameters in welding of polypropylene sheets with FSW method. At the same time, the weld zone microstructure is examined and Shore hardness measurements are made. The impact tests were performed on samples cut from the welded sheets. The impact tests values and hardness values were presented graphically. According to the test results, some welded parts behaved similar to the matrix material. In some welding parameters, Charpy impact test values were obtained close to values of the main materials. The suitable welding parameters were determined for polypropylene sheets welding.

Mechanical and microstructural properties of EN AW-6060 aluminum alloy joints produced by friction stir welding

Küçükrendeci I.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2015

Vol. 63, nr 2

475--478

In the study, the mechanical and microstructural properties of friction stir welded EN AW-6060 Aluminum Alloy plates were investigated. The friction stir welding (FSW) was conducted at tool rotational speeds of 900, 1250, and 1500 rpm and at welding speeds of 100, 150 and 180 mm/min. The effect of the tool rotational and welding speeds such properties was studied. The mechanical properties of the joints were evaluated by means of micro-hardness (HV) and tensile tests at room temperature. The tensile properties of the friction stir welded tensile specimens depend significantly on both the tool rotational and welding speeds. The microstructural evolution of the weld zone was analysed by optical observations of the weld zones.