The Effects of Critical Welding Parameters on Tensile-Shear Properties of Friction Stir Spot Welded Polyethylene

Year 2017, , 945 - 951, 20.12.2017

Bekir Çevik , Behçet Gülenç Ahmet Durgutlu

https://doi.org/10.2339/politeknik.369105

Cited By: 2

Abstract

The aim of this study was to investigate the weldability of high density
polyethylene via friction stir spot welding method. Polyethylene sheets were
joined with dwell times of 60 to 100 s, three different pin profiles (M6×1,
M6×1.25, M6×1.5) and pin lengths of 3.75 to 4.75 mm by using rotational speed
of 900 rpm and delay time of 45 s. During welding processes, the temperatures
were measured under the welding centers. The tensile-shear tests were performed
to welded samples. Also, macrostructures of welding nuggets were examined. The
small welding nuggets were formed by using the lower dwell time. The melting in welding nugget
occurred in the all dwell times during the welding. The dwell time affected on
the friction temperature. The key (pin) hole closed when sufficient friction
temperature (dwell times of 80 and 100 s). The pin profiles directly affected
the welding quality. Large screw pitch range of the pin and the small pin
length from 4.5 mm negatively affected the weld fracture load. Pin length of the stirring tool directly affected the
quality of welding. 

Keywords

FSSW, polyethylene, welding parameters, tensile-shear properties

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