Abstract
Welding is a fundamental process in many industries. It is a fast-changing technology, continuously evolving, with recent developments in laser and robotic welding, virtual reality and machine learning. Focusing on laser welding, there is a significant interest in this technology, as well as an increasing demand for high-strength lightweight structures, replacing metals in some applications. This work presents an experimental study of the mechanical properties of three types of polyamide 6 joints welded by Nd:YAG laser. After welding, tensile tests were carried out in order to evaluate the influence of the joint type and weld passes on joint strength and weld stresses. The results showed that fairly high weld stresses could be achieved, indicating that good-quality welds were achieved.
Highlights
Nowadays, the combination of materials is essential in many industrial applications
Scarf and lap welded joints were performed on polyamide 6
The used was Ertalon SA 6 supplied by Quadrant Plastics in white and black versions
Summary
The combination of materials is essential in many industrial applications. Laser welding was initially applied in metals. The number of applications of laser welding in polymers has been growing substantially, for example, in the automotive, medical, electronic and aerospace sectors In most of these areas, high-quality, durable and reliable welds are essential, since the welds are exposed to several types of environmental conditions and subjected to different types of loads [2]. Thermoplastic laser welding is a relatively recent and cost-effective joining technique, with many advantages over other joining methods e.g., mechanical fastening and adhesive bonding It allows low-weight structures and facilitates linking with other manufacturing processes. The influence of laser welding process parameters on the weld bead quality of thermoplastic composites with high moisture content has been studied [17].
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