IMPROVEMENT OF HARDNESS AND MECHANICAL PROPERTIES OF DISSIMILAR MATERIALS USING FIBER LASER WELDING OF TI-6AL-4V AND INCONEL 625 ALLOY
Abstract - Nowa days,fibre laser welding are widely used due to its advantages over conventional welding techniques, fiber laser welding is becoming more and more popular in a variety of sectors, including aerospace and automotive, to combine disparate materials.In this study, the effects of fibre laser welding on the mechanical properties and hardness of Ti-6Al-4V and Inconel 625 alloys were investigated. Laser power and welding speed are two examples of welding parameters that were set in order to produce high-quality welds that had relatively few faults and distortions. In order to evaluate the welds' mechanical properties, methods such as microhardness testing, scanning electron microscopy, and others were used.The findings showed that the fibre laser welding boosted the toughness and mechanical properties of the welded joints. The weld width varied randomly when the laser's power was increased from 700 W to 1000 W.It is being investigated how welding speed affects weld width using a constant 1,000 W laser power.When the pace of welding raised from 40 to 100 mm/s, the weld width dropped from 692 to 351 μm. By using a greater laser power and a faster welding efficiency, improved weld quality, and fewer hardness fluctuations and a lower risk of cracking may be produced.
Keywords - Fiber laser welding, Welding of dissimilar materials, Titanium alloy and Inconel alloy, Weld geometry, Weld defect and hardness.