International Research Journal of Engineering and Technology (IRJET) Volume: 11 Issue: 08 | Aug 2024
www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
Study The effect of Process Parameters on Weld Quality and Perform Uniaxial Tensile Test Sumer Singh#1 #College Of Technology and Engineering, Udaipur
------------------------------------------------------------------------***------------------------------------------------------------------------Abstract -With the changing attitude of society towards the environment, the use of laser welded blanks could be very beneficial to the automotive industries. This includes reducing scrap from manufacturing and making their product more energy efficient. Along with the reduction of scrap, the automotive industry is subjected to more and more stringent government regulation for fuel efficiency. There is currently a large interest in developing lightweight alloys that can be used in an automobile to replace heavier steel parts, resulting in weight reductions of the vehicle without sacrificing strength. Metallic material such as aluminium and magnesium, high-strength steels, carboncarbon composites as well as a number of novel metallic composites is all under investigation in terms of viability and practicality for use in high production in automobile. A unique combination of properties puts aluminium and its alloys amongst our most versatile engineering and construction materials. All alloys are light in weight, yet some have strengths greater than that of structural steel. For automotive applications aluminium alloy sheets have the advantages of corrosion resistance, high strength to weight ratio, and recyclability.
Fig 1.1(a) Schematic illustration of the Friction Stir Welding process [1] (b) An FSW weld between Aluminium sheets
Laser, electron beam, tungsten inert gas, metal inert gas and friction stir welding processes have been used for creating tailor welded blanks. However, due to the small heat effected zone (HAZ) and fusion zone, the laser and electron beam welding process produce less impact on material properties than others. Laser welding has been the most frequently used process for producing TWBs due to the lower cost and greater flexibility compared to those of electron beam welding. However, there are several difficulties to develop TWB particularly for aluminum and magnesium alloys because of their high reflectivity, low molten viscosity and inherent oxide layer, conventional laser welding leads to hot cracking in the fusion zone and the poor coupling during welding process. Therefore, as a newly emerging welding technology for TWB, friction stir welding (FSW) was developed primarily for aluminum alloys. Friction stir welding was invented by Wayne Thomas at TWI (The Welding Institute), and the first patent applications were filed in the UK in December 1991. Initially, the process was regarded as a “laboratory” curiosity, but it soon became clear that FSW offers numerous benefits in the fabrication of Aluminum products.
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Friction stir welding (FSW) is a solid–state, hot–shear joining process in which a rotating tool with a shoulder and a pin, moves along the butting surfaces of two rigidly clamped plates placed on a backing plate as shown in Fig. 1.1 The shoulder makes contact with the top surface of the work–piece. Heat generated by friction at the shoulder surface, softens the material being welded. Severe plastic deformation and flow of this plasticized metal occurs as the tool is translated along the welding direction. Material is transported from the front of the tool to the trailing edge where it is forged into a joint. Although Fig. 1.1 shows a butt joint for illustration, other types of joints such as lap joints and fillet joints can also be fabricated by FSW. The welding technology for tailor welded blank is well established. What is not understood is the forming characteristics of the TWBs. The problem is the prediction of how the process parameters will influence the weld quality and how the location of welds will influence the formability and their mechanical properties. In this project I will perform the friction stir welding process for producing tailor welded blanks and study the influence of process parameters on weld quality and perform formability test along with
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