Analysis of welded joints using friction stir welding, Metal Inert Gas and Tungsten Inert Gas (original) (raw)
Related papers
2018
Friction Stir Welding (FSW) is a solid-state welding technique that can join material without melting the plates to be welded. In this work, we are interested to demonstrate the potentiality of FSW for joining the heat-treatable aluminum alloy 2024-T3 which is reputed as difficult to be welded by fusion techniques. Thereafter, the FSW joint is compared with another one obtained from a conventional fusion process Tungsten Inert Gas (TIG). FSW welds are made up using an FSW tool mounted on a milling machine. Single pass welding was applied to fabricated TIG joint. The comparison between the two processes has been made on the temperature evolution, mechanical and microstructure behavior. The microstructural examination revealed that FSW weld is composed of four zones: Base metal (BM), Heat affected zone (HAZ), Thermomechanical affected zone (THAZ) and the nugget zone (NZ). The NZ exhibits a recrystallized equiaxed refined grains that induce better mechanical properties and good ductili...
The investigation focussed on the modelling by finite elements of heat transfer and Von Mises stress field and simulation of the tensile test when applying friction stir welding (FSW) and classical Tungsten Inert Gas (TIG) welding at the aluminium alloy AA 6082-T6 butt joints performing. Both the numerical and experimental results revealed big differences between the behaviour of the base materials welded by FSW and TIG. It is important to study the heat transfer mode during the welding process, because it has a huge influence on the mechanical properties changes of the welded joint. The capability of a welded joint to resist breaking under tensile stress is one of the most important and widely fundamental mechanical tests used in the analysis of the materials behaviour at welding. Tensile properties indicate how the material will react to forces being applied in tension. Whilst the tensile strength of the TIG welded joints represents 66% from that of the parent metal, in the case o...
International Journal of Engineering Research and Technology (IJERT), 2016
https://www.ijert.org/experimental-investigation-on-weldability-aspects-of-aluminium-6063-alloy-using-friction-stir-welding-and-gas-tungsten-arc-welding https://www.ijert.org/research/experimental-investigation-on-weldability-aspects-of-aluminium-6063-alloy-using-friction-stir-welding-and-gas-tungsten-arc-welding-IJERTV5IS040126.pdf In the present study aluminium 6063 plates were used to evaluate its weldability properties by using two different welding processes such as Friction stir welding (FSW) and Gas tungsten arc welding (GTAW). For both base metal and weld bead tensile properties and Vickers hardness values were evaluated as per ASTM standards. It is found that the ultimate tensile strength in both welding processes significantly decreased as compared to base metal. The Vickers hardness values of welded samples in both welding processes increased marginally. The above mechanical properties were correlated by using optical microscopy. Keywords-Aluminium 6063 alloy; tensile strength; Vickers hardness I. INTRODUCTION Aluminium alloys known to possess excellent corrosion resistance and significant lower density than other competing alloys of similar mechanical performance. To take advantage of these promising features in structural applications , methods of joining aluminium alloys must be thoroughly investigated and understand to maximize this structural capabilities of these aluminium alloys. Welding is a process of joining two similar or dissimilar metals (usually metals) through localized coalescence resulting from a suitable combination of temperature, pressure and metallurgical conditions [1]. Depending upon the combination of temperature and pressure, a wide range of welding processes, like-gas welding, arc welding, resistance welding, solid state welding, thermo-chemical welding and high energy beam welding, have been developed. All these welding processes result different weld bead profiles and angular distortions to weld-pieces as governed by the inherent characteristics of process and processing parameters. Al-Mg-Si alloys have been used extensively in the fabrication of aerospace, automotive and marine components due to their superior mechanical properties such as low density, high strength/weight ratio, excellent weldability [2]. Amongst Al alloys, Al-Mg-Si (6XXX) alloys have got further preference in industrial applications as these alloys contain very fewer amount of alloying elements (0.4 to 0.9 wt.% Mg and 0.2 to 0.6wt.% Si) which makes them cheaper than other series like AlCu (2XXX) and Al-Zn (7XXX) alloys [3]. Al alloys of the 6000 series
2013
In this study two different welding processes have been considered, a conventional tungsten inert gas (TIG) and a relatively new solid state welding known as friction stir welding (FSW). TIG welding process has been performed on Al 6061-T6 of thickness 4mm by using filler metal of Al-Mg alloy type (ER5356) according to AWS classification metal with tungsten electrode (EWth-2) and arc voltage of (12V). Various welding currents of (125, 160, 200, 225) Amp were used under argon as shielding gas of flow rate of (15-20 cf / hour) and welding speed of 280 mm/min. Friction stir welding is carried out using automatic milling machine with five different welding or bed speeds of (25-50-80-100-125 mm/min) and five different tool rotation speeds of (630 -800-1000-1250-1600 rpm). Tool steel of type R18 consists of a shoulder with diameter of (20 mm) and pin of diameter (5.5 mm). Xray radiographic inspection, tensile test and microhardness test of FSW and TIG joints at optimum welding conditions ...
Materials Today: Proceedings, 2020
Aluminium 7075 being the workhorse of the Aluminum series has a wide range of applications in industries like aerospace, automotive, transport, etc. due to its high strength to density ratio, light weight and good corrosion resistance. It has been observed that it is difficult to weld the 7075 alloy using Tungsten inert gas (TIG) welding metal inert gas (MIG) welding or any other conventional method as it encounters solidification and recrystallization problems like cracking and porosity which hamper the weld strength. Hence, in this paper we have attempted to weld the 7075 alloy using friction stir welding, a solid state welding process that does not involve the melting of the sample and hence avoids problems related to solidification of the weld. The weld strength of the same is tested by applying tensile test, hardness test and microstructure analysis. The aforementioned tests are applied on the 7075 alloy welded by autogenous TIG welding and the weld strength of the two welding methods is compared.
International Journal of Engineering Research and Advanced Technology, 2017
The effect of different welding parameters on the mechanical properties and tensile behavior of tungsten inert gas (TIG) welded joints was analyzed. Four different groove angles were chosen, 60°, 70°, 80° and 90°, to ascertain the tendency of microstructure formation and quality of the weld. Mechanical properties were assessed in the terms of Vickers HV1 hardness. Microanalysis of test samples produced using different current 165 A, 180 A, 200 A with same groove angle of 90° was done in fusion, partially melted, and heat affected zone; all the images showed good penetration and clear transition from one to following zone. The transverse tensile tests were accomplished on the welded joints to evaluate influence of welding parameters and groove geometry to the joint tensile strength and its behavior during exploitation. It was verified that the tensile strength of the welds is closely related to the welding parameters. The chosen 180 A welding current ensured highest tensile strength of test samples; the same as proper selection of groove angle (90°) provides good fusion and high quality of major welds. The results revealed that the weld penetration depends on welding current.
EXPERIMENTAL INVESTIGATIONS OF TIG AND FRICTION STIR WELDING PROCESS FOR AA7075
Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir welding (FSW) and investigating on parental metal. solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic atomic diffusion. an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of tensile strength experiments conducted speed different from the tungsten inert gas welded joint. The weld nugget consists of small grains in tensile strength gas welding. Hardness test of friction stir welding is more instead of tungsten inert gas welding where as in parental metal also. ABSTRACT Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir welding (FSW) and investigating on parental metal. solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic atomic diffusion. an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of tensile strength experiments conducted speed and feed. different from the tungsten inert gas welded joint. The weld nugget consists of small grains in tungsten inert gas weld tensile strength gas welding. Hardness test of friction stir welding is more instead of tungsten inert gas welding where as in parental metal also. Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir welding (FSW) and investigating on parental metal. solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic atomic diffusion. Tungsten Inert Gas welding process that uses an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of tensile strength test and experiments conducted by feed. The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small tungsten inert gas weld tensile strength of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert gas welding where as in parental metal also. Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir welding (FSW) and investigating on parental metal. solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic Tungsten Inert Gas welding process that uses an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of test and Vickers hardness, are considered for investigation by maintaining constant depth of penetration of weld The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small tungsten inert gas weld and those are found in of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert gas welding where as in parental metal also. Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir welding (FSW) and investigating on parental metal. solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic Tungsten Inert Gas welding process that uses an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of Vickers hardness, are considered for investigation maintaining constant depth of penetration of weld The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small and those are found in of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert gas welding where as in parental metal also. Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir welding (FSW) and investigating on parental metal. Friction solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic Tungsten Inert Gas welding process that uses an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of Vickers hardness, are considered for investigation maintaining constant depth of penetration of weld The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small and those are found in of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir Friction Stir Welding (FSW) is a solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic Tungsten Inert Gas welding process that uses the heat produced by an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of Vickers hardness, are considered for investigation maintaining constant depth of penetration of weld The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small and those are found in friction stir welding of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir Stir Welding (FSW) is a solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic the heat produced by an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the process parameters of FSW and TIG on the mechanical properties of the welds. The Vickers hardness, are considered for investigation maintaining constant depth of penetration of weld, The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small friction stir welding. The of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert Aluminum alloys are welded using both tungsten inert gas (TIG) and friction stir Stir Welding (FSW) is a solid state welding process in which the relative motion between the tool and the work piece produces heat which makes the material of two edges being joined by plastic the heat produced by an electric arc created between non consumable tungsten electrode and the weld pool. In this project an attempt is made to compare and investigate the influence of the the welds. The Vickers hardness, are considered for investigation of tool The results indicate that the microstructure of the friction weld is different from the tungsten inert gas welded joint. The weld nugget consists of small. The of weld joint in friction stir welding is more instead of tungsten inert gas welding. Hardness test of friction stir welding is more instead of tungsten inert
Experimental Investigation of Weld Joint of Tungsten Inert Gas Welding (Tig) on Aluminium Alloy
Journal of emerging technologies and innovative research, 2018
Tungsten Inert Gas (TIG) welding is one of the extensively used joining process of aluminium alloy. This process is popular because it gives good weld bead and less metallurgical changes in the outside of HAZ to achieve the good mechanical properties in comparison to other arc welding process. The weld joint accuracy and quality mainly depended on the process parameter like welding speed, current, voltage, gas flow rate etc. This paper focused on process parameter of TIG welding i.e. (travel speed, and current) and other parameters have been kept constant throughout the study and enhancement of mechanical properties of weld joint and optimization of the process parameter. The present work describes the effect of a process parameter of TIG welding in respect of mechanical properties i.e. Ultimate tensile strength of weld joint and hardness of weld bead of AA5052 H32 aluminium alloy, for joining of aluminium plate, filler material AA4043 (Al-5Si (wt. %)) have been used. Keyword— TIG W...
IJERT-Comparative Study Of Friction Stir And Tig Welding For Aluminium 6063-T6
International Journal of Engineering Research and Technology (IJERT), 2012
https://www.ijert.org/comparative-study-of-friction-stir-and-tig-welding-for-aluminium-6063-t6 https://www.ijert.org/research/comparative-study-of-friction-stir-and-tig-welding-for-aluminium-6063-t6-IJERTV1IS10229.pdf An experimental investigation has been carried out on microstructure, hardness distribution and tensile properties of weld butt joints of 6063 T6 aluminum alloy. Two different welding processes have been considered: a conventional tungsten inert gas (TIG) process and an innovative solid state welding process known as friction stir welding (FSW) process. In this study it has been found that heat affected zone of FSW is narrower than TIG welding and mechanical properties like tensile strength etc. are within comfort zone and are better than TIG welding method. Microstructure results also favour FSW. Results showed a general decay of mechanical properties of TIG joints, mainly due to high temperature experienced by the material. Instead, in FSW joint, lower temperatures are involved in the process due to severe plastic deformation induced by the tool motion and lower decay of mechanical properties. Hence from industrial perspectives, FSW process is very competitive as it saves energy, has higher tensile strength, lower residual stress values and prevents the joints from fusion related defects.
An experimental investigation has been carried out on microstructure and tensile properties of weld b of aluminium alloy. Two different welding processes have been considered: a conventional tungsten inert gas (TIG) process and an innovative solid state welding process known as friction stir welding (FSW) process. In this study, it has been found that heat affected zone of FSW is narrower than TIG welding and mechanical properties like tensile strength etc. are within the comfort zone and are better than TIG welding method. Microstructure results also favour FSW. TIG welding process produces the sound joints but the newly developed method friction stir welding process gives better joints than TIG welding process. The effect of two welding processes on mechanical and metallurgical properties is studied in this research work. Mechanical properties of the welded joints were evaluated and it was found that friction stir welded joints have superior mechanical properties as compared to TIG welded joints. From the micro structure analysis, it was observed that fine and equiaxed grains were observed in the friction stir welded joints and coarse grains were observed in TIG welded joints.