Optimization of Friction stir welding parameter for AA 5083 by radiography and ultrasonic technique

2011 ◽  
Author(s):  
Vidya Joshi ◽  
Krishnan Balasubramaniam ◽  
Raghu V. Prakash
Keyword(s):  
Friction Stir Welding ◽  
Welding Parameter ◽  
Ultrasonic Technique ◽  
Friction Stir

Microstructure and Mechanical Properties at the Unsteady Areas of Non-Linear Friction Stir Welding

2007 ◽  
Vol 561-565 ◽  
pp. 1059-1062 ◽  
Author(s):  
H. Takahara ◽  
Masato Tsujikawa ◽  
Sung Wook Chung ◽  
Y. Okawa ◽  
Kenji Higashi
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Welding Parameter ◽  
Butt Joints ◽  
Friction Stir ◽  
Non Linear ◽  
Linear Friction ◽  
Fsw Parameters ◽  
Five Axis ◽  
Welding Direction

The influence of tool control in non-linear friction stir welding (FSW) on mechanical properties of joints was investigated. FSW is widely applied to linear joints. It is impossible for five axis FSW machines, however, to keep all the FSW parameters in optimum conditions at non-linear welding. Non-linear FSW joints should be made by compromise with the order of priority for FSW parameters. The tensile test results of butt joints with rectangular change in welding direction on plate plane (L-shaped butt joints) with various welding parameter change. It was found that turn to the retreating side is encouraged when welding direction change. And the method of zero inclination tool angle is effective at non-linear and plane welding.

Polyethylene friction stir welding parameter optimization and temperature characterization

2018 ◽  
Vol 99 (1-4) ◽  
pp. 127-136 ◽  
Author(s):  
Shayan Eslami ◽  
J. Francisco Miranda ◽  
Luis Mourão ◽  
Paulo J. Tavares ◽  
P. M. G. P. Moreira
Keyword(s):  
Friction Stir Welding ◽  
Parameter Optimization ◽  
Welding Parameter ◽  
Friction Stir

scholarly journals Welding parameter maps to help select power and energy consumption of friction stir welding

2018 ◽  
Vol 33 ◽  
pp. 35-42 ◽  
Author(s):  
WoongJo Choi ◽  
Justin D. Morrow ◽  
Frank E. Pfefferkorn ◽  
Michael R. Zinn
Keyword(s):  
Energy Consumption ◽  
Friction Stir Welding ◽  
Welding Parameter ◽  
Friction Stir ◽  
Power And Energy

Establishing optimal friction stir welding parameters for AA2219-T87 Al-alloy using comprehensive RSM and GA approach

2021 ◽  
Author(s):  
Boddu Rajnaveen ◽  
Govada Rambabu ◽  
Kollabothina Prakash ◽  
Kotipalli Srinivasa Rao
Keyword(s):  
Friction Stir Welding ◽  
Aluminium Alloy ◽  
Welding Process ◽  
Welding Parameter ◽  
Welding Parameters ◽  
Al Alloy ◽  
Regression Equations ◽  
Corrosion Properties ◽  
Friction Stir ◽  
Aa2219 Alloy

Abstract AA2219-T87 aluminium alloy has been used in aerospace applications because of its high strength, low density and resistance to corrosion. The copper in the alloy improves the hardness and lowers melting point, which makes two sections easily joined with a process called friction stir welding of aluminium alloy. In the present work, heat-treated AA2219 alloy was butt welded by solid-state friction stir welding process. This work aims to develop a suitable combination of welding parameters for producing defect-free weld joints of AA2219 alloy to improve tensile and corrosion properties. The most influencing control parameter for optimising the friction stir welding responses was determined using sophisticated design of experiments (DOE) techniques. Ultimate tensile strength and corrosion resistance are observed as responses in this study. To achieve the desired weld responses, a three-factor, three-level Box-behneken design was used. Analysis of Variance (ANOVA) was carried out to examine the interaction effect and significant welding parameter to set the optimal level of welding conditions. Multi-response regression equations have been developed using response surface methodology (RSM) to estimate the output characteristics of weld. The Genetic algorithm (GA) was used to optimise the predicted mathematical model under given optimization constraints. The results shown that the optimum responses are obtained at input factors rotational speed 300 rpm, welding speed 80 mm/min, and axial force of 10kN.

Effects of Tool Design and Friction Stir Welding Parameters on Weld Morphology in Aluminum Alloys

2010 ◽  
Vol 638-642 ◽  
pp. 1261-1266 ◽  
Author(s):  
Christian A. Widener ◽  
Dwight A. Burford ◽  
Sarah Jurak
Keyword(s):  
Electrical Conductivity ◽  
Friction Stir Welding ◽  
Grain Orientation ◽  
Mechanical Performance ◽  
Tool Design ◽  
Welding Parameter ◽  
Welding Parameters ◽  
Microstructural Changes ◽  
Mechanical Process ◽  
Friction Stir

Friction stir welding (FSW) is a complex thermo-mechanical process which produces wrought microstructure with microstructural gradients in grain size, grain orientation, dislocation density, and precipitate distribution. The type and degree of microstructural modification is a function of the particular alloy chosen, its initial temper, the tool design and corresponding weld process parameter window, and other variables like material thickness, size, fixturing, etc. Since the microstructural changes produced can dramatically affect resultant mechanical performance and corrosion response, a thorough understanding of the variables involved in those changes is needed. A design of experiments approach was used to study the effects of welding parameter selection on the microstructural changes wrought by FSW with two different sizes of the same FSW tool design. A combination of microhardness mapping and electrical conductivity testing was used to investigate potential differences. The importance of these factors and the means for characterizing them for developing standards and specifications are also discussed.

scholarly journals Thermal Dissipation Effect on Temperature-controlled Friction Stir Welding

2019 ◽  
Vol 24 ◽  
Author(s):  
Ana Magalhães ◽  
Jeroen De Backer ◽  
Gunnar Bolmsjö
Keyword(s):  
Friction Stir Welding ◽  
Temperature Control ◽  
Tensile Tests ◽  
Fast Response ◽  
Lap Joints ◽  
Thermal Dissipation ◽  
Welding Parameter ◽  
Weld Quality ◽  
Welding Temperature ◽  
Friction Stir

Abstract During Friction Stir Welding (FSW) of complex geometries, the thermal dissipation, induced by geometric features or the surrounding environment, may strongly affect the final weld quality. In order to guarantee a consistent weld quality for different conditions, in-process welding parameter adaptation is needed. This paper studies the effect of thermal dissipation, induced by the backing bar thermal conductivity, on the weld temperature and the temperature controller response to it. A new temperature sensor solution, the Tool-Workpiece Thermocouple (TWT) method, was applied to acquire online temperature measurements during welding. An FSW-robot equipped with temperature control, achieved by rotation speed adaptation, was used. AA7075-T6 lap joints were performed with and without temperature control. The cooling rate during welding was register plus macrographs and tensile tests were assessed. The controller demonstrated a fast response promoting the heat input necessary to maintain the set welding temperature. The results demonstrated that temperature control using the TWT method is suitable to achieve higher joint performance and provides a fast setup of optimal parameters for different environments.

scholarly journals WELDABILITY AND MECHANICAL PROPERTIES OF DISSIMILAR AL-MGSI TO PURE ALUMINIUM AND AL-MG USING FRICTION STIR WELDING PROCESS

2018 ◽  
Vol 81 (1) ◽  
Author(s):  
Nor Fazilah Mohd Selamat ◽  
Amir Hossein Baghdadi ◽  
Zainuddin Sajuri ◽  
Amir Hossein Kokabi
Keyword(s):  
Friction Stir Welding ◽  
Aluminium Alloys ◽  
Welding Process ◽  
Fusion Welding ◽  
Welding Parameter ◽  
Pure Aluminium ◽  
Base Metals ◽  
Dissimilar Joints ◽  
Friction Stir ◽  
Solid State Joining

Friction stir welding (FSW) is a gateway for the implementation of a solid state joining method between two lightweight materials especially aluminium alloys. Dissimilar joints of aluminium alloys have an issue to be weld using the conventional fusion welding. In the present work, two types of dissimilar joints of aluminium alloys were welded as dissimilar butt joints using the FSW method. 5mm thick base metals, consist of AA1100, AA5083 and AA6061, were butt welded to dissimilar joints of AA6061-AA1100 and AA6061-AA5083. Similar welding parameter was used for both of the joints, in which 100 mm/min and 1000 rpm for transverse and rotation speed, respectively. Joints were successful with defect-free internally and externally. However, different flow patterns were observed in the stirred zone due to the different materials flow during the FSW process. The ultimate tensile strength of AA6061-AA1100 and AA6061-AA5083 are 93MPA and 113MPa. Thereby, the joint efficiency of AA6061-AA1100 and AA6061-AA5083 were 80% and 97% compared to AA6061 base metal, respectively.

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