The effects of tool rotation speed and traverse speed on friction stir welding of AISI 304 austenitic stainless steel

PENGARUH TOOL ROTATION SPEED TERHADAP SIFAT MEKANIK SAMBUNGAN ALUMINIUM PADUAN 6061 T6 PADA PROSES FRICTION STIR WELDING. Pengelasan aduk tekan merupakan proses pengelasan yang baru dikembangkan pada tahun 1991, hingga saat ini berbagai penelitian terus dilakukan untuk menemukan parameter yang dapat menghasilkan sambungan las yang optimum sebagai alternatif proses pengelasan fusi yang masih memiliki beberapa kekurangan. Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan putar tool yang menjadi salah satu parameter penting dalam friction stir welding pada pelat aluminium paduan 6061-T6 dengan tebal 6 mm terhadap sifat mekanik sambungan las, dengan variasi kecepatan putar yang digunakan 910 rpm, 1175 rpm, 1555 rpm, 1700 rpm dan 2000 rpm untuk mendapatkan parameter yang optimum. Berdasarkan penelitian yang telah dilakukan didapatkan hasil bahwa sambungan las dengan kecepatan putaran 910 rpm, 1175 rpm dan 1555 rpm tidak terdapat cacat dan memenuhi kriteria sambungan las berdasarkan standar AWS D17.3 sedangkan sambungan las yang memiliki sifat mekanik yang paling optimum yaitu sambungan las dengan kecepatan putar tool 910 rpm karena pengkasaran butir dan larutnya presipitat tidak terlalu signifikan dibandingkan dengan kecepatan putaran lainnya.Kata kunci: Pengelasan aduk tekan, pengelasan fusi, kecepatan putar, tool, aluminium paduan 6061-T6.

Download Full-text

High Quality-High Speed Friction Stir Welding of 304 Austenitic Stainless Steel

Tetsu-to-Hagane ◽

10.2355/tetsutohagane.94.539 ◽

2008 ◽

Vol 94 (11) ◽

pp. 539-544 ◽

Cited By ~ 6

Author(s):

Takeshi Ishikawa ◽

Hidetoshi Fujii ◽

Kazuo Genchi ◽

Shunichi Iwaki ◽

Shigeki Matsuoka ◽

...

Keyword(s):

Stainless Steel ◽

Friction Stir Welding ◽

Austenitic Stainless Steel ◽

High Speed ◽

High Quality ◽

Friction Stir ◽

304 Austenitic Stainless Steel

Download Full-text

Path Force Control for Friction Stir Welding Processes

ASME 2008 Dynamic Systems and Control Conference, Parts A and B ◽

10.1115/dscc2008-2111 ◽

2008 ◽

Cited By ~ 2

Author(s):

Xin Zhao ◽

Prabhanjana Kalya ◽

Robert G. Landers ◽

K. Krishnamurthy

Keyword(s):

Friction Stir Welding ◽

Force Control ◽

Rotation Speed ◽

Smith Predictor ◽

Communication Delay ◽

Pole Placement ◽

Friction Stir ◽

Tool Rotation Speed ◽

Welding Processes ◽

Tool Rotation

In Friction Stir Welding (FSW) processes, force control can be used to achieve good welding quality. This paper presents the systematic design and implementation of a FSW path force controller. The path force is modeled as a nonlinear function of the FSW process parameters (i.e., plunge depth, tool traverse rate, and tool rotation speed). An equipment model, which includes a communication delay, is constructed to relate the commanded and measured tool rotation speed. Based on the dynamic process and equipment models, a feedback controller for the path force is designed using the Polynomial Pole Placement technique. The controller is implemented in a Smith Predictor–Corrector structure to compensate for the inherent equipment communication delay and the controller parameters are tuned to achieve the best closed loop response possible given equipment limitations. In the path force controller implementation, a constant path force is maintained, even in the presence of gaps, and wormhole generation during the welding process is eliminated by regulating the path force.

Download Full-text

Microstructural Evolution in 304 Austenitic Stainless Steel during Friction Stir Welding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.580-582.9 ◽

2008 ◽

Vol 580-582 ◽

pp. 9-12 ◽

Cited By ~ 1

Author(s):

Hiroyuki Kokawa ◽

Seung Hwan C. Park ◽

Yutaka S. Sato ◽

Kazutaka Okamoto ◽

Satoshi Hirano ◽

...

Keyword(s):

Stainless Steel ◽

Friction Stir Welding ◽

Austenitic Stainless Steel ◽

Base Material ◽

Austenite Matrix ◽

Maximum Hardness ◽

Electron Microscopic ◽

Friction Stir ◽

Density Of Dislocations ◽

304 Austenitic Stainless Steel

The characteristics of microstructures in friction stir (FS) weld of 304 austenitic stainless steel were examined. The stir zone (SZ) and thermomechanically affected zone (TMAZ) showed dynamically recrystallized and recovered microstructures, respectively. The hardness of the SZ was higher than that of the base material and the maximum hardness was located in the TMAZ. The higher hardness in TMAZ was attributed to high density of dislocations and sub-boundaries. Electron microscopic observations revealed that ferrite and sigma phases were formed in austenite matrix in the SZ during friction stir welding (FSW).

Download Full-text

Effect of Tool Rotation Speed on Mechanical Properties and Microstructure as the Results of Friction Stir Welding Method on Aluminium 5083-7075

Indonesian Journal of Physics ◽

10.5614/itb.ijp.2016.27.1.2 ◽

2016 ◽

Vol 27 (1) ◽

pp. 9-17

Author(s):

Maryati Maryati ◽

Bambang Soegijono ◽

M Yudi Masduky ◽

Tarmizi Tarmizi

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Friction Stir Welding ◽

Rotation Speed ◽

Incomplete Fusion ◽

Connection Form ◽

Friction Stir ◽

Tool Rotation Speed ◽

Speed Rotation ◽

Tool Rotation

Friction Stir Welding (FSW) is a new method of welding process which is affordable and provide good quality. Aluminium 5083-7075 has been connected successfully by using friction stir welding (FSW) method into butt joint connection form. Tool rotation speed is one of the important parameters in FSW. The changes of rotation speed will affect the characteristics of mechanical properties and microstructure. The parameters of welding being used are welding speed of 29 mm/minutes by varying the speed rotation of 525 rpm, 680 rpm, 910 rpm, and 1555 rpm. In order to find out the mechanical strength of welds, tensile strength and hardness testing is done while finding out the microstructure will be done by using optical microscope and Scanning Electron Microscope (SEM). The result of the research showed that the highest tensile strength obtained at 910 rpm speed rotation about 244.85 MPa and the greatest hardness values was found on aluminium 5083 around the wheel zone area about 96 HV with rotary speed of 525 rpm. Then, the result of testing the macro and microstructure on all samples indicated defect which is seen as incomplete fusion and penetration causing the formation of onion rings. In other words, it is which showed that the result of stirring and tacking in the welding area is less than perfect.

Download Full-text

Effect of welding parameters on mechanical properties and microstructure of friction stir welded brass joints

Matériaux & Techniques ◽

10.1051/mattech/2018060 ◽

2018 ◽

Vol 106 (6) ◽

pp. 606 ◽

Cited By ~ 1

Author(s):

İnan Geçmen ◽

Zarif Çatalgöl ◽

Mustafa Kemal Bilici

Keyword(s):

Mechanical Properties ◽

Friction Stir Welding ◽

Rotation Speed ◽

Stir Zone ◽

Weld Strength ◽

Welding Parameters ◽

Feed Speed ◽

Friction Stir ◽

Tool Rotation Speed ◽

Tool Rotation

Friction stir welding is a method developed for the welding of high-alloy aluminum materials which are difficult to combine with conventional welding methods. Friction stir welding of MS 63 (brass) plates used different tools (tapered cylindrical, tapered threaded cylindrical), tool rotational speeds (1040, 1500, 2080 rpm) and traverse speeds (30,45,75,113 mm.min−1). Tensile, bending, radiography and microstructure tests were carried out to determine the mechanical properties of brass plates joined by friction stir welding technique. Microstructure characterization studies were based on optical microscope and SEM analysis techniques. In addition, after joining operations, radiographs were taken to see the internal structure failure. Brass sheets were successfully joined to the forehead in the macrostructure study. In the evaluation of the microstructure, it was determined that there were four regions of base metal, thermomechanically affected zone (TMEB), heat-affected zone (HAZ) and stir zone. In both welding tools, the weld strength increased with increasing tool rotation speed. The particles in the stir zone are reduced by increasing of the tool rotation speed. Given the strength and % elongation values, the highest weld strength was achieved with tapered pin tool with a tool rotation speed of 1040 rpm and a tool feed speed of 113 min−1.

Download Full-text

Investigation on Friction Stir Welding Parameters of Aluminium Metal Matrix Composites

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.11.2.24 ◽

2019 ◽

Vol 11 (2) ◽

Author(s):

M. Sucharitha ◽

B. Ravisankar

Keyword(s):

Friction Stir Welding ◽

Metal Matrix ◽

Rotation Speed ◽

Friction Stir Weld ◽

Welding Parameters ◽

Friction Stir ◽

Tool Rotation Speed ◽

Wide Range ◽

Tool Rotation ◽

Aluminium Metal

Friction stir welding could be a solid-state welding has a wide range of applications in industries like aerospace and automobile industries. In this work, the friction stir weld ability of aluminium metal matrix composite(AMMC) using H13 tool and sensitivity of parameters like tool rotation speed, traverse speed and axial force are assessed on final durability, hardness and microstructure. It was observed that the tensile strength and hardness are increased by increasing the tool rotation speed. The microstructure showed fine Al-Mg-Si eutectic particles in a matrix of Al solid solution.

Download Full-text