A Study on the Effect of Parameters on the Tensile Strength of Friction Stir Welded AA6061 1.5 mm Thin Plate Butt-Joints

2018 ◽  
pp. 1-12
Author(s):  
Nurfadilah Sukara ◽  
Azman Ismail ◽  
Darulihsan Abdul Hamid ◽  
Fauziah Ab Rahman ◽  
Bakhtiar Ariff Baharudin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Thin Plate ◽  
Butt Joints ◽  
Friction Stir

scholarly journals Microstructural and Fracture Surface Study of Friction Stir Welded AA5082-AA7075 Butt Joints

2020 ◽  
Vol 5 (1) ◽  
pp. 49-56
Author(s):  
Gaurav Kumar ◽  
◽  
Rajeev Kumar ◽  
Ratnesh Kumar
Keyword(s):  
Tensile Strength ◽  
Fatigue Life ◽  
Fracture Surface ◽  
Microstructural Analysis ◽  
Butt Joints ◽  
Friction Stir ◽  
Three Samples ◽  
Mode Of Failure ◽  
Microstructural Behavior ◽  
Scanning Electron

In this study, experiments were performed to analyze the fracture surface and microstructural behavior of friction stir welded (FSW) AA5082-AA7075butt joints. Three samples at varying speeds and constant feed were prepared to identify optimum tool speed to produce FSW AA5082-AA7075 butt joints having maximum tensile strength and fatigue life. A scanning electron microscope (SEM) was used to analyze microstructure and fracture surfaces. The samples prepared exhibited a considerable difference in their fatigue life and tensile strength. Microstructural analysis showed the refinement of grains present in the stir zone (SZ), also known as the weld nugget, and thermo-mechanically affected zone (TMAZ). The study of the fracture surface showed that the mode of failure was ductile in nature

Features for friction stir welding of butt joints of casting VAL8 alloy with wrought 1565chN2 and AMg6M alloys

2021 ◽  
pp. 441-449
Author(s):  
V.A. Berezina ◽  
V.V. Ovchinnikov ◽  
E.V. Luk'yanenko
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
Friction Stir Welding ◽  
Chemical Composition ◽  
Arc Welding ◽  
Butt Joints ◽  
Friction Stir ◽  
Discrete Nature ◽  
Casting Aluminum ◽  
Tool Rotation

The results of technological features for friction stir welding of butt joints of sheet blanks with thickness of 3 mm made of casting aluminum V AL8 alloy with wrought magnalium group 1565chN2 and AMg6M alloys are presented. It is established that the time resistance of the joints depends on the location of the welded alloys relative to the direction of tool rotation during friction stir welding. The ultimate strength of welded joints of VAL8 alloy with 1565chN2 and AMg6 alloys in automatic argon-arc welding is 0.82...0.84 of the ultimate tensile strength of VAL8 alloy. The grain size in the stir zone practically does not depend on the initial grain size in the alloys to be joined. The destruction of the joints made of VAL8 + 1565chH2 alloys under cyclic loading has multi-focal character and is initiated from irregularities on the surface of the weld. The discrete nature of the change in the chemical composition of the weld metal along the axis of the weld is revealed. The weld is formed by alternating strips of connected alloys with width of 30...90 microns.

scholarly journals Innovate Method for Friction Stir Welding of Al-Mg-Si Alloy Thin Plate

2019 ◽  
Vol 269 ◽  
pp. 02006
Author(s):  
Li Fu ◽  
Fenjun Liu
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Base Metal ◽  
High Speed ◽  
Thick Plate ◽  
Welding Parameters ◽  
Butt Joints ◽  
Friction Stir ◽  
High Rotation Speed ◽  
Precipitated Phases

Al-Mg-Si (6061-T6) alloy with 0.8 mm thick plate was welded successfully by use of high speed friction stir welding (FSW) technology. The microstructural characteristics and mechanical property of the butt joints prepared by high speed FSW were analyzed in detail, the influence of welding parameters, fixture condition and after welding heat treatment were also explored. The results shown that sound surface topography and defect-free bonding interface were observed in the nugget zone (NZ). The microhardness of the as-welded joint was lower than that of the base metal because of the welding heat effect. Compared with the conventional speed FSW, the number of β-Mg2Si, Al2CuMg and Al8Fe2Si precipitated phases existed in the high speed FSWed NZ increased, which made the microhardness in the NZ improved significantly. The rod-shaped precipitates (Mg2Si) have the greatest influence on the microhardness distributions. The maximum tensile strength of 301.8 MPa, which was 85.8% of the base metal, was obtained at high rotation speed of 8000 rpm and fast welding speed of 1500 mm/min. The tensile strength of the ultra-high speed FSWed butt joints were improved significantly by post-weld artificial aging, with a maximum joint efficiency of 90.4%.

Experimental investigation of tensile strength of friction stir welded butt joints on PMMA

2018 ◽  
Vol 17 ◽  
pp. 238-245 ◽  
Author(s):  
Mohammad Reza Adibeig ◽  
Soran Hassanifard ◽  
Farid Vakili-Tahami ◽  
Jesper Henri Hattel
Keyword(s):  
Experimental Investigation ◽  
Tensile Strength ◽  
Butt Joints ◽  
Friction Stir

scholarly journals Mechanical and microstructural characterization of ST 37 butt joints by friction stir

2018 ◽  
Vol 159 ◽  
pp. 02037
Author(s):  
Kasir ◽  
Sulardjaka
Keyword(s):  
Tensile Strength ◽  
Base Material ◽  
Microstructural Characterization ◽  
Rolled Plate ◽  
Cnc Milling ◽  
Butt Joints ◽  
Friction Stir ◽  
Cnc Milling Machine ◽  
Microstructure Characteristic

The aim of this research is to investigate mechanical and microstructure characteristic of ST 37 Friction Stir Welded (FSW) butt joints. The rolled plate of ST 37 steel was used as the base material. Tungsten carbide (20 mm on diameter) was used as the tool. The FSW process was conducted on a CNC milling machine. FSW joints were produced at 1500 and 2000 rpm of rotational speeds variation and the transverse speed is constan at 40 mm/min. Furthermore, the influence of rotational speed on the microstructure and mechanical properties of the joints were investigated based on parameters mentioned above. The tensile test was done based on JISZ 2241 standard. Microhardness was investigated based on ASTM E 384. Joint microstructure was also analyzed by optic microscopy. As a result, FSW joint at 2000 rpm tool rotation shows higher tensile strength, yield strength and percentage of elongation in compare to 1500 rpm rotaton speed. In addition, its tensile strength is about 5 % lower than Base Material (BM) which its ductility decreases up to 30 %.

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