Effect of Welding Parameters on Microstructure and Tensile Properties of Friction Stir Welded 6061 AL Joints

2009 ◽  
Vol 618-619 ◽  
pp. 41-44 ◽  
Author(s):  
Ai Han Feng ◽  
Dao Lun Chen ◽  
Zong Yi Ma
Keyword(s):  
Tensile Properties ◽  
Welding Speed ◽  
Rotation Rate ◽  
Welding Parameters ◽  
Nugget Zone ◽  
Fine Needle ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
The Relationship ◽  
Tool Rotation

The present investigation is aimed at evaluating the influence of tool rotation rate and welding speed on the microstructure, tensile properties, and fracture mode of 6061 Al-T651 alloy after friction stir welding (FSW). TEM results revealed that in the nugget zone (NZ), FSW resulted in the dissolution of fine needle-shaped precipitates that previously existed in the base metal. At a given rotation rate of 1400rpm, the yield strength (YS) and ultimate tensile strength (UTS) of the welded joints increased with increasing welding speed from 200 to 600mm/min. However, the UTS of the joints was nearly independent of the rotation rate. Furthermore, the relationship between the hardness distribution and fracture location has also been identified.

scholarly journals Study on the Joining of Titanium and Aluminum Dissimilar Alloys by Friction Stir Welding

2011 ◽  
Vol 5 (1) ◽  
pp. 256-261 ◽  
Author(s):  
Yuhua Chen ◽  
Changhua Liu ◽  
Geping Liu
Keyword(s):  
Titanium Alloy ◽  
Shear Strength ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Rotation Rate ◽  
Influence Of Process Parameters ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
Tool Rotation

Titanium alloy TC1 and Aluminum alloy LF6 were butt jointed and lap jointed by friction stir welding (FSW), and the influence of process parameters on formation of weld surface, cross-section morphology and strength were studied. The results show that, Titanium and Aluminum dissimilar alloy is difficult to be butt joined by FSW, and some defects such as cracks and grooves are easy to occur. When the tool rotation rate is 950 r/min and the welding speed is 118 mm/min, the tensile strength of the butt joint is 131MPa which is the highest. FSW is suitable for lap joining of TC1 Titanium alloy and LF6 Aluminum alloy dissimilar materials, an excellent surface appearance is easy to obtain, but the shear strength of the lap welding joint is not high. At the welding speed of 60 mm/min and the tool rotation rate of 1500 r/min, the lap joint has the largest shear strength of 48 MPa. At the welding speed of 150 mm/min and the tool rotation rate of 1500 r/min, crack like a groove occurs on the interface and the shear strength is zero.

scholarly journals Effect of Selected Friction Stir Welding Parameters on Mechanical Properties of Joints

2019 ◽  
Vol 65 (4) ◽  
pp. 51-62 ◽  
Author(s):  
P. G. Kossakowski ◽  
W. Wciślik ◽  
M. Bakalarz
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Short Description ◽  
Weld Strength ◽  
Welding Parameters ◽  
Technological Parameters ◽  
Friction Stir ◽  
Material Hardness ◽  
Tool Rotation

AbstractThe article discusses the basic issues related to the technology of friction stir welding (FSW). A short description of technology is provided. The following section provides the analysis of effect of technological parameters (tool rotation and welding speed) on the mechanical properties of the prepared joint (strength, ductility, microhardness). In both cases the analysis refers to aluminum alloys (6056 and AA2195-T0). The comparative analysis showed the phenomenon of the increase in weld strength along with the increase in the rotational speed of the tool during welding. Similarly, with the increase in welding speed, an increase in weld strength was observed. Some exceptions have been observed from the above relations, as described in the article. In addition, examples of material hardness distribution in the joint are presented, indicating their lack of symmetry, caused by the rotational movement of the tool. The analyses were performed basing on the literature data.

Study the Role of Friction Stir Welding Tilt Angle on Microstructure and Hardness

2015 ◽  
Vol 799-800 ◽  
pp. 434-438 ◽  
Author(s):  
H.A.D. Hamid ◽  
A.A. Roslee
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Tilt Angle ◽  
Welding Speed ◽  
Rotation Speed ◽  
Welding Parameters ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Pin ◽  
Tool Rotation

This paper presents an investigation of research objectives on the effect of tilt angle on microstructure and mechanical properties of dissimilar aluminum alloy sheets between AA5083 and AA6061, 5mm plates by using Friction Stir Welding (FSW) process in butt joint. The base materials of AA5083 and AA6061 were located on the retreating side (RS) and advancing side (AS), respectively. The welding process and the welding parameters such as tool pin profile, tool rotation speed, welding speed and tilt angle influenced the mechanical properties of the Friction Stir Welding joints significantly. For this experiment, the Friction Stir Welding materials joined under five different tilt angles (from 0oto 4o) with 86mm/min of welding speed and 910 rpm of tool rotation speed which were set similarly. Microscopic examination on the weld samples showed significant variation in the microstructure especially in the region of heat-affected zone (HAZ), weld nugget or dynamically recrystallized zone (DXZ) and in the base metal.

scholarly journals Influence of Welding Speed on Fracture Toughness of Friction Stir Welded AA2024-T351 Joints

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Miodrag Milčić ◽  
Dragan Milčić ◽  
Tomaž Vuherer ◽  
Ljubica Radović ◽  
Igor Radisavljević ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Welding Speed ◽  
Fracture Behavior ◽  
Welded Joint ◽  
Rotation Speed ◽  
High Reliability ◽  
Welding Parameters ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

In order to ensure a quality welded joint, and thus safe operation and high reliability of the welded part or structure achieved by friction stir welding, it is necessary to select the optimal welding parameters. The parameters of friction stir welding significantly affect the structure of the welded joint, and thus the mechanical properties of the welded joint. Investigation of the influence of friction stir welding parameters was performed on 6-mm thick plates of aluminum alloy AA2024 T351. The quality of the welded joint is predominantly influenced by the tool rotation speed n and the welding speed v. In this research, constant tool rotation speed was adopted n = 750 rpm, and the welding speed was varied (v = 73, 116 and 150 mm/min). By the visual method and radiographic examination, imperfections of the face and roots of the welded specimens were not found. This paper presents the performed experimental tests of the macro and microstructure of welded joints, followed by tests of micro hardness and fracture behavior of Friction Stir Welded AA2024-T351 joints. It can be concluded that the welding speed of v = 116 mm/min is favorable with regard to the fracture behavior of the analysed FSW-joint.

Effect of tool rotation rate on constituent particles in a friction stir processed 2024Al alloy

2015 ◽  
Vol 160 ◽  
pp. 64-67 ◽  
Author(s):  
Somayeh Pasebani ◽  
Indrajit Charit ◽  
Rajiv S. Mishra
Keyword(s):  
Rotation Rate ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
Tool Rotation

scholarly journals STUDY OF EFFECT OF FRICTION STIR WELDING PARAMETERS ON IMPACT ENERGY OF AA7075-T6

2016 ◽  
Vol 54 (1) ◽  
pp. 99
Author(s):  
Duong Dinh Hao ◽  
Tran Hung Tra ◽  
Vu Cong Hoa
Keyword(s):  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Impact Energy ◽  
Welding Speed ◽  
Rotation Speed ◽  
Welding Parameters ◽  
Friction Stir ◽  
Notched Specimens ◽  
The Impact ◽  
Tool Rotation

The influences of the tool rotation speed (denoted w) and the welding speed (denoted v) on the impact energy at the representative zones in the friction stir welding (FSW) of AA7075-T6 were investigated. Here, the standard V–Notched specimens were applied in which the notches were addressed at the stirred zone (SZ), the heat affected zones (HAZ) in both the advancing side and the retreating side and the mixed zone (MZ). The experimental results showed that, in all cases, the lowest impact energy is located at the stirred zone and that energy seems to be increased from the SZ to the HAZ across the welding. Furthermore, it is also found that the impact energy is decreased when the ratio of rotation speed to welding speed (w/v) is increased. The microstructure, the temperature distribution, and the hardness in and around the welded zone were considered and discussed.

scholarly journals The influence of welding parameters on macrostructure and mechanical properties of Sc-modified AA2519-T62 FSW joints

2020 ◽  
Vol 7 ◽  
pp. 28
Author(s):  
Robert Kosturek ◽  
Lucjan Śnieżek ◽  
Janusz Torzewski ◽  
Marcin Wachowski
Keyword(s):  
Mechanical Properties ◽  
Welding Speed ◽  
Fatigue Testing ◽  
Rotation Speed ◽  
Low Cycle Fatigue ◽  
Welding Parameters ◽  
Cycle Fatigue ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

In this investigation, a 5 mm thick extrusion of AA2519-T62 alloy has been welded using friction stir welding method. The various sets of process parameters have been involved within the range of 400–1200 rpm tool rotation speed and 100–800 mm/min welding speed. Selected joints have been subjected to the macrostructure analysis, microhardness measurements, tensile and low cycle fatigue testing (at ε = 0.3%), and fractography analysis. It has been stated that imperfection-free macrostructure is obtained for welds produced with lowest welding speed: 100 mm/min and tool rotation speed within the range of 400–800 rpm. The highest joint efficiency (85%) has been obtained for the sample characterized by the presence of voids in the upper part of the stir zone. Considering macrostructure analysis and established mechanical properties of the joints, it may be concluded that the best set of welding parameters for AA2519-T62 is within the range of 600–800 rpm tool rotation speed with welding speed of 100 mm/min for used MX Triflute tool.

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