Microstructure evolutions after friction stir welding of severely deformed aluminum sheets

2012 ◽  
Vol 40 ◽  
pp. 364-372 ◽  
Author(s):  
M. Sarkari Khorrami ◽  
M. Kazeminezhad ◽  
A.H. Kokabi
Keyword(s):  
Friction Stir Welding ◽  
Friction Stir ◽  
Aluminum Sheets

scholarly journals Design and Fabrication of Friction Stir Welding End-Effector for an ABB IRB1410 Robot

2016 ◽  
Vol 5 (2) ◽  
pp. 98
Author(s):  
Santosh Vanama
Keyword(s):  
Friction Stir Welding ◽  
High Strength ◽  
Fusion Welding ◽  
Fusion Temperature ◽  
End Effector ◽  
Friction Stir ◽  
Aluminum Sheets ◽  
Operation Pressure ◽  
Welding Processes ◽  
Tool Rotation

<p>The paper propose modelling and fabrication of friction stir welding end-effector for ABB IRB1410 robot. A dynamically developing version of pressure welding processes, join material without reaching the fusion temperature called friction stir welding. As friction stir welding occurs in solid state, no solidification structures are created thereby eliminating the brittle and eutectic phase’s common to fusion welding of high strength aluminium alloys. In this paper, Friction stir welding is applied to aluminum sheets of 2 mm thickness. A prototype setup is developed to monitor the evolution of main forces and tool temperature during the operation. Pressure of a gripper plays a major role for tool rotation and developing torque.  Fabrication of the tool has done. Force calculations are done by placing the sensors on the outer surface of gripper. Methods of evaluating weld quality are surveyed as well.</p>

scholarly journals Thermal Parametric Study of Butt Joints Using Friction Stir Welding

2021 ◽  
Vol 23 (12) ◽  
pp. 285-290
Author(s):  
Irshad Gulzar ◽  
◽  
Dr. Manish Kumar Gupta ◽  
Keyword(s):  
Friction Stir Welding ◽  
Mechanical Response ◽  
Performance Indicator ◽  
Fatigue Behavior ◽  
Testing Machine ◽  
Load Ratio ◽  
Constant Load ◽  
Industrial Applications ◽  
Friction Stir ◽  
Aluminum Sheets

The purpose of this study is to look at the mechanical and microstructural properties of dissimilar 2024 and 7075 aluminum sheets that have been welded together using friction stir welding (FSW). The two sheets, which were aligned with perpendicular rolling directions, were successfully fused; the welded sheets were then tested under strain at room temperature to determine the mechanical response to the materials for the parents Since the fatigue behavior of light metals is known, the fatigue endurance (S–N) curves of welded joints have been achieved. A resonant electro-mechanical testing machine load is the best performance indicator for a significant part of industrial applications; welded sheets is the best performance indicator for a big part of industrial applications. At a load frequency of around 75 Hz, a constant load ratio R = 0.1 was employed. The microstructure that formed as a result of the FSW Optical and scanning electron microscopy have been used to investigate the process, both on ‘as welded’ specimens and on tested specimens following a rupture

scholarly journals Butt Joining of Bi-Layered Aluminum Sheets through Friction Stir Welding: Tensile Stresses, Bending Stresses, Residual Stresses, and Fractrography

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 384 ◽  
Author(s):  
Hongyu Wei ◽  
Muhammad Tariq ◽  
Ghulam Hussain ◽  
Imran Khan ◽  
Muhammad Imran Khan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Friction Stir Welding ◽  
Bending Strength ◽  
Residual Stress Distribution ◽  
Flexural Properties ◽  
Butt Welding ◽  
Friction Stir ◽  
Aluminum Sheets ◽  
Bending Stresses

Laminated metals sheets have been used widely in various sectors including the optoelectronics, aerospace, ship, and automotive industries because of their desirable mechanical properties. Therefore, techniques for successful joining of such laminates are a focus of study. The objective of this study was to perform butt-welding of bi-layered aluminum laminated sheets using the friction stir welding (FSW) technique. The tensile properties, flexural properties, residual stress distribution, and fractured surfaces of the final weldments were analyzed. The effects of the process parameters on the mechanical properties of the weldments were also investigated. Mixing defects (voids and cracks) were observed in the stir zone (SZ) at the following combinations: low rotational speed (ω) and low tool traverse speeds (v) and also at high ω and high v, which substantially decreased the tensile and bending strength of the weldments as well as % elongation. Moreover, the sample welded at ω = 1500 rpm and v = 47.5 mm/min showed the best performance under mechanical loading: with a % elongation and tensile strength of 24.72% and 79.10 MPa, respectively. Similarly, the sample welded at ω = 750 rpm and v = 118 mm/min showed the highest flexural strength of 3.15 MPa. Finally, the suitable parameters are proposed for the joining of bi-layered aluminum laminated sheets.

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

2020 ◽  
Vol 17 (3) ◽  
pp. 8150-8159
Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Mechanical Performance ◽  
Fuel Efficiency ◽  
Research Work ◽  
Grain Structure ◽  
Tensile Fracture ◽  
Friction Stir ◽  
The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

Friction stir welding

2010 ◽  
Author(s):  
Daniela Lohwasser ◽  
Zhan Chen
Keyword(s):  
Friction Stir Welding ◽  
Friction Stir
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