Effects of friction stir welding tool tilt angle on properties of Al-Mg-Si alloy T-joint

2021 ◽  
Vol 33 ◽  
pp. 264-276
Author(s):  
Hesamoddin Aghajani Derazkola ◽  
Naser Kordani ◽  
Hamed Aghajani Derazkola
Keyword(s):  
Friction Stir Welding ◽  
Tilt Angle ◽  
Friction Stir ◽  
Tool Tilt Angle

INFLUENCE OF TOOL TILT ANGLE ON THE PROCESS CHARACTERISTICS OF FRICTION STIR WELDING

2020 ◽  
pp. 36-41
Author(s):  
S. Yu. Shachnev ◽  
G. G. Larin
Keyword(s):  
Friction Stir Welding ◽  
Tilt Angle ◽  
Thermal Characteristics ◽  
Technical Parameters ◽  
Friction Stir ◽  
Process Characteristics ◽  
Welding Joints ◽  
Tool Tilt Angle ◽  
The One ◽  
Non Destructive

The article is devoted to the one of the features of choosing the technical parameters of regime of friction stir welding. The tool tilt angle is the object of research. This parameter underlies the mechanism of the formation of welding joints. The methodology and the experiment’s results of determining the influence of the tool tilt angle from the power and thermal characteristics of the process of friction stir welding are presented in this work. Also there is a presentation of the results of the welded joints’ studies which were done by the non-destructive and destructive methods of control. The dependency of the tool tilt angle from the power and the temperature in the welding zone is defined on the basis of the received results.

scholarly journals Effect of the Tool Tilt Angle on the Heat Generation and the Material Flow in Friction Stir Welding

Metals ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 28 ◽  
Author(s):  
Narges Dialami ◽  
Miguel Cervera ◽  
Michele Chiumenti
Keyword(s):  
Friction Stir Welding ◽  
Tilt Angle ◽  
Material Flow ◽  
Friction Model ◽  
Rear Side ◽  
Friction Stir ◽  
Speed Up ◽  
Higher Temperature ◽  
Tool Tilt Angle ◽  
Angle Of Rotation

This work studies the effect of the tool tilt angle on the generated heat and the material flow in the work pieces joint by Friction Stir Welding (FSW). An apropos kinematic framework together with a two-stage speed-up strategy is adopted to simulate the FSW problem. The effect of tilt angle on the FSWelds is modeled through the contact condition by modifying an enhanced friction model. A rotated friction shear stress is proposed, the angle of rotation depending on the process parameters and the tilt angle. The proposed rotation angle is calibrated by the experimental data provided for a tilt angle 2.5°. The differences of generated heat and material flow for the cases of tool with tilt angle of 0° and 2.5° are discussed. It is concluded that due to the higher temperature, softer material and greater frictional force in the trailing side of the tool, the material flow in the rear side of the FSW tool with the title angle is considerably enhanced, which assists to prevent the generation of defect.

Development of a New Approach for Incorporating Tool Tilting in Friction Stir Welding

2013 ◽  
Vol 701 ◽  
pp. 378-381 ◽  
Author(s):  
Bilal Ghazanfar ◽  
Mokhtar Awang ◽  
Sajjad Raza Khan ◽  
Hasan Fawad
Keyword(s):  
Friction Stir Welding ◽  
Tilt Angle ◽  
Traverse Speed ◽  
Tool Geometry ◽  
New Approach ◽  
Friction Stir ◽  
Milling Machines ◽  
Vertical Milling Machine ◽  
Zero Degree ◽  
Tool Tilt Angle

Friction Stir Welding (FSW) is a simple process involving a rotating tool (with an extended pin) traversing on the joining line of the two work pieces leaving behind the required weld. Tool geometry (pin and shoulder), rotational speed, traverse speed, and tilt angle are important parameters which determine the resultant properties of weld. Milling machines due to rotating tool and traversing can be used as a method of doing laboratory scale FSW experiment. In cases where milling machines have a fixed head, limitation of zero degree tool tilt angle results in substantial defects (e.g. tunnel defect) in weldments. In this study a new approach is developed and adopted for overcoming this limitation of a fixed head vertical milling machine to incorporate the flexibility of tool tilt. The results for welding with and without this approach are presented along with discussion and conclusion.

scholarly journals An Experimental Analysis on Operating Parameter’s Influence on Friction Stir Welding/processing

2019 ◽  
Vol 8 (6) ◽  
pp. 5095-5098
Keyword(s):  
Friction Stir Welding ◽  
Tilt Angle ◽  
Experimental Analysis ◽  
Joint Effect ◽  
Tool Geometry ◽  
Friction Stir ◽  
Tool Tilt Angle ◽  
Basic Standard ◽  
Article Influence

This paper clarifies the basic standard and procedure of FSW. It consists all the specialized characteristic which influences the procedure and excellence of FSW joint. Effect on every form of joint setup is taken into consideration. All the methodological parts of FSW tool geometry and material of tool is taken. In this article influence of essential parameters like tool rpm, tool feed, tool tilt angle, downward command and tool depression time on joining quality has been calculated. Finally, the fields on which further more exploration can be carried out has been identified.

Effects of tool tilt angle on the in-process heat transfer and mass transfer during friction stir welding

2018 ◽  
Vol 125 ◽  
pp. 32-42 ◽  
Author(s):  
Shuai Zhang ◽  
Qingyu Shi ◽  
Qu Liu ◽  
Ruishan Xie ◽  
Gong Zhang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Friction Stir Welding ◽  
Tilt Angle ◽  
Friction Stir ◽  
Process Heat ◽  
Tool Tilt Angle

scholarly journals Influence of Tool Tilt Angle on Material Flow and Defect Generation in Friction Stir Welding of AA2219

2018 ◽  
Vol 68 (5) ◽  
pp. 512-518 ◽  
Author(s):  
Suresh Meshram ◽  
Madhusudhan Reddy
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
Tilt Angle ◽  
Material Flow ◽  
Critical Role ◽  
Welding Process ◽  
Fusion Welding ◽  
Friction Stir ◽  
Tool Tilt Angle ◽  
Welding Processes

Heat treatable aluminium alloy AA2219 is widely used for aerospace applications, welded through gas tungsten and gas metal arc welding processes. Welds of AA2219 fabricated using a fusion welding process suffers from poor joint properties or welding defects due to melting and re-solidification. Friction stir welding (FSW) is a solid-state welding process and hence free from any solidification related defects. However, FSW also results in defects which are not related to solidification but due to improper process parameter selection. One of the important process parameters, i.e., tool tilt angle plays a critical role in material flow during FSW, controlling the size and location of the defects. Effect of tool tilt angle on material flow and defects in FSW is ambiguous. A study is therefore taken to understand the role of tool tilt angle on FSW defects. Variation in temperature, forces, and torque generated during FSW as a result of different tool tilt angles was found to be responsible for material flow in the weld, controlling the weld defects. An intermediate tool tilt angle (1o-2o) gives weld without microscopic defect in 7 mm thick AA2219 for a given set of other process parameters. At this tool tilt angle, x-force, and Z- force is balanced with viscosity and the material flow strain rate sufficient for the material to flow and fill internal voids or surface defects in the weld.

Friction Stir Welding of Dissimilar AA7075-T6 to AZ31B-H24 Alloys

MRS Advances ◽  
2017 ◽  
Vol 2 (64) ◽  
pp. 4055-4063 ◽  
Author(s):  
D. Hernández-García ◽  
R. Saldaña-Garcés ◽  
F. García-Vázquez ◽  
E.J. Gutiérrez-Castañeda ◽  
R. Deaquino-Lara ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Ultimate Tensile Strength ◽  
Tilt Angle ◽  
Welding Speed ◽  
Rotational Speed ◽  
Joint Line ◽  
Friction Stir ◽  
Tool Offset ◽  
Tool Tilt Angle

AbstractIn the present investigation, AA7075-T6 alloys and AZ31B-H24 were joined by the FSW process using the following range of parameters: rotational speed between 200 and 800 rpm, welding speed from 30 to 60 mm/min and a tilt angle from 1° to 3°. In some cases, a tool offset of 1 mm was used into Mg-based alloy. The experimental results show that sound and good joints can be obtained by positioning the tool in the middle of the joint-line using a rotational speed of 200 rpm, a welding speed of 30 mm/min and a tool tilt angle of 1°. The hardness and ultimate tensile strength in the stir zone were 122 Hv and 61.35 MPa, respectively. Also, it is important to mention that the Al3Mg2 and Al12Mg17 intermetallics compounds were observed in the this zone besides some defects like cavities and tunnel.

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