heat loss through the tool in friction stir welding ashley lavin ken ross
Post on 22-Dec-2015
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![Page 1: Heat Loss Through the Tool in Friction stir welding Ashley Lavin Ken Ross](https://reader037.vdocuments.site/reader037/viewer/2022103022/56649d7d5503460f94a60423/html5/thumbnails/1.jpg)
Heat Loss Through the Tool in Friction stir welding
Ashley Lavin
Ken Ross
![Page 2: Heat Loss Through the Tool in Friction stir welding Ashley Lavin Ken Ross](https://reader037.vdocuments.site/reader037/viewer/2022103022/56649d7d5503460f94a60423/html5/thumbnails/2.jpg)
How Friction Stir Welding (FSW)Works
Pin
Downward force maintains pressure
Rotating tool creates friction and applies pressure
Direction of tool translation
![Page 3: Heat Loss Through the Tool in Friction stir welding Ashley Lavin Ken Ross](https://reader037.vdocuments.site/reader037/viewer/2022103022/56649d7d5503460f94a60423/html5/thumbnails/3.jpg)
Purpose
Determine the effect of tool material on the heat lost during FSW through the tool
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Materials
Tools with identical geometries were made from the following materials. Shafts are painted black to create a constant emissivity for the tool surface Tungsten k = 84.02 H-13 Tool Steel k= 28.6 Nickel Alloy (ALGxN) k=11.8
2m
kW
![Page 5: Heat Loss Through the Tool in Friction stir welding Ashley Lavin Ken Ross](https://reader037.vdocuments.site/reader037/viewer/2022103022/56649d7d5503460f94a60423/html5/thumbnails/5.jpg)
Procedure
Perform a weld using each of the tools at the same traverse and rotational speed and record the following Record temperature of the tool at the top and
bottom of the shaft using ThermaCam Record power input into the weld
Calculate the fraction of the total power lost to heat transfer through the tool using each material
![Page 6: Heat Loss Through the Tool in Friction stir welding Ashley Lavin Ken Ross](https://reader037.vdocuments.site/reader037/viewer/2022103022/56649d7d5503460f94a60423/html5/thumbnails/6.jpg)
Setup
Tool
ThermaCam
Workpiece
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Video of Weld(H-13 Tool)
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Analysis
)(/)( 12 ALTTkQtool
T1
T2
L
60
2 MRPMPower
PowerQQQ tooltotalTool //
Nomenclature
•k= thermal conductivity W/mK
•L= Length (m)
•T= temperature (Celsius)
•RPM= rotation per minute
•M=Torque (Nm)
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Results
Qloss = 217.17 W 60.62 W 22.87W
Qloss/Qtotal 10.0% 3.24% 0.85%
Where Qloss/Qtotal is percent of the total heat input into the weld lost though the tool
Tungsten H-13 NLGxN
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Conclusion
The ratio of heat lost through the tool correlates to the thermal conductivity of the tool material
-30.00
20.00
70.00
120.00
170.00
220.00
k Qloss Qloss/Qtot
Tungsten
H-13
NLGxN
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Questions
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Analysis Macro