Imperial College London
Alternate

Dr Catrin Mair Davies

Faculty of Engineering, Department of Mechanical Engineering

Reader in Structural Integrity of Alloys
 
 
 
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Contact

 

+44 (0)20 7594 7035catrin.davies

 
 
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Location

 

517UnknownSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ahn:2018:10.1016/j.jmapro.2018.05.028,
author = {Ahn, J and Chen, L and He, E and Dear, JP and Davies, C},
doi = {10.1016/j.jmapro.2018.05.028},
journal = {Journal of Manufacturing Processes},
title = {Optimisation of process parameters and weld shape of high power Yb-fibre laser welded 2024-T3 aluminium alloy},
url = {http://dx.doi.org/10.1016/j.jmapro.2018.05.028},
volume = {34},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A novel approach to welding crack sensitive 2024 aluminium alloy was made by using fibre laser. Bead on plate welding of 3mm thick sheets of 2024-T3 was performed to determine the optimum sets of welding parameters including laser power, welding speed, power density and focal position, which meet the quality and specification requirements of aircraft structures. A correlation between these parameters and weld shape, microstructure, and defects was found. The weld quality was assessed in terms weld-seam geometry, root to width ratio, surface appearance, penetration depth, microstructure and defects. Microstructural analysis was performed using optical microscopy, scanning electron microscopy and energy dispersive spectroscopy. The parametric optimisation was conducted to obtain crack and porosity free full penetration welds with ideal sized face and root width or weld shape, and a minimal amount of undercut, underfill and reinforcement. While high-quality welds were produced, in some cases, micro-cracks less than 0.5mm were observed in the weld metal as optimising the parameters only had a limited effect on completely shifting the crack sensitive composition. The addition of filler metal with a different chemistry was found to be also necessary to adjust the composition to a less crack sensitive range.
AU  - Ahn,J
AU  - Chen,L
AU  - He,E
AU  - Dear,JP
AU  - Davies,C
DO  - 10.1016/j.jmapro.2018.05.028
PY  - 2018///
SN  - 1526-6125
TI  - Optimisation of process parameters and weld shape of high power Yb-fibre laser welded 2024-T3 aluminium alloy
T2  - Journal of Manufacturing Processes
UR  - http://dx.doi.org/10.1016/j.jmapro.2018.05.028
UR  - http://hdl.handle.net/10044/1/60371
VL  - 34
ER  -
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