J
Joseph Ahn
Researcher at Imperial College London
Publications - 17
Citations - 692
Joseph Ahn is an academic researcher from Imperial College London. The author has contributed to research in topics: Welding & Residual stress. The author has an hindex of 11, co-authored 15 publications receiving 410 citations.
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Additive manufacturing of Ti–6Al–4V parts through laser metal deposition (LMD): Process, microstructure, and mechanical properties
Abolfazl Azarniya,Abolfazl Azarniya,Xabier Garmendia Colera,Mohammad J. Mirzaali,Saeed Sovizi,F. Bartolomeu,k St Weglowski Mare,Wessel W. Wits,Chor Yen Yap,Joseph Ahn,Georgina Miranda,Filipe Samuel Silva,Hamid Reza Madaah Hosseini,Seeram Ramakrishna,Amir A. Zadpoor +14 more
TL;DR: In this paper, the authors present a critical analysis and overview of the relationship between processing parameters, microstructure, and mechanical properties of LMD components made from the Ti-6Al-4V alloy.
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Prediction and measurement of residual stresses and distortions in fibre laser welded Ti-6Al-4V considering phase transformation
TL;DR: In this paper, residual stresses and distortions due to time dependent and localised heating imposed during fiber laser welding a 2.0mm thick titanium alloy Ti-6Al-4V sheet were studied.
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The effect of Ar and He shielding gas on fibre laser weld shape and microstructure in AA 2024-T3
TL;DR: In this paper, the effect of using argon and helium shielding gas on weld quality, defect formation and microstructure of laser welded aluminium alloy 2024-T3 was investigated.
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Parametric optimisation and microstructural analysis on high power Yb-fibre laser welding of Ti–6Al–4V
TL;DR: In this article, thin sheets of Ti-6Al-4V were full penetration welded using a 5-kW fiber laser in order to evaluate the effectiveness of high power fiber laser as a welding processing tool for welding Ti−6Al−4V with the requirements of the aircraft industry and to determine the effect of welding parameters including laser power, welding speed and beam focal position on the weld microstructure, bead profile and weld quality.
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Effect of filler metal feed rate and composition on microstructure and mechanical properties of fibre laser welded AA 2024-T3
TL;DR: In this paper, the influence of filler wire feed rate on the weld quality and mechanical properties of high power 5kW laser welded aluminium alloy 2024-T3 was investigated using energy dispersive X-ray spectroscopy.