TY - GEN
T1 - Effects of using an external electromagnetic force on transport phenomena and weld quality in laser welding
AU - Zhou, Jun
AU - Tsai, Hai Lung
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - Welding defects such as undercuts, porosity, irregular beads are frequently observed in laser welds due to the fast cooling rate and no filler metal addition in the process. In addition, increasing penetration depth is a challenging issue in laser welding. Some preliminary experimental studies indicated that applying electromagnetic force in laser welding could be an effective solution to some of these problems. However, the underlying physics behind this electro-magnetically assisted laser welding is not clear and needs further investigation. In this paper, mathematical models are used to study the transport phenomena, such as heat transfer and melt flow, in both spot and 3-D electro-magnetically assisted laser welding. Studies are focused on understanding the effects of electromagnetic forces on heat generation and transfer, weld pool dynamics, cooling and solidification, porosity prevention, weld shape control, and penetration depth.
AB - Welding defects such as undercuts, porosity, irregular beads are frequently observed in laser welds due to the fast cooling rate and no filler metal addition in the process. In addition, increasing penetration depth is a challenging issue in laser welding. Some preliminary experimental studies indicated that applying electromagnetic force in laser welding could be an effective solution to some of these problems. However, the underlying physics behind this electro-magnetically assisted laser welding is not clear and needs further investigation. In this paper, mathematical models are used to study the transport phenomena, such as heat transfer and melt flow, in both spot and 3-D electro-magnetically assisted laser welding. Studies are focused on understanding the effects of electromagnetic forces on heat generation and transfer, weld pool dynamics, cooling and solidification, porosity prevention, weld shape control, and penetration depth.
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U2 - 10.1115/HT2012-58256
DO - 10.1115/HT2012-58256
M3 - Conference contribution
AN - SCOPUS:84892649320
SN - 9780791844779
T3 - ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
SP - 937
EP - 942
BT - ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
T2 - ASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
Y2 - 8 July 2012 through 12 July 2012
ER -