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作者：Charles, Dan; Stokstad, Erik
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作者：Gellers, Joshua C.
作者单位：State University System of Florida; University of North Florida
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作者：Park, Taejin; Choi, Young Rae; Ko, Yekang; Kim, Nahee; Oh, Dongpil; Moores, Nial
作者单位：State University System of Florida; Florida International University; University of Oregon
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作者：Perren, Lara; Yarema, Maksym
作者单位：Swiss Federal Institutes of Technology Domain; ETH Zurich
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作者：Gellers, Joshua C.
作者单位：State University System of Florida; University of North Florida
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作者：Sheeran, William M.; Donaldson, Zoe R.
作者单位：University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Anschutz Medical Campus; University of Colorado System; University of Colorado Boulder
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作者：Brainard, Jeffrey
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作者：Fan, Xianqiang; Fleming, Tristan G.; Clark, Samuel J.; Fezzaa, Kamel; Getley, Anna C. M.; Marussi, Sebastian; Wang, Hongze; Leung, Chu Lun Alex; Kao, Andrew; Lee, Peter D.
作者单位：University of London; University College London; Queens University - Canada; United States Department of Energy (DOE); Argonne National Laboratory; Shanghai Jiao Tong University; Shanghai Jiao Tong University; University of Greenwich
摘要：Keyhole instability during laser welding and laser powder bed fusion (LPBF) can cause keyhole collapse and pore formation. Using high-speed x-ray imaging, we demonstrate that the flow vortex-induced protrusion on the rear keyhole wall is crucial in initiating keyhole instability. Applying a transverse magnetic field suppresses the keyhole instability by driving a secondary thermoelectric magnetohydrodynamics (TEMHD) flow that alters the net flow vortex. This minimizes protrusions and large-amp...
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作者：Paul, Avraneel
作者单位：University of Alabama System; University of Alabama Birmingham
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作者：Ravindran, Sandeep
