2017
DOI: 10.1016/j.actamat.2016.11.018
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Prediction of microstructure in laser powder bed fusion process

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Cited by 259 publications
(79 citation statements)
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“…The reasons are explained below: a large temperature gradient accompanied by temperature fluctuation in the exposed molten pool, which causes the density differences of fluids. The high‐temperature fluids with a low density inevitably rose; on the contrary, the low‐temperature fluids with a high density sank, which leads to convection of fluids in the molten pool . The heat flow remelts the previously formed columnar crystals and triggers them to peel off .…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The reasons are explained below: a large temperature gradient accompanied by temperature fluctuation in the exposed molten pool, which causes the density differences of fluids. The high‐temperature fluids with a low density inevitably rose; on the contrary, the low‐temperature fluids with a high density sank, which leads to convection of fluids in the molten pool . The heat flow remelts the previously formed columnar crystals and triggers them to peel off .…”
Section: Resultsmentioning
confidence: 99%
“…The high-temperature fluids with a low density inevitably rose; www.advancedsciencenews.com www.aem-journal.com on the contrary, the low-temperature fluids with a high density sank, which leads to convection of fluids in the molten pool. [33,34] The heat flow remelts the previously formed columnar crystals and triggers them to peel off. [23,35] The detached grains are engulfed into the molten pool and formed free grains, which may become the source of crystal nuclei in fine-grain zone (FGZ).…”
Section: Remelting Strategymentioning
confidence: 99%
“…MICRESS is based on the multiphase-field approach. [9,10] The multiphase-field theory describes the evolution of multiple phase-field parameters / a¼1;2;...;v ¼ ðx; tÞ (with the constraint P v a¼1 / a ¼ 1) in space and time, which represent the spatial distribution of multiple phases with different thermodynamic properties and/or multiple grains with different orientations. The phase-field parameter, / a takes a value of 1 if phase a is present locally and a value of 0 if the phase is not present locally.…”
Section: A Micress and The Governing Equationmentioning
confidence: 99%
“…The simulations of melt pool solidification in Ref. [36] are particularly interesting where an initial solid-liquid interface, similar to the resolidification boundary in our Fig. 3, resulted in local nucleation and growth of multiple dendrites with a misorientation with the vertical direction between 0 • to 20 • depending on the scan velocity, thermal gradient, interface roughness and initial seed position.…”
Section: Discussionmentioning
confidence: 52%