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- W4309299889 abstract "Spatially extended cellular and dendritic array structures forming during solidification processes such as casting, welding, or additive manufacturing are generally polycrystalline. Both the array structure within each grain and the larger scale grain structure determine the performance of many structural alloys. How those two structures coevolve during solidification remains poorly understood. By in situ observations of microgravity alloy solidification experiments onboard the International Space Station, we have discovered that individual cells from one grain can unexpectedly invade a nearby grain of different misorientation, either as a solitary cell or as rows of cells. This invasion process causes grains to interpenetrate each other and hence grain boundaries to adopt highly convoluted shapes. Those observations are reproduced by phase-field simulations further demonstrating that invasion occurs for a wide range of misorientations. Those results fundamentally change the traditional conceptualization of grains as distinct regions embedded in three-dimensional space." @default.
- W4309299889 created "2022-11-25" @default.
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- W4309299889 date "2022-11-15" @default.
- W4309299889 modified "2023-10-16" @default.
- W4309299889 title "Cell Invasion during Competitive Growth of Polycrystalline Solidification Patterns" @default.
- W4309299889 doi "https://doi.org/10.48550/arxiv.2211.08500" @default.
- W4309299889 hasPublicationYear "2022" @default.
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