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Instability in Single-Crystal Epitaxy during Laser Powder Bed Fusion Driven by Solidification Interface Morphology
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DOI：10.1016/j.addma.2026.105339.png)
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Abstract
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• Stray grain formation depends on solidification parameters magnitude-directionality competition. • Interface inclination controls stray grain formation site and growth direction. • Interface inclination determines cross-layer growth or truncation of stray grains. • Interface inclination induces horizontal orientation deviation and vertical GB formation. • Optimized melt pool geometry stabilizes single-crystal epitaxy in L-PBF
Keywords:
Laser powder bed fusion
Solidification interface morphology
Epitaxial growth
Nickel-based superalloys
Single crystal
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