Powder-size driven facile microstructure control in powder-fusion metal additive manufacturing processes

Shubham Chandra, Chengcheng Wang, Shu Beng Tor, Upadrasta Ramamurty and Xipeng Tan ()
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Shubham Chandra: Nanyang Technological University
Chengcheng Wang: Nanyang Technological University
Shu Beng Tor: Nanyang Technological University
Upadrasta Ramamurty: Nanyang Technological University
Xipeng Tan: National University of Singapore

Nature Communications, 2024, vol. 15, issue 1, 1-14

Abstract: Abstract Microstructure control in metal additive manufacturing is highly desirable for superior and bespoke mechanical performance. Engineering the columnar-to-equiaxed transition during rapid solidification in the additive manufacturing process is crucial for its technological advancement. Here, we report a powder-size driven melt pool engineering approach, demonstrating facile and large-scale control in the grain morphology by triggering a counterintuitive response of powder size to the additively manufactured 316 L stainless steel microstructure. We obtain coarse-grained (>100 μm) or near-monocrystalline microstructure using fine powders and near-equiaxed, fine-grained (

Date: 2024
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DOI: 10.1038/s41467-024-47257-w

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