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Additive manufacturing by laser powder bed fusion (LPBF) offers materialversatility, capability for complex geometries, and control of mechanicalproperties and microstructure. However, achieving high-quality output requiresprocess parameters that consider both local and global thermal gradients. Here,we propose a new scan pattern for mitigating part quality issues caused bynon-uniform heating and cooling. A nature-inspired design method is employed toderive a spiral pattern stemming from the predator-prey behavior, and a poweroptimization routine is applied to maintain constant melt pool depth. Comparingsimulated thermal histories for the spiral pattern to well-established zig-zagand helix scan patterns, we propose that the spiral pattern significantlyreduces the spatial variation of temperature across the scan area, while alarger area remains above a specified threshold temperature at the end of thescan. Consequently, the spiral pattern is promising for LPBF of crack-pronematerials, and for future optimization of LPBF overall.

A spiral laser scanning routine for powder bed fusion inspired by natural predator-prey behavior