Abstract
This research investigates the multi-material laser powder bed fusion (MM-LPBF) printing of CuZr/316 L stainless steel (SS) within the same layer using four printing strategies. Printing CuZr first exhibits better quality. Conversely, printing 316 L SS first led to notable cracks due to elevated thermal stress and resulted in a larger diffusion zone due to material convection caused by the Marangoni effect. Material overlapping is effective in reducing the formation of cracks and creating a larger diffusion zone compared to non-overlapping. A topology-optimized liquid cooling heat sink with CuZr core and 316 L SS protective layer was printed to demonstrate electronic cooling applications.
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