Abstract
Achieving high-quality interfacial bonding between dissimilar alloys by additive manufacturing techniques is challenging due to their widely varying properties. Here, we fabricated 316L/CuSn10 bimetals with good bonding quality using laser powder bed fusion by optimizing the interface-layer process parameters. Thermodynamic calculations and EBSD analysis reveal that the cracks in the interface bonded region are mainly caused by residual stresses. Adjusting interface-layer process parameters can reduce the temperature gradient and relieve thermal stress in the interface bonded region, allowing successful fabrication. This work provides a new idea for fabricating multi-material structures utilizing additive manufacturing (AM) technologies, which is beneficial to promote the application of AM in the field of dissimilar alloys.
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