Additive manufacturing (AM) is a promising approach to fabricating multi- and dual-materials with design flexibility and a strong interface. The hybrid AM, which includes wire-based and powder-based deposition techniques, further facilitates manufacturing dual materials to achieve high deposition efficiency and feature resolution. However, the literature has scarcely reported dual material fabrication through the hybrid AM. The present study attempts to fill this research gap. In this study, depositions of SS316 via wire laser additive manufacturing (WLAM) and IN718 via powder laser additive manufacturing (PLAM) were performed to fabricate the dual material samples in two different configurations. The microstructural analysis of the samples revealed suitable phases in all the configurations. On the other hand, the compression test at 600 ºC and the microhardness test determined the superior configuration of depositing the dual material for enhanced mechanical performance. This work illustrates that the hybrid AM technology is not just competent but holds significant potential for fabricating SS316-IN718 dual material components, wherein the former material is required for toughness, and the latter is required to sustain the high-temperature loading conditions. The current work successfully demonstrated the process feasibility and material compatibility, and it acts as a foundational step for a systematic exploration of hybrid DED processes to tailor dual material structures/components.

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A Study on Fabricating SS316-IN718 Dual Material Through Hybrid Wire-Laser and Powder-Laser Directed Energy Deposition

  • Deepak Mudakavi,
  • Harshal Kulkarni,
  • Vinayaka E. Bodur,
  • Somashekara M. Adinarayanappa

摘要

Additive manufacturing (AM) is a promising approach to fabricating multi- and dual-materials with design flexibility and a strong interface. The hybrid AM, which includes wire-based and powder-based deposition techniques, further facilitates manufacturing dual materials to achieve high deposition efficiency and feature resolution. However, the literature has scarcely reported dual material fabrication through the hybrid AM. The present study attempts to fill this research gap. In this study, depositions of SS316 via wire laser additive manufacturing (WLAM) and IN718 via powder laser additive manufacturing (PLAM) were performed to fabricate the dual material samples in two different configurations. The microstructural analysis of the samples revealed suitable phases in all the configurations. On the other hand, the compression test at 600 ºC and the microhardness test determined the superior configuration of depositing the dual material for enhanced mechanical performance. This work illustrates that the hybrid AM technology is not just competent but holds significant potential for fabricating SS316-IN718 dual material components, wherein the former material is required for toughness, and the latter is required to sustain the high-temperature loading conditions. The current work successfully demonstrated the process feasibility and material compatibility, and it acts as a foundational step for a systematic exploration of hybrid DED processes to tailor dual material structures/components.