Additive Manufacturing of SS316L/IN718 Bimetallic Structure via Laser Powder Bed Fusion

Asif Mahmud; Nicolas Ayers; Thinh Huynh; Yongho Sohn

doi:10.3390/ma16196527

Additive Manufacturing of SS316L/IN718 Bimetallic Structure via Laser Powder Bed Fusion

Materials (Basel). 2023 Oct 1;16(19):6527. doi: 10.3390/ma16196527.

Authors

Asif Mahmud¹, Nicolas Ayers¹, Thinh Huynh¹, Yongho Sohn¹

Affiliation

¹ Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA.

Abstract

Laser powder bed fusion (LPBF) is a popular additive manufacturing (AM) technique that has demonstrated the capability to produce sophisticated engineering components. This work reports the crack-free fabrication of an SS316L/IN718 bimetallic structure via LPBF, along with compositional redistribution, phase transformations and microstructural development, and nanohardness variations. Constituent intermixing after LPBF was quantitatively estimated using thermo-kinetic coefficients of mass transport and compared with the diffusivity of Ni in the austenitic Fe-Ni system.

Keywords: bimetallic structure; constituent intermixing; laser powder bed fusion.

Grants and funding

This research article was sponsored by the DEVCOM Army Research Laboratory under a cooperate agreement contract (W911NF1720172).