Inconel 625 lattice structures manufactured by selective laser melting (SLM): Mechanical properties, deformation and failure modes

Journal
Materials and design  
Volume
157
Start Page
179
End Page
199
Citation
Materials and Design 157: 179-199 (2018-11-05)
Publisher DOI
10.1016/j.matdes.2018.06.010
Scopus ID
2-s2.0-85050279207
Publisher
Elsevier Science
Additive Manufacture (AM) enables the fabrication of highly complex lattice structures with exceptional engineering properties. Inconel is a technically useful material in that it provides high resistance to oxidisation, creep and loss of mechanical properties at elevated temperatures. The combination of Inconel material properties and the geometric freedom of AM provides a unique opportunity for the fabrication of engineered structures with exceptional strength and stiffness at elevated temperatures, as for example is required for high temperature turbomachinery. Despite the associated technical opportunities, there exists no design data on the mechanical response, deformation characteristics and failure modes of AM Inconel 625 lattice structures. This research provides a comprehensive reference for the mechanical response of Inconel 625 lattice structures fabricated by Selective Laser Melting (SLM). Furthermore, the high ductility of Inconel 625 lattice enables novel insight into the structural mechanics of AM lattice, and the associated deformation photography provides a reference for the validation and verification of numerical models of AM lattice behaviour.
Subjects
Additive manufacture
Design for additive manufacture (DFAM)
Inconel 625
Lattice structures
Selective laser melting (SLM)
DDC Class
600: Technik