Wednesday  |  Phipps  |  09:40 AM–10:00 AM

#13288, The Effects of Topology and Base Materials on the Creep Rate of Inconel 625 FCCZ Lattices

Mechanical metamaterials have demonstrated great high strength, low-density properties ideal for addressing the high strength/low weight needs of the aerospace and outerspace industries. However, the high temperature properties of these metamaterials are not yet well enough understood to begin to use them in these applications. This study experimentally compares the creep rate of additively manufactured solid specimens and FCCZ lattices to determine the roles of base material and topology on the lattice creep rate and failure mechanisms. The lattice topology was shown to drive the creep deformation rate rather than the base material with nearly two orders of magnitude difference in the creep exponent of the lattice compared to the solid specimen. Final failure of the lattice occurred with buckling of the Z strut.

Kaitlynn Conway   Clemson University
Garrett Pataky   Clemson University
Thomas Berfield   University of Louisville
Hamid Torbati-Sarraf   Purdue University