Dr. Jessica Buckner
,
Sandia National Laboratories, Albuquerque, NM
Dr. Jay Carroll
,
Sandia National Laboratories, Albuquerque, NM
Dr. Hannah Sims
,
Sandia National Laboratories, Albuquerque, NM
Mr. Austin Olivier
,
Sandia National Laboratories, Albuquerque, NM
Dr. Brett Roper
,
Sandia National Laboratories, Albuquerque, NM
Mr. Austin Pisani
,
Sandia National Laboratories, Albuquerque, NM
Mr. J. Herrmann
,
Sandia National Laboratories, Albuquerque, NM
Zachary Casias
,
Sandia National Laboratories, Albuquerque, NM
Mr. Stephen Spiak
,
Sandia National Laboratories, Albuquerque, NM
Titanium alloys are an attractive class of materials due to their excellent corrosion resistance and high strength to density ratio. Titanium alloys are widely studied for use in additive manufacturing, where the unique phase transformations can be leveraged in design. In particular, the alpha-beta alloy Ti-6Al-4V (Ti-64) and metastable beta alloy Ti-5Al-5Mo-5V-3Cr (Ti-5553) are of interest. Ti-5553 offers higher hardenability than Ti-64 and solidification as beta phase with quick cooling processes, and Ti-64 shows versatility of mechanical properties and is backed by significantly more research in the public domain. Different printing processes, e.g. laser powder bed fusion or directed energy deposition, impart different thermal histories, therefore modifying the microstructural constituents present and resulting properties.
Furthermore, both fusion welding and heat treatment are practical post-processing options that can impact the final properties of the material. While it is ideal to integrate all features into a single AM part, limitations in build chamber size or design requirements can necessitate production of multiple parts with a secondary joining operation. For post-process heat treatment, it is well known that equivalent heat treatments on AM and conventionally manufactured material do not produce equivalent results.
This presentation documents recent characterization of titanium alloys built by laser powder bed fusion (Ti-64 and Ti-5553) and wire directed energy deposition (Ti-64) with various post-processing steps, including fusion welding, heat treatment, and hot isostatic pressing and their resulting effect on microstructure, tensile, and fatigue performance.
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
