Abstract
Ti-6Al-4V lattice block structure panels were fabricated using an aerospace-quality investment casting process. Testing in compression, bending, and impact show that high strength, ductility, and energy absorption are achieved for both individual struts and full panels, despite the intricacies involved with casting fine struts (1.6 or 3.2 mm in diameter) from a highly reactive, poor-fluidity liquid titanium alloy. The panel stress-strain curve calculated by finite-element modeling correlates well with experimental results, indicating that the occasional defects, which are common to aerospace grade castings and may be present in the struts and nodes, have little detrimental effect on the overall panel compressive properties.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 441-449 |
| Number of pages | 9 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 39 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2008 |
Funding
This work was supported by NASA–Glenn Research Center through Contract No. NNC04CA14C with guidance and encouragement from Drs. S.A. Padula II, M.V. Nathal, and S.L. Bowman. The authors also acknowledge Professors S.A. Guralnick and S. Mostovoy (Illinois Institute of Technology) for use of, and help with, panel compressive testing equipment.
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys