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Tensile properties and microstructure of inconel 718 fabricated with electron beam freeform fabrication (ebf(sup 3))
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hibberd, Joshua Bird, R. Keith |
| Copyright Year | 2009 |
| Description | Electron beam freeform fabrication (EBF3) direct metal deposition processing was used to fabricate two Inconel 718 single-bead-width wall builds and one multiple-bead-width block build. Specimens were machined to evaluate microstructure and room temperature tensile properties. The tensile strength and yield strength of the as-deposited material from the wall and block builds were greater than those for conventional Inconel 718 castings but were less than those for conventional cold-rolled sheet. Ductility levels for the EBF3 material were similar to those for conventionally-processed sheet and castings. An unexpected result was that the modulus of the EBF3-deposited Inconel 718 was significantly lower than that of the conventional material. This low modulus may be associated with a preferred crystallographic orientation resultant from the deposition and rapid solidification process. A heat treatment with a high solution treatment temperature resulted in a recrystallized microstructure and an increased modulus. However, the modulus was not increased to the level that is expected for Inconel 718. |
| File Size | 5006849 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090033142 |
| Archival Resource Key | ark:/13960/t55f3sx0z |
| Language | English |
| Publisher Date | 2009-09-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Heat Treatment Ductility Metallizing Rapid Quenching Metallurgy Crystallography Heat of Solution Tensile Strength Solidification Inconel Trademark Fabrication Electron Beams Yield Strength Deposition Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
