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Texture-induced anisotropy in an inconel 718 alloy deposited using electron beam freeform fabrication
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Shenoy, R. Tayon, W. Bird, R. Hafley, R. Redding, M. |
| Copyright Year | 2014 |
| Description | A test block of Inconel (IN) 718 was fabricated using electron beam freeform fabrication (EBF(sup 3)) to examine how the EBF(sup 3) deposition process affects the microstructure, crystallographic texture, and mechanical properties of IN 718. Tests revealed significant anisotropy in the elastic modulus for the as-deposited IN 718. Subsequent tests were conducted on specimens subjected to a heat treatment designed to decrease the level of anisotropy. Electron backscatter diffraction (EBSD) was used to characterize crystallographic texture in the as-deposited and heat treated conditions. The anisotropy in the as-deposited condition was strongly affected by texture as evidenced by its dependence on orientation relative to the deposition direction. Heat treatment resulted in a significant improvement in modulus of the EBF(sup 3) product to a level nearly equivalent to that for wrought IN 718 with reduced anisotropy; reduction in texture through recrystallization; and production of a more homogeneous microstructure. |
| File Size | 255625 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150000561 |
| Archival Resource Key | ark:/13960/t6644r84t |
| Language | English |
| Publisher Date | 2014-08-24 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Metals And Metallic Materials Heat Treatment Computer Aided Manufacturing Electron Diffraction Backscattering Mechanical Properties Modulus of Elasticity Crystallography Inconel Trademark Textures Fabrication Heterogeneity Electron Beams Anisotropy Materials Tests Experimentation Microstructure Deposition Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
