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Anelastic deformation of boron fibers. [vapor deposited fibers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dicarlo, J. A. |
| Copyright Year | 1975 |
| Description | The flexural deformation behavior of vapor-deposited boron fibers was examined from 100 to 1100 K by stress-relaxation and internal friction techniques. Only strong thermally-activated anelasticity was observed with no evidence of plasticity up to surface strains of 0.006. The parameters governing the relaxation processes within the anelastic spectra of as-received and annealed fibers were determined. These parameters were correlated with X-ray structure studies to develop preliminary models for the sources of boron's anelasticity. The large relaxation strengths of the dominant Ia processes coupled with their relaxation times and energies suggest a sliding mechanism between certain basic structural subunits common to both the beta-rhombohedral and vapor-deposited boron structures. |
| File Size | 725459 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750015625 |
| Archival Resource Key | ark:/13960/t3130nm78 |
| Language | English |
| Publisher Date | 1975-04-03 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Boron Stress Relaxation Vapor Deposition Fiber Strength Internal Friction Anelasticity Elastic Deformation X Ray Analysis Relaxation Time Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
