Back to Search
Start Over
Slip-System-Related Dislocation Study from In-Situ Neutron Measurements
- Source :
- Metallurgical and Materials Transactions A. 39:3079-3088
- Publication Year :
- 2008
- Publisher :
- Springer Science and Business Media LLC, 2008.
-
Abstract
- A combined experimental/computational approach is employed to study slip-system-related dislocation-substructure formation during uniaxial tension of a single-phase, face-centered-cubic (fcc), nickel-based alloy. In-situ neutron-diffraction measurements were conducted to monitor the peak-intensity, peak-position, and peak-broadening evolution during a displacement-controlled, monotonic-tension experiment at room temperature. The measured lattice-strain evolution and the macrostress/macrostrain curves were used to obtain the material parameters required for simulating the texture development by a visco-plastic self-consistent (VPSC) model. The simulated texture compared favorably with experimentally-determined texture results over a range of 0 to 30 pct engineering strain. The grain-orientation-dependent input into the Debye-intensity ring was considered. Grains favorably oriented relative to the two detector banks in the geometry of the neutron experiment were indicated. For the favorably oriented grains, the simulated slip-system activity was used to calculate the slip-system-dependent, dislocation-contrast factor. The combination of the calculated contrast factor with the experimentally-measured peak broadening allows the assessment of the parameters of the dislocation arrangement within the specifically oriented grains, which has a quantitative agreement with the transmission-electron-microscopy results.
- Subjects :
- Structural material
Materials science
Metallurgy
Neutron diffraction
Detector
Alloy
Metals and Alloys
Mineralogy
chemistry.chemical_element
Slip (materials science)
engineering.material
Condensed Matter Physics
Condensed Matter::Materials Science
Nickel
chemistry
Mechanics of Materials
engineering
Neutron
Dislocation
Composite material
Subjects
Details
- ISSN :
- 15431940 and 10735623
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Metallurgical and Materials Transactions A
- Accession number :
- edsair.doi...........63dc9ffc1b479ed4dbb6869645a9343c