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Effects of temperature and load on fretting fatigue induced geometrically necessary dislocation distribution in titanium alloy
- Source :
- Materials Science and Engineering: A. 800:140308
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The effects of temperature and load on fretting fatigue induced geometrically necessary dislocation (GND) distribution in titanium alloy are studied by electron back-scattered diffraction (EBSD) in this paper. Fretting fatigue experiments under different temperature and load in TC11 titanium alloy are carried out and samples with small cracks are obtained. With Hough-based EBSD, the misorientation and GND densities induced by fretting fatigue are analyzed in both crack formation zone and crack tip. The results show that in the crack formation zone and crack tip, both temperature and load have obvious effects on the GND densities. With the increase of temperature and load, the GND densities rise significantly, which agrees with the decreasing tendency of fretting fatigue lives. The peak positions of GND density agree well with the crack formation locations, indicating the close relation between GND concentration and fretting fatigue crack formation. The relationship between GND density and distance from the crack path is studied. The results of individual GND densities on each slip system show that ‘Pyramidal ' and ‘Screw ' dislocations compose a majority of total GND density.
- Subjects :
- Diffraction
Materials science
Misorientation
Mechanical Engineering
Titanium alloy
Fatigue testing
Fretting
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
020303 mechanical engineering & transports
Distribution (mathematics)
0203 mechanical engineering
Mechanics of Materials
General Materials Science
Composite material
Dislocation
0210 nano-technology
Electron backscatter diffraction
Subjects
Details
- ISSN :
- 09215093
- Volume :
- 800
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: A
- Accession number :
- edsair.doi...........8be2eb6ed1b4dd3a87ea24b2fb893517
- Full Text :
- https://doi.org/10.1016/j.msea.2020.140308