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Dynamic friction stresses in the γ phase of a nickel-based superalloy
Dynamic friction stresses in the γ phase of a nickel-based superalloy
- Source :
- Philosophical Magazine A. 79:2591-2602
- Publication Year :
- 1999
- Publisher :
- Informa UK Limited, 1999.
-
Abstract
- In-situ deformation experiments were performed on single crystals of the short-range-order-containing γ phase of a nickel-based superalloy. The dislocation pile-ups moving under stress are used as a probe exploring this complex solid solution and giving precise information on the local glide resistance encountered. Their analysis gives access for the first time to several contributions to this glide resistance. The threshold friction stress, which pile-ups must overcome in order to move is equal to the dynamic friction stress, which the pile-up experiences when propagating at a constant velocity. In comparison, the glide resistances deduced from the analysis of relaxed configurations are shown to be significantly underestimated. The softening effect due to the destruction of short-range order is also quantitatively determined.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
Deformation (mechanics)
Metallurgy
Metals and Alloys
Mechanics
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Superalloy
Stress (mechanics)
Phase (matter)
General Materials Science
Dynamical friction
Dislocation
Softening
Solid solution
Subjects
Details
- ISSN :
- 14606992 and 01418610
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- Philosophical Magazine A
- Accession number :
- edsair.doi...........53d99d91327121e494cb5f5637dd424f
- Full Text :
- https://doi.org/10.1080/01418619908212011