Cyclic deformation mechanisms of precipitation-hardened Inconel 718 superalloy

Cyclic deformation behavior of IN 718 fatigued at room temperature and 920 K was examined. A significant cyclic deformation softening was observed, and planar deformation bands were formed at both the temperatures. The coherent and ordered γ″ precipitates were observed to be sheared by dislocations...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2008-06, Vol.483, p.369-372
Main Authors: Xiao, L., Chen, D.L., Chaturvedi, M.C.
Format: Article
Language:English
Subjects:
Applied sciences
Cyclic deformation
Exact sciences and technology
Fatigue
Inconel 718 superalloy
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microstructure
Precipitation-hardened alloy
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Summary:Cyclic deformation behavior of IN 718 fatigued at room temperature and 920 K was examined. A significant cyclic deformation softening was observed, and planar deformation bands were formed at both the temperatures. The coherent and ordered γ″ precipitates were observed to be sheared by dislocations moving on {1 1 1} slip planes. A model describing the formation of planar slip bands is given.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2006.10.181