Dislocation densities and intergranular stresses of plastically deformed austenitic steels

Heterogeneous plastic deformation behavior of oriented individual grains-family with respect to the tensile direction in austenitic steels was studied using electron back scatter diffraction (EBSD) and neutron diffraction (ND) measurements. The kernel averaged misorientation value determined by EBSD...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2019-01, Vol.743, p.32-39
Main Authors: Tomota, Y., Ojima, M., Harjo, S., Gong, W., Sato, S., Ungár, T.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Austenitic steel
CMWP method
Dislocation density
Electron back scatter diffraction
Electron backscatter diffraction
Grains
Intergranular stress
Misalignment
Neutron diffraction
Neutrons
Plastic deformation
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Summary:Heterogeneous plastic deformation behavior of oriented individual grains-family with respect to the tensile direction in austenitic steels was studied using electron back scatter diffraction (EBSD) and neutron diffraction (ND) measurements. The kernel averaged misorientation value determined by EBSD for a plastically deformed specimen was different in grain to grain, suggesting different dislocation densities. Such insights obtained from the surface observations with EBSD were quantitatively evaluated as bulk-averaged data using ND. The convolutional multiple whole profile fitting (CMWP) for ND profiles has revealed different dislocation densities in oriented grains-families, showing good coincidence with the EBSD results in trend.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2018.09.052