Characterizing dislocation configurations and their evolution during creep of a new 12% Cr steel

S.D. Yadav, M. EI-Tahawy, Szilvia Kalácska, Mária Dománková, David Canelo Yubero, Maria Cecilia Poletti

Research output: Contribution to journalArticleResearchpeer-review

Abstract

In this research, different types of dislocations are characterized and quantified in a newly developed 12% Cr steel in as-received as well as in crept conditions. X-ray diffraction (XRD) patterns are analyzed using three different models. The dislocation densities are determined employing the Convolution Multiple Whole Profile (CMWP) fitting, the analysis of the asymptotic part of the X-ray line profile (Groma's method), and the Rietveld refinement coupling Popa's and Williamson-Smallman approaches. CMWP method is used to measure the internal dislocation density inside the subgrains consisting of mobile and dipole dislocations, and the results show good agreement with Transmission Electron Microscopy (TEM) measurements. Groma's method is used to evaluate the total dislocation density, with results comparable to those obtained from the combination of Electron Backscatter Diffraction (EBSD) and TEM. Rietveld method gives the internal dislocation density or mobile dislocation density depending on the model chosen. The experimentally determined results such as creep strain, dislocation densities and subgrain size are compared with theoretical predictions and they are found in good agreement.
LanguageEnglish
Pages387-397
JournalMaterials characterization
Volume134
StatusPublished - Dec 2017

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Steel
Convolution
Creep
steels
Transmission electron microscopy
Rietveld method
Rietveld refinement
configurations
Dislocations (crystals)
Electron diffraction
Diffraction patterns
X ray diffraction
X rays
convolution integrals
transmission electron microscopy
x rays
diffraction patterns
dipoles
profiles
predictions

Cite this

Yadav, S. D., EI-Tahawy, M., Kalácska, S., Dománková, M., Canelo Yubero, D., & Poletti, M. C. (2017). Characterizing dislocation configurations and their evolution during creep of a new 12% Cr steel. Materials characterization, 134, 387-397.

Characterizing dislocation configurations and their evolution during creep of a new 12% Cr steel. / Yadav, S.D.; EI-Tahawy, M.; Kalácska, Szilvia; Dománková, Mária ; Canelo Yubero, David; Poletti, Maria Cecilia.

In: Materials characterization, Vol. 134, 12.2017, p. 387-397.

Research output: Contribution to journalArticleResearchpeer-review

Yadav, SD, EI-Tahawy, M, Kalácska, S, Dománková, M, Canelo Yubero, D & Poletti, MC 2017, 'Characterizing dislocation configurations and their evolution during creep of a new 12% Cr steel', Materials characterization, vol. 134, pp. 387-397.
Yadav SD, EI-Tahawy M, Kalácska S, Dománková M, Canelo Yubero D, Poletti MC. Characterizing dislocation configurations and their evolution during creep of a new 12% Cr steel. Materials characterization. 2017 Dec;134:387-397.
Yadav, S.D. ; EI-Tahawy, M. ; Kalácska, Szilvia ; Dománková, Mária ; Canelo Yubero, David ; Poletti, Maria Cecilia. / Characterizing dislocation configurations and their evolution during creep of a new 12% Cr steel. In: Materials characterization. 2017 ; Vol. 134. pp. 387-397.
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