Evolution of the dislocation structure during compression in a Mg–Zn–Y alloy with long period stacking ordered structure

Kristian Máthis, Moustafa El-Tahawy, Gerardo Garcés, J. Gubicza

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Evolution of the dislocation structure in Mg97Y7Zn5(at. %) alloy having long period stacking ordered (LPSO) structure was studied during compression tests. Two materials, an as-cast and an extruded one were deformed up to the applied strain of ~25%. The evolution of the crystallite size, the dislocation density and the population of the particular slip systems were determined by the evaluation of the X-ray diffraction peak profiles. A very low dislocation density with the order of magnitude 1012–1013m−2was detected in the compressed specimens. This dislocation density did not increase considerably with increasing strain. At the same time, a significant decrease of the crystallite size occurred during compression. These observations can be explained by the arrangement of dislocations into low energy dipolar configurations, such as kink walls, which do not contribute to the dislocation density measurable by X-ray diffraction peak profile analysis, however they yield a fragmentation of the crystallites.

Original languageEnglish
Title of host publicationMagnesium Technology 2018
PublisherSpringer International Publishing
Pages385-389
Number of pages5
ISBN (Print)9783319723310
DOIs
Publication statusPublished - Jan 1 2018
EventInternational Symposium on Magnesium Technology, 2018 - Phoenix, United States
Duration: Mar 11 2018Mar 15 2018

Publication series

NameMinerals, Metals and Materials Series
VolumePart F7
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Other

OtherInternational Symposium on Magnesium Technology, 2018
CountryUnited States
CityPhoenix
Period3/11/183/15/18

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Keywords

  • Diffraction line profile analysis
  • Dislocation density
  • LPSO structure
  • Non-basal slip

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Energy Engineering and Power Technology

Cite this

Máthis, K., El-Tahawy, M., Garcés, G., & Gubicza, J. (2018). Evolution of the dislocation structure during compression in a Mg–Zn–Y alloy with long period stacking ordered structure. In Magnesium Technology 2018 (pp. 385-389). (Minerals, Metals and Materials Series; Vol. Part F7). Springer International Publishing. https://doi.org/10.1007/978-3-319-72332-7_60