Isometric tilt grain boundaries and solute segregation in a deformed Mg–Zn–Ca alloy

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Abstract

Solute segregation to grain boundaries is an essential phenomenon that affects multiple mechanical properties of magnesium alloys. In this work, the deformed microstructure in a Mg–Zn–Ca alloy that was compressed at room temperature has been examined by bright-field and high-angle annular dark-field scanning transmission electron microscopy. Domains made of nanograins have been observed in some local areas. These domains exhibit strong texture and most of the nanograins oriented with their being paralleled to each other, which is similar to those reported in the Mg–Gd alloy. The grain boundaries of these nanograins involve many isometric tilt boundaries containing twin boundaries. Segregation of Zn/Ca atoms occurs in these tilt boundaries in the cold deformed sample. The segregation forms unique and chemically ordered patterns specific to tilt boundaries.

Original languageEnglish
Title of host publicationMagnesium Technology, 2019
EditorsNeale R. Neelameggham, J. Brian Jordon, Dmytro Orlov, Vineet V. Joshi
PublisherSpringer
Pages263-266
Number of pages4
ISBN (Print)9783030057886
DOIs
Publication statusPublished - 1 Jan 2019
EventMagnesium Technology Symposium 2019 - San Antonio, United States of America
Duration: 10 Mar 201914 Mar 2019
https://link.springer.com/book/10.1007%2F978-3-030-05789-3 (Proceedings)

Publication series

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

Conference

ConferenceMagnesium Technology Symposium 2019
CountryUnited States of America
CitySan Antonio
Period10/03/1914/03/19
Internet address

Keywords

  • HAADF-STEM
  • Mg alloys
  • Solute segregation
  • Tilt boundary

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