EBSD study of superplasticity: new insight into a well-known phenomenon

Mikhail Myshlyaev, Sergey Mironov, Galia Korznikova, Tatyana Konkova, Elena Korznikova, Ainur Aletdinov, Gulnara Khalikova, George Raab, Sheldon Lee Semiatin

Research output: Contribution to journalArticlepeer-review

Abstract

Electron backscatter diffraction (EBSD) was applied to investigate the superplastic behavior of a fine-grain Al-Mg-Li alloy. It was found that microstructural changes were noticeably influenced by the occurrence of continuous dynamic recrystallization. This mechanism involved a transverse subdivision of pre-elongated grains which eventually transformed into chains of nearly-equiaxed grains. A body of experimental observations, including extensive strain hardening, marked grain elongation, the formation of pronounced substructure in interior regions of grains, and the development of crystallographic texture, provided strong evidence of large amounts of intragranular slip operating during superplastic flow.
Original languageEnglish
Article number162949
Number of pages11
JournalJournal of Alloys and Compounds
Volume898
Early online date25 Nov 2021
DOIs
Publication statusE-pub ahead of print - 25 Nov 2021

Keywords

  • superplasticity
  • metals and alloys
  • electron backscatter diffraction (EBSD)
  • microstructure

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