Dislocation structure in rapidly solidified Mg97Zn 1Y2 alloy with long period stacking order phase

Mitsuhiro Matsuda, Shinji Ando, Minoru Nishida

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Dislocation structure in rapidly solidified Mg97Zn 1Y2 ribbon with the long period stacking order (LPSO) phase is investigated by conventional transmission electron microscopy. In the grain with the LPSO phase there are no a dislocations lying on the basal plane, and a number of c + a dislocations are visible. On the other hand, in the grain without the LPSO phase there are many straight a dislocations lying on the basal plane. These facts indicate that the critical resolved shear stress of the basal plane increases by the formation of the LPSO phase and the non-basal slip is activated by the prevention of the basal slip. In other words, the former directly contributes to the strengthening and the latter relates to the improvement of ductility with the increment of the number of the slip system. Therefore, it is concluded that the LPSO phase plays a unique role which overcomes the conflicting properties of strength and ductility in the mechanical property of the present alloy.

Original languageEnglish
Pages (from-to)361-364
Number of pages4
JournalMaterials Transactions
Volume46
Issue number2
DOIs
Publication statusPublished - Feb 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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