Effect of solute atoms on fracture toughness in dilute magnesium alloys

Hidetoshi Somekawa, Tadanobu Inoue, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The effect of alloying elements on the toughness and the fracture behaviour was investigated on seven kinds of Mg-0.3 at.% X (X= Ag, Al, Ca, Pb, Sn, Y and Zn) alloys with a grain size of 3-5 μm. The fracture toughness and fracture behaviour in magnesium alloys were closely related to the segregation energy. The Mg-Al and -Zn alloys that had small segregation energy showed high toughness and ductile fracture in most regions, while the Mg-Ca alloy with large segregation energy exhibited low toughness and intergranular fracture. These different tendencies resulted from solute segregation at grain boundaries (GBs). The change in the lattice parameter ratio was the influential material parameter regardless of whether the GB embrittlement was for enhancement or suppression.

Original languageEnglish
Pages (from-to)4582-4592
Number of pages11
JournalPhilosophical Magazine
Volume93
Issue number36
DOIs
Publication statusPublished - Dec 1 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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