Grain boundary character distribution of ductile L12-type Ni3Al intermetallic alloys

Naoya Masahashi, Shuji Hanada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Grain boundary structures of Ni3Al intermetallic alloys different in ductility are examined by electron back scattering pattern (EBSP) method. Special boundaries like Σ3 and Σ1 were observed frequently in these alloys, suggesting a correlation between the frequencies of these special boundaries and mechanical ductility. The frequency of these special boundaries become higher in the order as Ni75Al25 with boron, Ni76Al24 with boron, Ni75Al23Pd2, normal purity Ni76.5Al23.5 and high purity Ni76.5Al23.5. This order is independent of the order of ductility. The mechanism of ductilization in Ni3Al is discussed based on a chemical bonding effect in grain boundary vicinity applicable for boron-doped alloy and a grain boundary geometry effect for Pd doped and purified Ni3Al alloys.

Original languageEnglish
Pages (from-to)516-522
Number of pages7
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Issue number6
Publication statusPublished - 2000 Jun 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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