Phase equilibria and stability of the B2 phase in the Ni-Mn-Al and Co-Mn-Al systems

R. Kainuma, M. Ise, K. Ishikawa, Ikuo Ohnuma, K. Ishida

研究成果: Article

29 引用 (Scopus)

抜粋

The phase equilibria and ordering reactions in the composition region up to 50 at.% Al have been investigated in the Ni-Mn-Al and Co-Mn-Al systems at temperatures in the interval 850-1200°C mainly by the diffusion couple method. The compositions of the γ (A1: fcc-Ni, -Co, γ-Mn), γ′ (L12: Ni3Al), β (B2: NiAl, CoAl, NiMn), β-Mn (A13: β-Mn type), δ-Mn (A2: bcc-Mn) and ε (A3: hcp-(Mn, Al)) phases in equilibrium and the critical boundaries of the A2/B2 continuous ordering transition in the bcc phase region have been determined. It is shown that in the Mn-rich portion of the ternary systems both continuous and discontinuous A2 to B2 ordering transitions exist. The A2+B2 two-phase region in the isothermal sections has a lenticular shape and exists over a wide temperature range. The phase equilibria between the γ, γ′, β, β-Mn, δ-Mn and ε phases are presented and the stability of the ordered bcc aluminides is discussed.

元の言語English
ページ(範囲)173-180
ページ数8
ジャーナルJournal of Alloys and Compounds
269
発行部数1-2
DOI
出版物ステータスPublished - 1998 5 1

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

フィンガープリント Phase equilibria and stability of the B2 phase in the Ni-Mn-Al and Co-Mn-Al systems' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用