Ductility enhancement in NiAl (B2)-base alloys by microstructural control

K. Ishida, R. Kainuma, N. Ueno, T. Nishizawa

Research output: Contribution to journalArticlepeer-review

208 Citations (Scopus)


An attempt to improve ductility of NiAl (B2)-base alloys has been made by the addition of alloying elements and the control of microstructure. It has been found that a small amount of fcc γ phase formed by the addition of Fe, Co, and Cr has a drastic effect not only on the hot workability but also on the tensile ductility at room temperature. The enhancement in ductility is mainly due to the modification of Β-phase grains by the coexistence of γ phase. The effect of alloying elements on the hot forming ability is strongly related to the phase equilibria and partition behavior among γ, γ′ (L12 structure), and Β phases in the Ni-Al-X alloy systems. The ductility-enhancement method shows promise for expanding the practical application of nickel aluminide.

Original languageEnglish
Pages (from-to)441-446
Number of pages6
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number2
Publication statusPublished - 1991 Feb


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