Enhancement of superelasticity in Cu-Al-Mn-Ni shape-memory alloys by texture control

Y. Sutou, T. Omori, R. Kainuma, K. Ishida, N. Ono

Research output: Contribution to journalArticlepeer-review

113 Citations (Scopus)


A significant improvement in the degree of superelasticity in Cu-Al-Mn ductile polycrystalline alloys has been achieved through the addition of Ni and control of the recrystallization texture by thermomechanical processing, which contain the annealing in the fcc (α) + bcc (β) two-phase region, followed by heavy cold reductions of over 60 pct. The addition of Ni to the Cu-Al-Mn alloys shows a drastic effect on the formation of the strong {112|<110> recrystallization texture. Superelastic strains on the order of 7 pct, 3 times larger than those in other Cu-based shape-memory alloys (SMAs), have been realized in the textured Cu-Al-Mn-Ni alloys. The superelastic/strains obtainable in the textured Cu-based SMAs are on a par with those attainable in Ni-Ti-based alloys.

Original languageEnglish
Pages (from-to)2817-2824
Number of pages8
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number9
Publication statusPublished - 2002 Sept


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