Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals Academic Article uri icon

abstract

  • © 2016 Published by Elsevier B.V. The superelastic response of the Fe41Ni28Co17Al11.5Nb2.5 (at. %) single crystals oriented along the [001] direction was investigated in tension at various temperatures after aging at 973 K for 0.5 h. The aging treatment led to the formation of ordered γ' particles with particle sizes of less than 3 nm. Abnormally large reversible strain of up to 15.3% was observed at 77 K, the highest ever reported for an iron-based shape memory alloys. It has been revealed that this giant superelastic strain, significantly higher than the theoretical transformation strain, is associated with γ-α' martensitic transformation and elastic mechanical twinning of < 011 >{110} type.

altmetric score

  • 0.25

author list (cited authors)

  • Chumlyakov, Y. I., Kireeva, I. V., Kutz, O. A., Turabi, A. S., Karaca, H. E., & Karaman, I.

citation count

  • 20

publication date

  • July 2016