Unusual reversible twinning modes and giant superelastic strains in FeNiCoAlNb single crystals

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 ' 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 -' martensitic transformation and elastic mechanical twinning of < 011 >{110} type.

authors

• Karaman, Ibrahim

published proceedings

• SCRIPTA MATERIALIA

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

• 26

complete list of authors

• Chumlyakov, YI||Kireeva, IV||Kutz, OA||Turabi, AS||Karaca, HE||Karaman, I

publication date

• July 2016

publisher

• Elsevier  Publisher

published in

• Scripta Materialia  Journal

keywords

• FeNiCoAlNb
• Iron-based Shape Memory Alloys
• Superelastic Strain
• Superelasticity
• Twinning

Digital Object Identifier (DOI)

• 10.1016/j.scriptamat.2016.03.027

start page

• 43

end page

• 46

volume

• 119

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.scriptamat.2016.03.027